2-(2-Hydroxy-5-methylphenyl)benzotriazole

  • Benazol-P
  • 2-(2H-Benzotriazol-2-yl)-4-methylphenol
  • Drometrizole
  • 2-(2-Hydroxy-5-methylphenyl)benzotriazole
  • Phenol, 2-(2H-benzotriazol-2-yl)-4-methyl-
  • Porex-P
Formula
C13H11N3O
Structure
Uses
An ultraviolet light absorber for stabilizing plastics and other organic materials against discoloration and deterioration.

Registry Numbers and Inventories.
CAS
2440-22-4
EC (EINECS/ELINCS)
219-470-5
RTECS
GO6860000
RTECS class
Primary Irritant
Merck
12,3503
Beilstein/Gmelin
615546
Beilstein Reference
6-26
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C13H11N3O
Formula mass
225.25
Melting point, °C
127 - 129
Boiling point, °C
424
Vapor pressure, mmHg
9E-8 (25 C)
Solubility in water
Insoluble
pKa/pKb
8.15 (pKa)
Heat of vaporization
70.5 kJ/mol

Hazards and Protection.
Storage
Keep tightly closed.
Protection
Compatible chemical-resistant gloves. Chemical safety goggles.
Respirators
Government approved respirator.
Small spills/leaks
Sweep up, place in a bag and hold for waste disposal. Avoid raising dust. Ventilate area and wash spill site after material pickup is complete.
Stability
Stable at normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents.
Decomposition
Carbon monoxide, Carbon dioxide, Nitrogen oxides.

Fire.
Flash Point,°C
210
Fire fighting
Extinguish using Water spray. Carbon dioxide, dry chemical powder, or appropriate foam. Wear self-contained breathing apparatus and protective clothing to prevent contact with skin and eyes.
Hazards
Emits toxic fumes under fire conditions.
Health
1
 
Flammability
0
 
 
Reactivity
0
 

Health.
Exposure effects
Irritant. Irritating to eyes.
   Ingestion
May be harmful if swallowed.
   Inhalation
May be harmful if inhaled. Material may be irritating to mucous membranes and upper respiratory tract.
   Skin
May cause skin irritation. May be harmful if absorbed through the skin.
   Eyes
Causes eye irritation.

First aid
 
   Ingestion
If swallowed, wash out mouth with water provided person is conscious. Call a physician.
   Inhalation
If inhaled, remove to fresh air. If not breathing give artificial respiration. If breathing is difficult, give oxygen.
   Skin
In case of contact, immediately wash skin with soap and copious amounts of water.
   Eyes
In case of contact, immediately flush eyes with copious amounts of water for at least 15 minutes.

Transport.