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8.02650

Sigma-Aldrich

Crotonic acid

for synthesis

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Synonym(s):
Crotonic acid, ß-Methylacrylic acid, 2-Butenoic acid
Linear Formula:
CH3CH=CHCOOH
CAS Number:
Molecular Weight:
86.09
MDL number:
EC Index Number:
203-533-9

vapor pressure

0.25 hPa ( 20 °C)

Quality Level

assay

≥99.0% (GC)

form

crystals

autoignition temp.

500 °C

potency

1000 mg/kg LD50, oral (Rat)
600 mg/kg LD50, skin (Rabbit)

pH

3 (20 °C, 10 g/L in H2O)

bp

185.0-199.5 °C/1013 hPa

mp

70-73 °C

transition temp

flash point 90 °C

density

1.02 g/cm3 at 20 °C

bulk density

543 kg/m3

storage temp.

2-30°C

InChI

1S/C4H6O2/c1-2-3-4(5)6/h2-3H,1H3,(H,5,6)/b3-2+

InChI key

LDHQCZJRKDOVOX-NSCUHMNNSA-N

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This Item
1130188.220028.20351
Crotonic acid for synthesis

8.02650

Crotonic acid

Crotonic acid 98%

113018

Crotonic acid

Sigma-Aldrich

8.22002

Crotonic anhydride

Crotonoyl chloride (mixture of cis- and trans isomers) for synthesis

8.20351

Crotonoyl chloride

form

crystals

form

-

form

liquid

form

liquid

bp

185.0-199.5 °C/1013 hPa

bp

180-181 °C (lit.)

bp

250 °C

bp

-

mp

70-73 °C

mp

70-72 °C (lit.)

mp

-20 °C

mp

-

density

1.02 g/cm3 at 20 °C

density

1.027 g/mL at 25 °C (lit.)

density

1.04 g/cm3 at 20 °C

density

1.09 g/cm3 at 20 °C

storage temp.

2-30°C

storage temp.

-

storage temp.

2-30°C

storage temp.

2-30°C

Analysis Note

Assay (GC, area%): ≥ 99.0 % (a/a)
Melting range (lower value): ≥ 70 °C
Melting range (upper value): ≤ 73 °C
Identity (IR): passes test

pictograms

Corrosion

signalword

Danger

hcodes

Hazard Classifications

Eye Dam. 1

Storage Class

8A - Combustible, corrosive hazardous materials

wgk_germany

WGK 2

flash_point_f

190.4 °F - closed cup

flash_point_c

88 °C - closed cup


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