4-Methyl-5-thiazolecarboxylic acid

  • 4-Methyl-1,3-thiazole-5-carboxylic acid
Formula
C5H5NO2S
Structure

Registry Numbers and Inventories.
CAS
20485-41-0
RTECS
XJ3680000
Beilstein/Gmelin
120745
Beilstein Reference
4-27-00-04008

Properties.
Formula
C5H5NO2S
Formula mass
143.17
Melting point, °C
235 - 241
Boiling point, °C
304
Vapor pressure, mmHg
0.0004 (25 C)
Density
1.42 g/cm3 (25 C)
Solubility in water
14 g/L (25 C)
pKa/pKb
0.94 (pKa)
Partition coefficient, pKow
0.58
Heat of vaporization
57.43 kJ/mol

Hazards and Protection.
Storage
Keep container tightly closed.
Protection
Compatible chemical-resistant gloves. Chemical safety goggles. Protective clothing.
Respirators
Use respirators and components tested and approved under appropriate government standards such as NIOSH (US) or CEN (EU). Where risk assessment shows air-purifying respirators are appropriate use a dust mask type N95 (US) or type P1 (EN 143) 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 temperratures and pressures.
Incompatibilities
Oxidizing agents.
Decomposition
Carbon monoxide, Carbon dioxide, Nitrogen oxides, Sulfur oxides.

Fire.
Flash Point,°C
137
Fire fighting
Extinguish with 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
3
 
Flammability
0
 
 
Reactivity
0
 

Health.
Exposure effects
   Ingestion
May be harmful if swallowed.
   Inhalation
Material may be irritating to mucous membranes and upper respiratory tract. May be harmful if inhaled.
   Skin
May cause skin irritation. May be harmful if absorbed through the skin. May cause allergic skin reaction.
   Eyes
May cause 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. Remove contaminated clothing and shoes. Call a physician.
   Eyes
In case of contact with eyes, flush with copious amounts of water for at least 15 minutes. Assure adequate flushing by separating the eyelids with fingers. Call a physician.

Transport.