Pigments & Colorants
REACH
2-aminophenol
CAS Number
95-55-6
EC Number
202-431-1
What is 2-aminophenol?
2-Aminophenol (CAS 95-55-6), also known as o-hydroxyaniline, is an aromatic amine intermediate.
Where is 2-aminophenol used?
- Dyes: building block for azo and mordant dyes in textile and leather dyeing
- Pharmaceuticals: synthesis of benzoxazole-based APIs and heterocyclic compounds with an ortho-amino-hydroxyl substitution pattern
- Personal care: oxidative hair dye intermediate coupling with developer agents for brown and auburn shades
- Rubber and polymers: antioxidant and antiozonant compounds that extend service life under thermal stress
- It functions primarily as a building block for azo dyes, active pharmaceutical ingredients, and rubber antioxidants.
Commercial specifications
- Purity typically 98% to 99%+ by HPLC or titration
- Packaging from multi-kilogram bags to bulk drums
Other Names (Synonyms)
o-hydroxyaniline|O-AMINOPHENOL|2-Hydroxyaniline|Phenol, 2-amino-|2-Amino-1-hydroxybenzene|Fouramine OP|Benzofur GG|Pelagol Grey GG
What are the physical properties of 2-aminophenol?
Melting Point 170-174 °C
Boiling Point 174 °C
Density 1.328 g/cm³ @ Temp: 25 °C
Flash Point 168 °C
Appearance o-Aminophenol appears as colorless needles or as white crystalline substance turning tan to brown on exposure to air.
Color White to brown
Form Powder
Water Solubility 17 g/L (20 ºC)
Vapor Pressure 14 hPa (153 °C)
Refractive Index 1.5444 (estimate)
pH 6.5-7.5 (10g/l, H2O, 20℃)
Log P 0.620
How is 2-aminophenol classified and handled safely? Learn More
Warning
GHS07· Irritant GHS08· Health Hazard GHS09· Environmental Hazard
Hazard Statements
H302 Harmful if swallowed
H317 May cause an allergic skin reaction
H332 Harmful if inhaled
H341 Suspected of causing genetic defects
Precautionary Statements
P203 Obtain, consult and follow expert instructions for use.
P260 Do not breathe dust/fume/gas/mist/vapours/spray.
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P264 Wash … thoroughly after handling.
Which trade and regulatory codes apply to 2-aminophenol?
HS Code 29222900
UN Number 2512
ADR Class 6.1
Packing Group III
Storage Class 6.1C - Combustible acute toxic Cat.3
toxic compounds or compounds which causing chronic effects
WGK (Germany) 2