Patent Blue V
Patent Blue V is a synthetic blue food colour used for shade development, visual identity, colour correction and batch-to-batch colour standardisation in selected food applications where E131 is permitted. It can deliver an intense blue shade at low dosage, making it useful in carefully controlled colour systems such as confectionery, jelly products, desserts, beverages, decorative preparations and compound colour blends.
Patent Blue V should not be treated as a generic “blue colour.” Industrial performance depends on dye strength, salt form, purity, solubility, pH, heat exposure, light exposure, oxidising or reducing ingredients, packaging, product water activity, regulatory market and label requirements. Buyers should define the exact application, target shade, destination country and processing conditions before requesting quotations.
Product identity
| Product | Patent Blue V |
|---|---|
| Also known as | E131, Food Blue 5, C.I. 42051, Acid Blue 3, Sulphan Blue, Patentblau V |
| Category | Colours & Colouring Foods |
| Primary function | Synthetic food colour for blue shade development, visual identity, colour correction and colour standardisation |
| E / INS number | E131, subject to destination-market confirmation |
| CAS / identity | 3536-49-0; Patent Blue V calcium salt / synthetic triphenylmethane dye family |
| Colour Index | C.I. 42051 |
| Typical form | Powder, granule, liquid solution, aqueous blend, dispersion or supplier-specific food-colour preparation |
| Key purchasing basis | Dye content, colour strength, shade, solubility, purity, subsidiary dyes, heavy metals, pH stability, light stability, documentation and market permission |
Application fit
Potential use areas may include:
- Confectionery, sugar decorations, jelly sweets, gummies and candy systems
- Desserts, gelatin products, puddings, toppings and decorative preparations
- Beverages, beverage bases, syrups and blue shade correction where permitted
- Sauces, fillings, glazes and processed foods requiring controlled blue shade
- Snack coatings, seasoning systems and visual identity applications where permitted
- Compound colour blends with yellow, red or green colour systems to create target shades
- Industrial colour standardisation where batch-to-batch visual consistency is required
Technical profile for manufacturers
Patent Blue V is selected when an intense blue shade is required at low dosage in a market and food category where E131 is permitted. As a synthetic dye, it can provide strong colour impact and high tinting strength compared with many natural blue colour systems. However, its suitability depends on stability, regulatory permission and finished-product label strategy.
Industrial colour approval should be based on a complete colour trial. The same dye dosage can appear different depending on product opacity, pH, dissolved solids, fat content, protein system, packaging, processing temperature and storage light exposure. For this reason, Patent Blue V should be tested in the finished food matrix, not only in water.
| Technical factor | Industrial relevance |
|---|---|
| Colour strength | Defines dosage efficiency and cost-in-use. Colour strength must be compared using the same test method and dilution basis. |
| Shade and undertone | Important for matching brand standards and avoiding unwanted green, violet or dull notes in the finished product. |
| Solubility | Powder and liquid forms must dissolve or disperse fully in the intended system to avoid specks, streaks or uneven colour. |
| pH sensitivity | Patent Blue V shade can shift depending on acidity. Acid beverages, gels and fruit systems require application testing. |
| Light stability | Light exposure can reduce colour intensity over shelf life. Transparent packaging and display lighting should be evaluated. |
| Heat stability | Pasteurisation, hot filling, baking, cooking, retort or extrusion may affect colour intensity depending on matrix and exposure time. |
| Oxidation and reduction | Ingredients such as ascorbic acid, sulphites, reducing sugars, minerals or oxidising systems can influence shade stability. |
| Matrix opacity | Clear beverages, opaque dairy-style systems, gels and fat-based products can show the same colour differently. |
| Purity profile | Subsidiary dyes, heavy metals, insoluble matter and other purity parameters must comply with destination-market requirements. |
| Regulatory status | Not all countries permit Patent Blue V in food. Permission must be checked by food category, use level and label declaration. |
Grade selection guide
Patent Blue V may be supplied as a dry dye, granule, liquid colour, dispersion or customized blend. The correct form depends on the production process, dosing system, required accuracy, dust control, solubility and application matrix.
| Grade family | Typical purchasing logic | Common application direction |
|---|---|---|
| Powder dye | High strength, compact packaging and flexible dosing when the plant can handle colour powders accurately. | Dry blends, confectionery, colour premixes, beverage bases, sauces and compound colour systems. |
| Granular / low-dust grade | Improved handling and reduced airborne colour dust in industrial plants. | Large-scale dry blending, operator-sensitive areas, premix plants and automated dosing. |
| Liquid solution | Easier metering and faster incorporation in aqueous systems. | Beverages, syrups, desserts, glazes, fillings, sauces and products using liquid dosing systems. |
| Pre-diluted colour blend | Improved dosing accuracy where very low dosage of concentrated dye is difficult to manage. | Small-batch products, colour correction, artisan-to-industrial scale-up and sensitive shade matching. |
| Compound colour blend | Patent Blue V blended with other permitted colours to match a brand-specific shade. | Green, turquoise, violet, deep blue, neutralized or custom beverage and confectionery shades. |
| Dispersion or special preparation | Designed for a specific matrix where direct dye addition may cause specking or poor distribution. | Coatings, glazes, high-solids systems, fat-influenced matrices or complex processed foods. |
| Export-compliance grade | Supplied with market-specific purity, documentation and label support. | Products shipped to markets with strict colour-additive documentation or import checks. |
Functional roles in colour systems
Patent Blue V is primarily used for visual control, but in industrial colour work the target is more than “blue.” The correct colour system must deliver repeatable shade, stability, regulatory compliance, process compatibility and consumer-acceptable appearance throughout shelf life.
| Functional role | What Patent Blue V can support | Typical evaluation method |
|---|---|---|
| Blue shade development | Creates blue visual identity in permitted food categories. | Visual comparison, spectrophotometer reading, dilution curve and consumer-style viewing panel. |
| Shade correction | Adjusts green, violet or grey undertones when blended with other colours. | Bench blend trials, L*a*b* measurement, delta E tracking and target-standard comparison. |
| Batch standardisation | Reduces colour variation across raw materials, processing batches and production lines. | Batch colour records, colourimeter data, retained sample comparison and production QC limits. |
| Low-dosage tinting | Provides strong colour impact at low inclusion levels where permitted. | Dosage ladder, cost-in-use analysis, regulatory use-level calculation and sensory review. |
| Compound shade creation | Combines with yellow, red or other blue colours to produce turquoise, green, violet or specialty shades. | Blend matrix, accelerated stability, packaging trial and final-product visual approval. |
| Visual identity protection | Maintains product appearance against processing, packaging and storage variability. | Accelerated shelf-life test, light exposure test, heat test and finished-package monitoring. |
Application guidance by industry
Beverages, syrups and drink bases
In beverages, Patent Blue V may provide strong blue shade in clear or semi-clear systems where permitted. Acid level, preservatives, vitamin C, minerals, light exposure and packaging transparency should be evaluated carefully.
- Key requirements: full solubility, no haze, stable shade, low sediment, compatibility with acids and preservatives.
- Common partners: citric acid, malic acid, sweeteners, flavours, preservatives, cloud systems and other permitted colours.
- Critical tests: pH stability, heat treatment, light exposure, packaging trial, sediment, ring formation and shelf-life shade retention.
Confectionery, gummies and jelly sweets
In confectionery, Patent Blue V may be used for intense blue shade or blended shades. High sugar solids, acids, gel systems, cooking temperature and packaging exposure can influence final shade and stability.
- Key requirements: bright shade, uniform distribution, low specking, heat tolerance and stable appearance during storage.
- Common partners: gelatin, pectin, starch, sugars, polyols, acids, flavours, glazing agents and other permitted colours.
- Critical tests: cooking trial, pH effect, gel clarity, colour bleed, packaging stability, light exposure and sensory appearance.
Desserts, gels and dairy-style systems
In desserts and gels, colour appearance depends on opacity, protein, fat, pH, gel clarity and processing temperature. Patent Blue V can appear differently in clear gelatin than in dairy-style desserts or whipped systems.
- Key requirements: shade consistency, no colour bleeding, no protein interaction, stable appearance and clean visual finish.
- Common partners: gelatin, carrageenan, starch, pectin, dairy proteins, plant proteins, sweeteners and flavour systems.
- Critical tests: heat process, pH shift, storage colour, phase separation, opacity effect and refrigerated shelf-life review.
Sauces, fillings and glazes
In sauces, fillings and glazes, colour must remain uniform through mixing, filling, heating, cooling and storage. High solids, acidity, gums and fruit systems can influence colour intensity and shade.
- Key requirements: even dispersion, stable shade, no streaking, no migration and compatibility with the thickener system.
- Common partners: starches, gums, acids, sugars, fruit preparations, flavours and other colour blends.
- Critical tests: viscosity impact, heat stability, pH, colour migration, storage, freeze-thaw where relevant and package appearance.
Snack coatings and seasoning systems
Patent Blue V may be evaluated in selected snack coatings or seasoning systems where permitted and where a blue or green shade is required. Dry colour distribution and seasoning adhesion are key technical controls.
- Key requirements: dry blend uniformity, low dusting, stable shade, no staining beyond target and compatibility with oil or seasoning carrier.
- Common partners: salt, acids, starches, maltodextrin, flavours, oils, anti-caking agents and compound colour systems.
- Critical tests: dry blend uniformity, coating adhesion, rub-off, light stability, moisture exposure and packaging trial.
Colour premixes and industrial blends
Many manufacturers prefer colour premixes to reduce weighing errors and improve production consistency. Patent Blue V may be diluted with carriers or blended with other permitted colours to produce a defined colour standard.
- Key requirements: uniform blend, controlled strength, accurate dosing, carrier compatibility and complete documentation.
- Common partners: maltodextrin, dextrose, salt, sugar, gums, liquid carriers, other certified colours and anti-caking agents.
- Critical tests: assay uniformity, flowability, colour strength, particle segregation, shelf life and batch-to-batch delta E control.
Comparison with related blue colour options
Patent Blue V is one option within a wider blue-colour toolbox. Buyers should compare shade, regulatory status, clean-label expectations, stability, pH range and cost-in-use before final approval.
| Colour option | Typical distinction | Industrial relevance |
|---|---|---|
| Patent Blue V / E131 | Synthetic intense blue dye with strong tinting power where permitted. | Useful for selected blue shade systems but requires strict market and food-category confirmation. |
| Brilliant Blue FCF / E133 | Widely used synthetic blue in many markets, but permissions still vary by country and food category. | Often compared for shade, stability, regulatory access and cost-in-use. |
| Indigotine / E132 | Synthetic blue dye with different shade and stability profile. | Can be used alone or in blends where permitted for deeper blue or violet directions. |
| Spirulina blue | Natural-source blue colour based on phycocyanin, sensitive to heat, light and acid. | Useful for natural positioning where permitted, but may need cold-process or neutral-pH conditions. |
| Anthocyanin blue systems | Natural-source colours that can shift with pH, often more stable in acidic red-purple ranges than true blue. | Useful for natural or fruit-based positioning but shade depends strongly on pH and formulation. |
| Butterfly pea flower colour | Natural-source anthocyanin colour with pH-dependent blue to purple behaviour. | Useful for specialty beverages and natural-colour concepts where market rules permit. |
| Gardenia blue | Natural-derived blue colour used in some markets with specific regulatory restrictions. | Useful in selected Asian and export applications where permitted and stable. |
Specification checklist for purchasing
For industrial sourcing, Patent Blue V quotations should be compared by colour strength, purity, physical form, solubility, stability data and regulatory documentation. A cheaper colour may not be economical if it has weak strength, poor solubility, incomplete documents, unacceptable impurities or limited market permission.
| Specification area | Recommended buyer requirement |
|---|---|
| Regulatory identity | Confirm E131, CAS 3536-49-0, C.I. 42051, food-grade status and destination-market compliance. |
| Dye content / assay | Request colour strength, assay basis, active dye content and test method. |
| Shade standard | Request reference shade, absorbance data, L*a*b* values or supplier colour-standard method where available. |
| Subsidiary dyes | Confirm limits for subsidiary colouring matters and impurities according to relevant food-colour specifications. |
| Water-insoluble matter | Important for beverages, clear gels and products where specks or haze are unacceptable. |
| Heavy metals | Request lead, arsenic, mercury, cadmium or other market-specific limits. |
| Residual salts and inorganic matter | Relevant for purity comparison, solubility and consistency between suppliers. |
| Particle size | Important for powder handling, dusting, dry blending, dissolution speed and colour uniformity. |
| Solubility | Request solubility guidance for water, syrup, acid systems or other application matrices. |
| Stability data | Request available information for pH, heat, light, oxygen, reducing agents, preservatives and packaging exposure. |
| Microbiology | Usually relevant for liquid preparations, blends or carriers. Request total plate count, yeast and mold and pathogen limits where applicable. |
| Carrier declaration | For blends or liquid preparations, confirm all carriers, solvents, preservatives, stabilizers and allergens. |
| Dietary declarations | Request allergen statement, GMO statement, gluten status, vegan / vegetarian suitability, halal and kosher certificates where required. |
| Packaging and shelf life | Bag, jar, drum, bottle, liner, net weight, pallet configuration, shelf life, storage conditions and light protection. |
Colour matching and validation guidance
Colour approval should be based on the final product matrix and packaging. A water dilution may be useful for initial comparison, but it does not predict how the colour will appear in a beverage with acid, a gummy with gelatin, a dairy-style dessert with protein, a glaze with starch or a dry seasoning with salt and oil.
Recommended colour trial protocol
- Confirm destination-market permission for Patent Blue V before formulation work.
- Define the target shade using a physical reference, L*a*b* values, colourimeter data or approved retained sample.
- Prepare a dosage ladder in the actual product matrix, not only in water.
- Run the real process: mixing, heating, pasteurisation, cooking, gelation, filling, cooling or drying.
- Evaluate colour after processing, after 24 hours, and during accelerated and real-time shelf life.
- Test pH, light exposure, packaging, oxygen exposure, reducing ingredients and storage temperature.
- Confirm label declaration, maximum use level and customer documentation before commercial order.
Common colour issues
- Shade shift in acid systems or products with changing pH
- Fading under transparent packaging or strong retail display light
- Colour loss from reducing agents such as ascorbic acid or sulphite-containing systems
- Specking from incomplete dissolution or poor powder dispersion
- Streaking from adding concentrated liquid colour too late in the process
- Over-colouring because high-strength dye was not pre-diluted for accurate dosing
- Unwanted green or violet undertone when blended with other colours
- Regulatory rejection because the food category or destination market does not permit E131
Stability factors to evaluate
Patent Blue V stability should be tested under real commercial conditions. The factors below are especially important for products with long shelf life, transparent packaging, high-acid formulas or export distribution.
| Stability factor | What to test |
|---|---|
| pH | Test target shade across initial pH, processing pH and expected pH drift during shelf life. |
| Light | Compare clear packaging, opaque packaging, UV exposure and retail light conditions. |
| Heat | Evaluate pasteurisation, hot fill, baking, cooking, retort, syrup cooking or drying conditions. |
| Oxygen | Review headspace, packaging oxygen barrier and oxidative ingredient systems. |
| Reducing ingredients | Check ascorbic acid, sulphites, reducing sugars, certain flavours and mineral systems. |
| Preservatives | Test compatibility with sorbates, benzoates, sulphites and other preservation systems where used. |
| Proteins and hydrocolloids | Evaluate whether proteins, gums, starches or gelatin affect shade, haze, bleeding or migration. |
| Water activity | Review colour migration, surface bleeding and crystal appearance in confectionery and low-moisture products. |
Regulatory, label and positioning considerations
Patent Blue V requires careful regulatory review because synthetic colour permissions vary significantly by market. A product formulated for one region may not be suitable for another region. Food category, dosage, label declaration, warning statements, children’s food restrictions, import approval and retailer policy should be checked before commercial production.
| Regulatory question | Buyer action |
|---|---|
| How should it be declared? | Request supplier label guidance and verify whether the local declaration should be “Patent Blue V,” “E131,” “colour: Patent Blue V” or another approved wording. |
| Is it permitted in the destination country? | Confirm legal status before formulation and again before shipment, especially for export products. |
| Is it permitted in the food category? | Colour permission may vary by product type, such as beverages, confectionery, desserts, decorations or sauces. |
| What is the maximum use level? | Calculate dosage based on active dye content, finished-product use level and local maximum limits. |
| Are warning statements required? | Some markets require special labelling for certain colours or product categories. Verify local wording. |
| Can natural-colour claims be made? | No. Patent Blue V is synthetic. Natural or colouring-food claims require a different colour system. |
| Are halal or kosher certificates needed? | Certification must match the exact grade, production site, carrier system and supply chain. |
Quality, safety and compliance documents to request
- Product specification or technical data sheet with E131 identity and colour strength
- Certificate of analysis for available batch or representative lot
- Safety data sheet where applicable for powder, liquid, blend or dispersion handling
- Food-grade declaration and destination-market compliance statement
- CAS / identity statement and Colour Index reference
- Assay, dye content, shade standard, absorbance data or colour-strength method
- Subsidiary dye limits and colouring-matter impurity profile
- Heavy metals, arsenic, lead, mercury, cadmium and other contaminant statements where required
- Water-insoluble matter, moisture, ash and purity information where included in the specification
- Carrier declaration for liquid colours, premixes, dispersions or diluted blends
- Allergen statement, GMO statement, gluten statement, vegan / vegetarian statement and cross-contact information
- Halal, kosher or other certificates when required
- Microbiological specification for liquid preparations or carrier-based blends where relevant
- Shelf-life statement, storage conditions and retest policy
- Packaging specification, net weight, pallet configuration and container loading information
- Application guidance for pH, heat, light, dosage, order of addition and stability testing where available
Packaging, storage and handling
Patent Blue V may be supplied in sealed bags, jars, drums, bottles, pails or cartons depending on form and supplier. Colour products should be protected from moisture, direct light, heat, contamination and accidental cross-contact with other colours. Small dosing errors can create visible shade variation, so storage and dispensing controls are important in colour rooms and premix areas.
| Common packaging | Typical options may include 1 kg, 5 kg, 10 kg, 20 kg or 25 kg packs, bottles, drums or customized colour-room packs depending on grade and supplier. |
|---|---|
| Storage conditions | Store sealed in a cool, dry, clean and light-protected warehouse. Follow the supplier’s exact storage recommendations. |
| Light protection | Protect powder and liquid colours from direct sunlight and strong warehouse lighting to reduce shade change risk. |
| Moisture control | Keep dry forms tightly closed to prevent caking, staining, poor flow and dissolution issues. |
| Dust and staining control | Use colour-room procedures, local ventilation, protective clothing and spill-control methods stated in the SDS. |
| Dosing control | Use calibrated scales, pre-dilution where needed and documented batch records because low dosages can strongly affect shade. |
| Shelf life | Supplier-specific. Request shelf-life statement, storage conditions and retest policy before order confirmation. |
| Logistics | Confirm HS code, country of origin, pallet configuration, temperature or light sensitivity, import requirements and colour-additive documents. |
Technical purchasing notes
When reviewing Patent Blue V, compare the supplier specification against the intended food application, target shade, process conditions, label expectations and local rules. For industrial purchasing, the most useful inquiry normally includes target colour strength, physical form, application, pH, heat exposure, packaging type, quantity, destination and document requirements.
Cost comparison should be based on cost-in-use and validated colour performance rather than price per kilogram alone. A higher-strength, well-documented grade may be more economical if it reduces dosage, improves shade matching, avoids specking, improves shelf-life stability and prevents regulatory delays. A lower-cost grade may become expensive if it lacks impurity data, colour consistency or destination-market documentation.
How to request this product
Send the product name, E number, target shade, application, required form, colour strength requirement, quantity, destination country, packaging preference, expected shipment date and required documents. If you already purchase Patent Blue V, attach or describe your existing specification, certificate of analysis, colour standard, dosage level, label declaration, packaging type or trial result so supplier options can be compared more accurately.
Recommended RFQ information
- Product name: Patent Blue V / E131 / C.I. 42051
- Required function: blue shade development, colour correction, colour standardisation, compound blend or visual identity
- Preferred form: powder, granule, low-dust grade, liquid solution, pre-diluted blend, dispersion or custom colour blend
- Application: beverage, syrup, confectionery, gummy, jelly, dessert, glaze, sauce, snack coating, decoration or other use
- Target shade: physical reference, L*a*b* target, retained sample, brand standard or colour-strength requirement
- Process conditions: pH, heat treatment, cooking, pasteurisation, hot fill, storage temperature, light exposure and packaging type
- Performance target: no specks, no fading, no shade shift, no colour bleeding, clear solution, stable blend or low-dust handling
- Regulatory requirement: E131 confirmation, destination-market permission, food-category use level, label declaration and warning review
- Quality requirements: dye content, subsidiary dyes, heavy metals, water-insoluble matter, microbiology where relevant, allergen, GMO, halal or kosher
- Quantity: sample quantity, first commercial order and annual forecast
- Destination: country, port, incoterm and required import documents
- Packaging: bag size, jar size, bottle size, drum size, light-protected packaging or colour-room pack preference
- Documentation: TDS, COA, SDS, food-grade declaration, regulatory statement, origin, impurity data, shelf life and packaging details
- Commercial requirement: target price basis, shipment date, payment term and preferred delivery schedule
Useful answers
What is Patent Blue V used for in food manufacturing?
Patent Blue V is used for visual identity, blue shade development, colour correction and batch-to-batch colour standardisation in selected food applications where E131 is permitted. Exact suitability depends on grade, food category, dosage, process, regulations and supplier documents.
Is Patent Blue V a natural colour?
No. Patent Blue V is a synthetic blue food colour. It should not be positioned as a natural colour or colouring food. Buyers requiring natural blue options should evaluate alternative natural colour systems separately.
Is Patent Blue V stable in all foods?
No. Patent Blue V can be affected by pH, light, heat, reducing ingredients, oxidising ingredients, minerals, preservatives, packaging and storage conditions. The final product should be tested through processing and shelf life.
Which grade should I request?
The correct grade depends on application and dosing method. Beverages may require liquid solution or highly soluble powder. Dry blends may require powder or low-dust granule. Colour-sensitive products may require a pre-diluted blend for accurate dosing. Buyers should request colour strength, assay, solubility, impurity data, regulatory documents and stability guidance.
Can Global Food Additives source Patent Blue V?
Global Food Additives can review sourcing options for Patent Blue V according to target colour strength, physical form, application, quantity, destination market, packaging and required documentation.
Which documents should be requested?
Buyers commonly request a technical data sheet, product specification, certificate of analysis, safety data sheet where applicable, food-grade declaration, E131 confirmation, Colour Index identity, origin statement, impurity data, allergen statement, GMO statement, shelf-life information, label recommendation and packaging details.
Is this product permitted in every country?
No. Patent Blue V is not permitted in every country or every food category. Buyers should verify destination-market rules, maximum use levels, label declaration, warning requirements and import rules before commercial use.
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