Pigment Yellow 1 or CI 11680 is a chemical compound, a synthetic yellow dye also known as Pigment Yellow 1, Hansa Yellow G

Chemical name: 2-[(4-Methyl-2-nitrophenyl)azo]-3-oxo-N-phenylbutyramide

What it is used for and where

Cosmetics

It is a cosmetic ingredient restricted IV/4 as a Relevant Item in the Annexes of the European Cosmetics Regulation No. 1223/2009. Reported substance or ingredient: 2-[(4-Methyl-2-nitrophenyl)azo]-3-oxo-N-phenylbutyramide

It is an ingredient that makes the final product more aesthetically attractive, but may pose a potential risk to human health with undesirable side effects especially when used continuously as it can be absorbed through the skin or mucous membranes.

Safety

It is an ingredient that has some important contraindications concerning the health profile: it should not come into contact with mucous membranes. (Document 32009R1223. Regulation (EC) No 1223/2009 of the European Parliament and of the Council of 30 November 2009 on cosmetic products (recast) (Text with EEA relevance)

Molecular Formula  C₁₇H₁₆N₄O₄

Molecular Weight     340.33 g/mol

CAS   2512-29-0

EC number    219-730-8

UNII RMB4YA40UY

DTXSID4041735

Synonyms: 

CI 11680

Permansa Yellow G

Pigment yellow 1

Monolite Yellow GN

Hansa Yellow G