TRANS-2-BUTENOIC ACID Property

Melting point:

70-72 °C (lit.)

Boiling point:

180-181 °C (lit.)

Density 

1.027 g/mL at 25 °C (lit.)

vapor density 

2.97 (vs air)

vapor pressure 

0.19 mm Hg ( 20 °C)

refractive index 

1.4228

FEMA 

3908 | (E)-2-BUTENOIC ACID

Flash point:

190 °F

storage temp. 

Store below +30°C.

solubility 

H2O: soluble

pka

4.69(at 25℃)

form 

Crystalline Flakes

color 

White to light yellow

PH

3 (10g/l, H2O, 20℃)

Odor

at 1.00 %. milky

Odor Type

milky

explosive limit

15.1%, 171°F

Water Solubility 

94 g/L (25 ºC)

Merck 

14,2597

JECFA Number

1371

BRN 

1719943

InChIKey

LDHQCZJRKDOVOX-NSCUHMNNSA-N

LogP

0.85 at 25℃

CAS DataBase Reference

107-93-7(CAS DataBase Reference)

NIST Chemistry Reference

Crotonic acid(107-93-7)

EPA Substance Registry System

2-Butenoic acid, (2E)- (107-93-7)

Safety

Hazard Codes 

C,N,Xi

Risk Statements 

21/22-34-50/53-36/37/38

Safety Statements 

26-36/37/39-45-61-37/39

RIDADR 

UN 2823 8/PG 3

WGK Germany 

3

RTECS 

GQ2900000

Autoignition Temperature

744 °F

HazardClass 

8

PackingGroup 

III

HS Code 

29161940

Toxicity

LD50 orally in rats: 1.0 g/kg (Smyth, Carpenter)

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H318Causes serious eye damage

Precautionary statements

P280Wear protective gloves/protective clothing/eye protection/face protection.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

TRANS-2-BUTENOIC ACID Chemical Properties,Usage,Production

Chemical Properties

White to light yellow crystalline flakes

Chemical Properties

2-Butenoic acid is a crystalline compound with a pungent odor.

Uses

trans-Crotonic acid is used in the copolymerization of crotonic acid hydrogel systems by using gamma-rays. The crosslinked copolymeric crotonic acid hydrogels release fertilizers and drugs that help to prevent environmental pollution.

Definition

ChEBI: Crotonic acid is a but-2-enoic acid with a trans- double bond at C-2. It has been isolated from Daucus carota. It has a role as a plant metabolite. It is a conjugate acid of a crotonate.

Preparation

(E)-2-Butenoic acid may be formed by oxidation of crotonaldehyde, 2-butenal. If (Z)-butenoic acid is heated at 180°C, it is converted to (E)-2-butenoid acid.

General Description

Crotonic acid undergoes esterification with butan-2-ol by following second order reaction kinetics.

Flammability and Explosibility

Not classified

storage

Store at RT

Purification Methods

Distil the acid under reduced pressure and/or recrystallise it from pet ether (b 60-80o) or water, or by partial freezing of the melt. [Beilstein 2 IV 1498.]