Basic Orange 31
[CAS# 97404-02-9]

Identification

• Classification: Dyes and pigments >> Dyes >> Basic dye
• Name: Basic Orange 31
• Synonyms: 2-((4-Aminophenyl)azo)-1,3-dimethyl-1H-imidazolium chloride
• Molecular Formula: C₁₁H₁₄ClN₅
• Molecular Weight: 251.71
• CAS Registry Number: 97404-02-9
• EC Number: 306-764-4

Safety Data

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Acute toxicity	Acute Tox.	4	H302
Skin sensitization	Skin Sens.	1	H317
Serious eye damage	Eye Dam.	1	H318
Chronic hazardous to the aquatic environment	Aquatic Chronic	2	H411
Acute toxicity	Acute Tox.	4	H312
Acute toxicity	Acute Tox.	4	H332
Chronic hazardous to the aquatic environment	Aquatic Chronic	3	H412
Eye irritation	Eye Irrit.	2	H319
Skin irritation	Skin Irrit.	2	H315
Specific target organ toxicity - single exposure	STOT SE	3	H335
Chronic hazardous to the aquatic environment	Aquatic Chronic	1	H410
Respiratory sensitization	Resp. Sens.	1B	H334