1-Diazo-2-naphthol-4-sulfonic acid
[CAS# 887-76-3]

Identification

• Classification: Chemical reagent >> Organic reagent >> Sulfonate / sulfinate
• Name: 1-Diazo-2-naphthol-4-sulfonic acid
• Synonyms: 1,2-Naphthoxydiazo-4-sulfonic acid
• Molecular Formula: C₁₀H₆N₂O₄S
• Molecular Weight: 250.23
• CAS Registry Number: 887-76-3
• EC Number: 212-958-9

Properties

• Melting point: 160 °C
• Water solubility: 15.8 g/L (20 °C)

Safety Data

• Hazard Symbols: F;C
• Risk Statements: R11;R34
• Safety Statements: S26;S36/37/39;S45

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Skin corrosion	Skin Corr.	1B	H314
Flammable solids	Flam. Sol.	1	H228
Serious eye damage	Eye Dam.	1	H318
Skin sensitization	Skin Sens.	1	H317
Acute toxicity	Acute Tox.	4	H302
Eye irritation	Eye Irrit.	2	H319
Specific target organ toxicity - single exposure	STOT SE	3	H335
Skin irritation	Skin Irrit.	2	H315

• Transport Information: UN 2925