Metanil Yellow

Metanil Yellow

File:Metanil Yellow Structural Formula V1.svg
Names
IUPAC name Sodium 3-[(4-anilinophenyl)diazenyl]benzenesulfonate
Other names Acid Yellow 36; Acid Metanil Yellow; Monoazo
Identifiers
CAS Number	587-98-4
3D model (JSmol)	Interactive image
ChEBI	CHEBI:87235
ChemSpider	23621349
ECHA InfoCard
EC Number	209-608-2
E number
PubChem CID	3935589
UNII	7SPF5O5BW8
CompTox Dashboard (EPA)	{{#property:P3117}}
InChI InChI=1S/C18H14N3O3S.Na/c22-25(23,24)18-8-4-7-17(13-18)21-20-16-11-9-15(10-12-16)19-14-5-2-1-3-6-14;/h1-13,19H,(H,22,23,24);/q;+1/p-1 Key: NYGZLYXAPMMJTE-UHFFFAOYSA-M
SMILES C1=CC=C(C=C1)NC2=CC=C(C=C2)N=NC3=CC(=CC=C3)S(=O)(=O)[O-].[Na+]
Properties
Chemical formula	C18H15N3NaO3S
Molar mass	376.39 g·mol−1
Melting point	> 250 °C
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Metanil Yellow (Acid Yellow 36) is a dye of the azo class. In analytical chemistry, it is used as a pH indicator and it has a color change from red to yellow between pH 1.2 and 3.2.

Although illegal for food use, Metanil Yellow has been used as an adulterant in turmeric and pigeon pea based food products, particularly in India.

Animal studies have suggested that Metanil Yellow is neurotoxic and hepatotoxic.