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Key Documents

8.21258

Sigma-Aldrich

2-Methyl-1,3-butadiene

(stabilised) for synthesis

Synonym(s):

2-Methyl-1,3-butadiene, Isoprene

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About This Item

Linear Formula:
CH2=CHC(CH3)=CH2
CAS Number:
78-79-5
Molecular Weight:
68.12
MDL number:
MFCD00008600
UNSPSC Code:
12352002
EC Index Number:
201-143-3
NACRES:
NA.22

vapor pressure

605 hPa ( 20 °C)

Quality Level

200

assay

≥98.0% (GC)

form

liquid

autoignition temp.

220 °C

potency

>2000 mg/kg LD50, oral (Rat)

expl. lim.

1-9.7 % (v/v)

bp

34 °C/1013 hPa

mp

-146 °C

transition temp

flash point -54 °C

density

0.68 g/cm3 at 20 °C

InChI

1S/C5H8/c1-4-5(2)3/h4H,1-2H2,3H3

InChI key

RRHGJUQNOFWUDK-UHFFFAOYSA-N

Analysis Note

Assay (GC, area%): ≥ 98.0 % (a/a)
Density (d 20 °C/ 4 °C): 0.681 - 0.683
Identity (IR): passes test

pictograms

FlameHealth hazard
GHS02,GHS08

signalword

Danger

Hazard Classifications

Aquatic Chronic 3 - Carc. 1B - Flam. Liq. 1 - Muta. 2

Storage Class

3 - Flammable liquids

wgk_germany

WGK 3

flash_point_f

-65.2 °F - closed cup

flash_point_c

-54 °C - closed cup

Certificates of Analysis (COA)

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