Sudan III

Sudan III
Names
	Preferred IUPAC name 1-{[4-(Phenyldiazenyl)phenyl]diazenyl}naphthalen-2-ol
	Other names Sudan Red BK, Fat Ponceau G, Cerasin Red, C.I. 26100, Solvent Red 23, Solvent Red 164, Sudan Red, Sudan Red III, Sudan V, Sudan Red B, Sudan G, Scarlet B, and Tony Red
Identifiers
CAS Number	85-86-9 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:82535 ;
ChEMBL	ChEMBL2001927;
ChemSpider	16736189 ;
ECHA InfoCard	100.001.490
KEGG	C19527 ;
PubChem CID	62331;
UNII	ND733RX3JN ;
CompTox Dashboard (EPA)	DTXSID3041742 ;
	InChI InChI=1S/C22H16N4O/c27-21-15-10-16-6-4-5-9-20(16)22(21)26-25-19-13-11-18(12-14-19)24-23-17-7-2-1-3-8-17/h1-15,27H/b24-23-,26-25+ Key: FHNINJWBTRXEBC-HXEHWPEMSA-N ; InChI=1/C22H16N4O/c27-21-15-10-16-6-4-5-9-20(16)22(21)26-25-19-13-11-18(12-14-19)24-23-17-7-2-1-3-8-17/h1-15,27H/b24-23-,26-25+ Key: FHNINJWBTRXEBC-HXEHWPEMBU;
	SMILES Oc4ccc1ccccc1c4/N=N/c3ccc(\N=N/c2ccccc2)cc3;
Properties
Chemical formula	C22H16N4O
Molar mass	352.397 g·mol−1
Melting point	199 °C (390 °F; 472 K)
Hazards
	GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H315, H318, H319, H335, H413
Precautionary statements	P101, P102, P103, P261, P264, P270, P271, P273, P280, P302+P352, P304+P340, P305+P351+P338, P310, P312, P321, P332+P313, P337+P313, P362, P403+P233, P405, P501
Safety data sheet (SDS)	Sigma-Aldrich Sudan III
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Sudan III is a lysochrome (fat-soluble dye) diazo dye. It is structurally related to azobenzene.^[2]

^ "Safety Data Sheet Sudan III". fishersci.com. Retrieved 24 August 2020.
^ Hunger, Klaus; Mischke, Peter; Rieper, Wolfgang; et al. (2005). "Azo Dyes". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a03_245. ISBN 978-3527306732.