4-Aminophenol

Basic Information

CAS No.	123-30-8
EC No.	204-616-2
Linear Formula	H2NC6H4OH
Molecular Weight	109.13 g/mol
Appearance	Light tan to brown crystals
Melting Point	188-190 °C (lit.)
Boiling point	284 °C (lit.)
Density	1.29 g/cm³ (lit.)
RIDADR	UN 2512 Class 6.1 Packing Group III
Chemical Structure

Key Applications

• Acetaminophen precursor: Primary intermediate in the industrial synthesis of paracetamol (acetaminophen).

• Hair dye coupler: Used in oxidative coloring systems for permanent and semi-permanent shades.

• Photographic developer: Employed in black-and-white film and paper processing formulations.

• Dye synthesis: Serves as starting material for azo dyes and sulfur dyes.

• Antioxidant stabilizer: Applied in rubber and polymer formulations to prevent degradation.

• Consistent quality suitable for demanding industrial processes: Verified through multi-step analytical checks.

• Flexible supply arrangements for global customers: Accommodates varying volumes and delivery schedules.

• Full documentation support for industrial procurement: Includes complete SDS, COA and regulatory paperwork.

• Dedicated support for international chemical sourcing: Provides application advice and logistics coordination.

Hazards Classification

GHS Classification: Acute toxicity (oral) Category 3 (GHS06); Acute toxicity (dermal) Category 3 (GHS06); Skin sensitization Category 1 (GHS07); Hazardous to the aquatic environment, acute Category 1 (GHS09); Hazardous to the aquatic environment, chronic Category 1 (GHS09).

Hazard Statements: H301 + H311 Toxic if swallowed or in contact with skin; H317 May cause an allergic skin reaction; H410 Very toxic to aquatic life with long lasting effects.

UN Number: 2512

Hazard Class: 6.1 (Toxic substances)

Packing Group: III

Toxic solid capable of causing sensitization. Store in airtight containers protected from light and moisture in a ventilated area. Handle with gloves, eye protection, and respiratory equipment in designated areas.