Benzoic acid

  • Benzenecarboxylic acid
  • Phenyl carboxylic acid
Formula
C6H5COOH
Structure
Description
White powder or crystals, faint, pleasant, slightly aromatic odor.
Uses
Insecticide, Fungicide

Registry Numbers and Inventories.
CAS
65-85-0
EC (EINECS/ELINCS)
200-618-2
EC Class
harmful, irritant
R 22 36/37/38
S 22 26 36/37/39
RTECS
DG0875000
RTECS class
Agricultural Chemical and Pesticide; Mutagen; Human Data; Primary Irritant
UN (DOT)
9094
Merck
13,1092
Beilstein/Gmelin
636131
Beilstein Reference
4-09-00-00273
EPA OPP
9101
Swiss Giftliste 1
G-1229
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C7H6O2
Formula mass
122.12
Melting point, °C
121 - 123
Boiling point, °C
249
Vapor pressure, mmHg
0.00082 (25 C)
Vapor density (air=1)
4.21
Evaporization number
Very low at normal temperatures.
Critical temperature
479
Critical pressure
45
Density
1.316 g/cm3 (20 C)
Solubility in water
< 1 mg/ml
Viscosity
1.48 cp (125 C)
Surface tension
30 g/s2 @ 130 C
Refractive index
1.504 (132C)
pKa/pKb
4.19 (pKa)
Partition coefficient, pKow
1.87
Heat of fusion
18.0 kJ/mol
Heat of vaporization
65.4 kJ/mol
Heat of combustion
-3229 kJ/mol

Hazards and Protection.
Storage
Keep away from heat and flame. Keep away from sources of ignition. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
D2B
Handling
Wash thoroughly after handling. Use only in a well ventilated area. Minimize dust generation and accumulation. Avoid contact with eyes, skin, and clothing. Do not ingest or inhale. Wash clothing before reuse. Keep from contact with moist air and steam.
Protection
Eyes: 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 to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators
A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use.
Small spills/leaks
Avoid runoff into storm sewers and ditches which lead to waterways. Clean up spills immediately, using the appropriate protective equipment. Avoid generating dusty conditions. Remove all sources of ignition. Provide ventilation. Cover with soda ash or sodium bicarbonate and place in a closed container for disposal.
Stability
Stable under normal temperatures and pressures. Volatile in steam.
Incompatibilities
Strong oxidizing agents, strong reducing agents, strong bases.
Decomposition
Carbon monoxide, carbon dioxide, phenol, benzene.

Fire.
Flash Point,°C
121
Autoignition, °C
532
Upper exp. limit, %
8
Lower exp. limit, %
1.4
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Water runoff can cause environmental damage. Dike and collect water used to fight fire. Dusts at sufficient concentrations can form explosive mixtures with air. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. This material in sufficient quantity and reduced particle size is capable of creating a dust explosion. Extinguishing media: Use agent most appropriate to extinguish fire. Use flooding quantities of water. Do NOT use straight streams of water. Cool containers with flooding quantities of water until well after fire is out. In case of fire, use carbon dioxide, dry chemical powder or appropriate foam.
Fire potential
Slightly flammable. Flammable at elevated temperatures.
Hazards
Vapor from molten benzoic acid may form explosive mixture with air. Concentrated dust may form explosive mixture.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.
Health
1
 
Flammability
1
 
 
Reactivity
0
 

Health.
Poison_Class
4
Exposure effects
Prolonged or repeated skin contact may cause dermatitis. Laboratory experiments have resulted in mutagenic effects.
   Ingestion
May cause gastrointestinal irritation with nausea, vomiting and diarrhea. May be harmful if swallowed.
   Inhalation
May cause allergic respiratory reaction. Causes irritation of the mucous membrane. Inhalation of dust may cause irritation of the nose and throat.
   Skin
Causes moderate skin irritation. May cause allergic contact dermatitis.
   Eyes
Causes severe eye irritation and possible injury. Inhalation of dust may cause lachrymation.

First aid
 
   Ingestion
Do NOT induce vomiting. 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
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid. DO NOT use mouth-to-mouth respiration.
   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.
UN number
9094
Response guide
Hazard class
6.1
USCG CHRIS Code
BZA
 
HS Code
2916 31 00
 
Std. Transport #
4966340