Database/Colorant/Acid Green 25
Mostly petroleum · ISO 16128

Is Acid Green 25 natural?

Mostly not. Bis-amino-anthraquinone chromophore is petrochemical; two sulfonate salt groups counted as mineral-origin on an estimated structure.

INCI nameAcid Green 25
CAS4403-90-1
FormulaC28H20N2Na2O8S2 · 622.6 Da
FunctionColorant
FeedstockSynthesised from petrochemical anthraquinone via amination and sulfonation.…

How we scored it

Estimated bis(alkylamino)-anthraquinone disulfonic acid, MW~622; 2x SO3Na ~206Da natural (mineral) / ~416Da anthraquinone backbone petrochemical; 206/622=0.33
What counts. ISO 16128-2 scores the atoms that remain in the final ingredient. Reagents, solvents, catalysts and protecting groups used during manufacture leave no mass behind and are not counted.

Where it comes from

Synthesised from petrochemical anthraquinone via amination and sulfonation. No natural production route for this dye class.

In plain English

A synthetic green dye used as a cosmetic colorant, made from a petroleum-derived anthraquinone core through industrial synthesis.

CosIng definition: Acid Green 25 is classed chemically as an anthraquinone color. It conforms to the formula. To identify the colorant allowed for use in the European Union (EU), the INCI Name CI 61570 must be used, except for hair dye products.

Natural alternatives with the same function

Aluminum Powder 100% natural origin

Finely powdered aluminum metal used to add shimmer or color to cosmetics. It comes from refining bauxite ore,…

 Aluminum Stearate 100% natural origin

An aluminium salt of stearic acid, a fatty acid from vegetable or animal fat. Used to prevent caking,…

 Anthocyanins 100% natural origin

A natural colorant that gives products red, purple or blue tones. It is recovered from grape skins or…

 Calcium Ferrite 100% natural origin

A mineral pigment made of calcium and iron oxide, used as a colourant in cosmetics. It is produced…

 Calcium Stearate 100% natural origin

The calcium salt of stearic acid, a fatty acid usually from vegetable oils. Used as an anti-caking, thickening…

 Caramel 100% natural origin

A colouring and fragrance ingredient made by heating sugar, sucrose or glucose, until it browns. It comes from…

Structure

2D structure of Acid Green 25

disodium;5-methyl-2-[[4-(4-methyl-2-sulfonatoanilino)-9,10-dioxoanthracen-1-yl]amino]benzenesulfonate

PubChem CID 20431 ↗

References

  1. 1ISO 16128-1:2016 and ISO 16128-2:2017 — Guidelines on technical definitions and criteria for natural and organic cosmetic ingredients and products. ISO, Geneva.
  2. 2Acid Green 25. PubChem CID 20431. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 3ACID GREEN 25. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 4ACID GREEN 25. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=ACID%20GREEN%2025