4-Isoxazolecarboxamide, 5-methyl-N-(4-(trifluoromethyl)phenyl)

  • HWA-486
  • Leflunomide
  • 5-Methylisoxazole-4-carboxylic acid (4-trifluoromethyl)anilide
  • 5-Methyl-N-(4-(trifluoromethyl)phenyl)-4-isoxazolecarboxamide
Formula
C12H9F3N2O2
Structure

Registry Numbers and Inventories.
CAS
75706-12-6
RTECS
NY2354200
Merck
12,10407

Properties.
Formula
C12H9F3N2O2
Formula mass
270.21
Boiling point, °C
289
Vapor pressure, mmHg
0.0022 (25 C)
Density
1.392 g/cm3 (20 C)
Solubility in water
Insoluble
pKa/pKb
11.45 (pKa)
Partition coefficient, pKow
1.95
Heat of vaporization
52.9 kJ/mol

Hazards and Protection.
Storage
Store in original container in a cool dark place.
Protection
Wear self-contained breathing apparatus, rubber boots & heavy rubber gloves.
Small spills/leaks
Sweep-up/absorb in suitable material, place in a container and hold for disposal. Avoid raising dust. Ventilate area and wash spill site after pickup is complete.

Fire.
Flash Point,°C
129
Fire fighting
Extinguish with carbon dioxide, dry chemical powder or appropriate foam. Water spray. Wear self-contained breathing apparatus and protective clothing to prevent contact with the skin and eyes.
Combustion products
Emits toxic fumes under fire conditions.

Health.
Exposure effects

First aid
 
   Ingestion
If swallowed, wash out mouth with water, provided person is conscious. Seek medical advice.
   Inhalation
Remove to fresh air. If not breathing give artificial respiration. If breathing is difficult, give oxygen. Seek medical attention.
   Skin
Immediately wash skin with soap and copious amounts of water for at least 15 minutes. If irritation persists, seek medical attention.
   Eyes
Immediately flush eyes with copious amounts of water for at least 15 minutes. Seek medical advice.

Transport.