p-Toluic acid

  • 4-Methylbenzoic acid
  • p-Methylbenzoic acid
  • p-Carboxytoluene
  • p-Tolylcarboxylic acid
  • p-Toluylic acid
  • Crithminic acid
Formula
4-(CH3)C6H4COOH
Structure
Description
White powder. Sublimes.

Registry Numbers and Inventories.
CAS
99-94-5
EC (EINECS/ELINCS)
202-803-3
EC Class
harmful, irritant
R 22 36/37/38
S 26 36/37/39
RTECS
XU1575000
RTECS class
Other
Merck
12,9673
Beilstein/Gmelin
507600
Beilstein Reference
4-09-00-01724
Swiss Giftliste 1
G-3155
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C8H8O2
Formula mass
136.15
Melting point, °C
179 - 180
Boiling point, °C
275
Vapor pressure, mmHg
0.0025 (25 C)
Density
1.06 g/cm3 (20 C)
Solubility in water
11.6 g/L
Refractive index
1.5086 (20 C)
pKa/pKb
4.37 (pKa)
Partition coefficient, pKow
2.36
Heat of vaporization
54.3 kJ/mol

Hazards and Protection.
Storage
Store in a cool, dry place. Keep container closed when not in use. Store in a cool, dry, well-ventilated area away from incompatible substances.
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use with adequate ventilation. Minimize dust generation and accumulation. Avoid contact with eyes, skin, and clothing. Keep container tightly closed. Avoid ingestion and inhalation. Do not ingest or inhale.
Protection
Eyes: Wear safety glasses and chemical goggles if splashing is possible. Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves and clothing to prevent skin exposure. Clothing: Wear appropriate protective clothing to minimize contact with skin.
Respirators
Wear a NIOSH/MSHA or European Standard EN 149 approved full-facepiece airline respirator in the positive pressure mode with emergency escape provisions. Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Small spills/leaks
Clean up spills immediately, using the appropriate protective equipment. Sweep up or absorb material, then place into a suitable clean, dry, closed container for disposal. Avoid generating dusty conditions. Provide ventilation.
Disposal code
4
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents, strong bases.
Decomposition
Carbon monoxide, irritating and toxic fumes and gases, carbon dioxide.

Fire.
Autoignition, °C
570
Upper exp. limit, %
6.8
Lower exp. limit, %
1.2
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. To extinguish fire, use water, dry chemical, chemical foam, or alcohol-resistant foam.
Fire potential
This material is probably combustible.

Health.
Poison_Class
3
Exposure effects
Prolonged or repeated skin contact may cause dermatitis.
   Ingestion
May cause irritation of the digestive tract.
   Inhalation
May cause respiratory tract irritation.
   Skin
May cause skin irritation.
   Eyes
May cause eye irritation.

First aid
 
   Ingestion
If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
   Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.
   Skin
Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

Transport.
4. Organic acids
HS Code
2916 39 00