trans-Crotonic acid

  • 2-Butenoic acid, (E)
  • Crotonic acid, (E)
  • trans-2-Butenoic acid
Formula
CH3CH=CHCOOH
Structure
Uses
Substance is used in the production of copolymers with vinyl acetate, in lacquers & paper sizing.

Registry Numbers and Inventories.
CAS
107-93-7
EC (EINECS/ELINCS)
203-533-9
EC Class
irritant
R 21/22 34
S 26 36/37/39 45
RTECS
GQ2900000
RTECS class
Mutagen
UN (DOT)
2823
Merck
13,2625
Beilstein/Gmelin
1719943
Beilstein Reference
4-02-00-01498
US TSCA
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed

Properties.
Formula
C4H6O2
Formula mass
86.09
Melting point, °C
71 - 72
Boiling point, °C
177
Vapor pressure, mmHg
0.51 (25 C)
Density
0.973 g/cm3 (72 C)
Solubility in water
Very soluble
Refractive index
1.4204 (77 C)
pKa/pKb
4.80 (pKa)
Partition coefficient, pKow
0.72
Heat of fusion
13.0 kJ/mol
Heat of vaporization
45.6 kJ/mol
Heat of combustion
-1991 kJ/mol

Hazards and Protection.
Storage
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protection
Wear appropriate protective gloves, clothing and goggles.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
ELIMINATE all ignition sources. Do not touch damaged containers or spilled material unless wearing appropriate protective clothing. Stop leak if you can do it without risk. Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers. DO NOT GET WATER INSIDE CONTAINERS.
Disposal code
4
Stability
No data.

Fire.
Flash Point,°C
87
Autoignition, °C
500
Upper exp. limit, %
15.1
Lower exp. limit, %
2.2
Fire fighting
Small Fires: Dry chemical, carbon dioxide or water spray. Large Fires: Dry chemical, carbon dioxide, alcohol-resistant foam or water spray.
Fire potential
Combustible material: may burn but does not ignite readily.
Hazards
When heated, vapors may form explosive mixtures with air: indoors, outdoors, and sewers explosion hazards.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.

Health.
Poison_Class
4 (Substances and products that must be considered harmful)
Exposure effects
   Ingestion
See Inhalation.
   Inhalation
TOXIC; inhalation, ingestion, or skin contact with material may cause severe injury or death. Effects of contact or inhalation may be delayed.
   Skin
Contact with molten substance may cause severe burns to skin and eyes. See Inhalation.
   Eyes
See Inhalation.

First aid
 
   Ingestion
Seek medical assistance.
   Inhalation
Move victim to fresh air. Apply artificial respiration if victim is not breathing. Do not use mouth-to-mouth method if victim ingested or inhaled the substance; induce artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device. Administer oxygen if breathing is difficult.
   Skin
Remove and isolate contaminated clothing and shoes. Immediately flush with running water for at least 20 minutes. For minor skin contact, avoid spreading material on unaffected skin.
   Eyes
Immediately flush with running water for at least 20 minutes.

Transport.
UN number
2823
Response guide
Hazard class
8
Packing Group
III
 
4. Organic acids
HS Code
2916 19 40