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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:
Molecular Weight:
68.12
MDL number:
UNSPSC Code:
12352002
EC Index Number:
201-143-3
NACRES:
NA.22

vapor pressure

605 hPa ( 20 °C)

Quality Level

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

Signal Word

Danger

Hazard Statements

Hazard Classifications

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

Storage Class Code

3 - Flammable liquids

WGK

WGK 3

Flash Point(F)

-65.2 °F - closed cup

Flash Point(C)

-54 °C - closed cup


Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

EU REACH Annex XVII (Restriction List)

CAS No.

Certificates of Analysis (COA)

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