Spirulina blue is phycocyanin, the blue pigment-protein complex naturally present in the blue-green alga Arthrospira platensis. In the United States it is listed as a colour additive under 21 CFR 73.530, where the identity is defined as the filtered aqueous extract of the dried biomass, with phycocyanins as the principal colouring components. It is the most vivid of the three commercial botanical blues and also the most sensitive to process conditions, because the chromophore sits inside a protein.
What belongs in a spirulina blue specification
- Colour value (E-value) and the wavelength it is measured at. Two suppliers can quote the same headline number from different analytical bases, so the wavelength and the method matter as much as the figure.
- Microcystin: negative. The listing does not set a numeric limit here — it requires the material to be negative for microcystin toxin. That makes the per-batch analytical report the only acceptable evidence, and it is the single line most often missing from a cheap quotation.
- Heavy metals. Lead and arsenic each not more than 2 ppm, mercury not more than 1 ppm.
- Form. Liquid concentrate or spray-dried powder, and whether the grade is water-dispersible — that decides whether it can go into a clear drink at all.
Where the US listing applies — and where it does not
The permitted list under 73.530 is wide, and wider than gardenia blue’s: confections including candy and chewing gum, frostings, ice cream and frozen desserts including non-dairy, dessert coatings and toppings, beverage mixes and powders, yogurts including non-dairy alternatives, custards, puddings, cottage cheese, gelatin, breadcrumbs, ready-to-eat cereals excluding extruded cereals, alcoholic beverages below 20% alcohol by volume, non-alcoholic beverages, unheated seasoning mixes, salad dressings, condiments and sauces, dips, coating formulations for dietary supplement tablets and capsules, and the seasonal colouring of hard-boiled eggshells. As with the other colour additives in this part, it may not be used to colour foods for which a standard of identity has been issued unless that standard authorises it.
One point worth checking against any supplier claim: an FDA amendment published in 2026 that would have widened these uses has been delayed indefinitely. The list above is the one currently in force, so a quotation that leans on an “expanded” list is not relying on anything in effect.
Regulatory status by market
Spirulina extract is authorised in all six markets, but under three different legal theories: a listed colour additive in the United States and Japan, an additive with no E number in Korea, and a colouring food rather than an additive in the EU and UK. The declaration on the pack differs accordingly, and the EU route depends on the extraction process being non-selective.
United States — 21 CFR 73.530
Position
Listed colour additive, exempt from certification, at 21 CFR 73.530, spirulina extract.
Permitted use
Colour in the food categories covered by the listing. Candy and confectionery coating were added to the permitted uses in 2022.
Limits
A further expansion of uses was ordered in February 2026 but its effective date was delayed in March 2026 following objections, in the same order that affected beetroot red. The baseline listing is what can be relied on today.
European Union — colouring food, no E number
Position
Not an E-numbered additive. Arthrospira platensis has a documented history of consumption before 15 May 1997, and an aqueous extract that is not selectively purified falls under the colouring food guidance rather than the additive regime.
Permitted use
Colouring food in foods where colouring foods are accepted, declared on the ingredient list as a colouring food of spirulina rather than as an additive.
Limits
A selectively purified phycocyanin is assessed on a different basis and is not covered by the colouring-food position. No E number exists for this product, so a specification that quotes one is wrong.
United Kingdom — colouring food, no E number
Position
The UK continues to apply the same colouring food distinction as the EU under retained novel food law; no additive listing exists for spirulina extract.
Permitted use
Colouring food, declared as such on the ingredient list.
Limits
As in the EU, the position assumes a non-selectively purified extract. A purified phycocyanin is a different assessment.
Japan — 既存添加物 スピルリナ青色素
Position
Existing food additive (既存添加物) spirulina blue, スピルリナ青色素, in the Japan Existing Food Additives List.
Permitted use
Colourant in foods; label as 着色料(スピルリナ青) or スピルリナ青色素.
Limits
Japan treats this as an additive, unlike the EU colouring-food route, so the Japanese standards for the additive apply and the Japanese name must be used.
Indonesia, Malaysia, Vietnam and Thailand — natural colour
Position
Used as a natural blue colour across these markets and traded commercially in each.
Permitted use
Colour in foods, at the level set by each national additive or food regulation.
Limits
Halal certification is a separate gate; since 18 October 2026 Indonesia requires it for additives and raw materials before clearance, with the certificate issued through BPJPH.
Korea — 스피루리나청색소
Position
Listed in the Korean Food Additives Code as a natural additive (천연첨가물), spirulina blue.
Permitted use
Colour in foods within the Code’s use standards.
Limits
Use standards apply per category, and Korean labelling requires the Korean name.
Choosing it, or not
Phycocyanin denatures with heat and shifts under acid, which makes spirulina blue a strong candidate for chilled or ambient beverages at a controlled pH, and a poor one wherever the process involves retorting, hot filling or baking. If the application is a clear drink and the shade has to be bright, it is usually the first material worth sampling. How it compares with gardenia blue and butterfly pea across heat, pH and permitted lists is set out in gardenia blue, spirulina blue and butterfly pea compared.
Frequently Asked Questions
What is spirulina blue, and what carries the colour?
Spirulina blue is phycocyanin, the blue pigment-protein complex naturally present in the blue-green alga Arthrospira platensis. Under 21 CFR 73.530 the identity is the filtered aqueous extract of the dried biomass, with phycocyanins as the principal colouring components. Because the chromophore sits inside a protein, the material is sensitive to process conditions in a way that small-molecule colours are not.
What must the microcystin result show?
The listing sets no numeric limit; it requires the material to be negative for microcystin toxin. That makes the per-batch analytical report the only acceptable evidence, and it is the single line most often missing from a cheap quotation.
What heavy metal limits apply?
Lead and arsenic each not more than 2 ppm, and mercury not more than 1 ppm, reported against those limits on the certificate of analysis for the lot.
Can spirulina blue be used in a clear beverage?
Yes, if the grade is water-dispersible, since that is what decides whether it can go into a clear drink at all. Phycocyanin denatures with heat and shifts under acid, so it suits chilled or ambient beverages at a controlled pH and is a poor choice wherever the process involves retorting, hot filling or baking.
Does spirulina blue have an E number in the EU?
No. The EU and UK route is colouring food rather than an additive: an aqueous extract that is not selectively purified is declared as a colouring food of spirulina on the ingredient list. No E number exists for this product, so a specification that quotes one is wrong. A selectively purified phycocyanin is assessed on a different basis and is not covered by that position.
Spirulina Blue: The Natural Standard for Brilliant Blue
Product Overview & Biological Origin
Spirulina Blue, scientifically identified as Phycocyanin, is a premium blue pigment-protein complex derived from non-GMO Arthrospira platensis. As one of the rarest true-blue pigments found in nature, it has become the cornerstone of the global “Clean Label” movement.
In 2026, as global food safety regulations accelerate the phase-out of synthetic dyes like FD&C Blue No. 1, Spirulina Blue has emerged as the industry’s primary natural blue solution. Unlike synthetic alternatives, our extract is processed via gentle water extraction, preserving its delicate protein structure and vibrant azure hue while delivering significant antioxidant properties. It is not just a colorant; it is a functional nutrient that meets both regulatory requirements and the modern consumer’s demand for transparency.
Advanced Cold-Water Extraction Process
The quality of Spirulina Blue is determined at the moment of extraction. The production process employs a state-of-the-art Chilled Water Extraction method that avoids the use of harsh chemical solvents or high temperatures. This biological approach ensures that the Phycocyanin protein remains in its native, bioactive state throughout the manufacturing cycle.
By utilizing advanced membrane filtration and low-temperature spray drying, we achieve a high concentration of active pigment while eliminating the typical “seaweed” odor. This results in a neutral-tasting, highly concentrated Spirulina Blue powder that integrates seamlessly into delicate flavor profiles—such as vanilla, coconut, or mint—without affecting the sensory experience.
Key Performance Advantages & Technical Insights
1. Vibrant Transparency & Visual Appeal
Our Spirulina Blue is engineered for Vibrant Transparency. It produces a crystal-clear blue solution without any grit, sediment, or cloudiness. This high solubility is a critical requirement for high-end functional beverages, flavored waters, and syrups where visual clarity is a primary quality indicator for premium branding.
2. Synergistic Health & Antioxidant Benefits
Beyond its coloring function, this pigment is a potent antioxidant. In the human body, it acts as a free-radical scavenger, supporting immune health and exhibiting anti-inflammatory properties. For manufacturers, this allows for a “Dual-Benefit” marketing strategy: positioning the product as both a natural Spirulina Blue colorant and a “Functional Superfood,” adding tangible value to the end consumer.
FDA & EU Standards
Navigating global regulations is a significant challenge for international brands. Our Spirulina Blue is fully compliant with the latest 2026 safety standards:
USA: FDA 21 CFR 73.530 (Spirulina extract as a color additive exempt from certification).
Europe: EU “Coloring Foods” guidelines, where the extract is classified as a food ingredient with coloring properties rather than a synthetic additive (E-number free).
Global Markets: Our production facility is certified Non-GMO, Halal, and Kosher to ensure a smooth supply chain for global distribution.
Primary Applications in Modern Manufacturing
Beverage Industry: This extract is ideal for sports drinks, vitamin-enhanced waters, and low-alcohol beverages. It provides a refreshing “Sky Blue” hue that remains stable in liquid form when stored away from direct UV light.
Confectionery & Bakery: Used extensively in gummy vitamins, frostings, and decorative toppings. It provides a stable, bleed-resistant blue that is especially effective in sugar-coated products.
Dairy & Plant-Based Alternatives: Perfect for Greek yogurts, plant-based milks, and premium ice creams. Spirulina Blue maintains a creamy, pastel blue tone in protein-rich matrices.
Nutraceuticals & Personal Care: In the pharmaceutical sector, it is applied as a natural film-coating for tablets. In cosmetics, it serves as a soothing antioxidant agent in facial serums and hydrating masks.
Stability Optimization
Temperature Control: Phycocyanin is heat-sensitive. For best results, the powder should be added after the heating/pasteurization phase or used in cold-process formulations (below 45°C/113°F).
pH Management: The pigment is most stable between pH 5.0 and 7.5. In highly acidic environments (pH < 4.0), the protein may denature. For acidic beverages, specialized stabilization of the Spirulina Blue is recommended.
Light Protection: Like most natural pigments, prolonged exposure to direct sunlight can cause fading. We recommend UV-protected or opaque packaging to maintain the “brilliant blue” appeal for the duration of the shelf life.
FAQ
Q1: Is Spirulina Blue more cost-effective than synthetic blue dyes? While the initial cost per kilogram is higher than synthetic dyes, the marketing advantage of a “Clean Label” typically results in higher brand equity and consumer trust.
Q2: How does your Spirulina Blue compare to Gardenia Blue? Our product offers a much brighter, more “electric” blue. However, Gardenia Blue is more suitable for high-heat applications like baking. Many clients use both to achieve specific stability targets.
Q3: Can I request a customized concentration for my formulation? Yes. Different formulations require different color intensities. We can assist in providing technical data for various concentration levels to fit your Spirulina Blue formulation needs.
Q4: Does the extract have a strong fishy or algae-like taste? Through advanced purification, the characteristic odor of raw algae is removed. The final Spirulina Blue is virtually odorless and tasteless, ensuring it does not interfere with the flavor profile of the end product.
Transitioning to natural colors is no longer a trend; it is the industry standard. Whether you are formulating a functional beverage or a clean-label confection, our premium Spirulina Blue delivers the consistency, purity, and regulatory compliance you need for success in 2026.
Ready to start your formulation? Contact our team today to request a quote and free sample of our Spirulina Blue.
Technical Data Sheet
