Acid Orange 7
[CAS# 633-96-5]

Identification

• Classification: Dyes and pigments >> Dyes >> Acid dyestuff
• Name: Acid Orange 7
• Synonyms: C.I. 15510; Orange II sodium salt; 4-(2-Hydroxy-1-naphthylazo)benzenesulfonic acid sodium salt; Sodium 4-[(2-hydroxy-1-naphthyl)azo]benzenesulphonate
• Molecular Formula: C₁₆H₁₁N₂NaO₄S
• Molecular Weight: 350.32
• CAS Registry Number: 633-96-5
• EC Number: 211-199-0

Properties

• Melting point: 164 °C
• Water solubility: 116 g/L (30 °C)

Safety Data

• Hazard Symbols: Xi
• Risk Statements: R36/37/38
• Safety Statements: S26;S37/39

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Chronic hazardous to the aquatic environment	Aquatic Chronic	3	H412
Specific target organ toxicity - repeated exposure	STOT RE	1	H372
Eye irritation	Eye Irrit.	2	H319
Skin irritation	Skin Irrit.	2	H315
Specific target organ toxicity - single exposure	STOT SE	3	H335