C5H8
68.12 g/mol
Industrial ChemicalDanger
2-Methyl-1,3-butadiene
CAS78-79-5EC201-143-3
Category
Industrial Chemical
Compound Class
Other
Primary Use
Monomer for polyisoprene and butyl rubber
2-Methyl-1,3-butadiene, commonly known as isoprene, is an industrial chemical used primarily as a monomer in the production of synthetic rubbers. International health authorities have classified it as a potential human carcinogen.
Monomer for polyisoprene and butyl rubberManufacture of synthetic natural rubberIntermediate for specialty chemicals, including vitamins and pharmaceuticals
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
Restricted or banned substances
Substances on this list are banned or restricted under the named regulation. This page is a compliance reference — verify your obligations under applicable law.
Relevant lists:California Proposition 65
CAS 78-79-5
Related Compounds
ReferenceSame Category
Isobutyl alcohol
CAS78-83-1
solvent for coatings and adhesives
ReferenceSame Category
Methacrolein
CAS78-85-3
Chemical intermediate for resin production
ReferenceSame Category
2-chlorobutane
CAS78-86-4
Organic synthesis intermediate
ReferenceSame Category
1,2-dichloropropane
CAS78-87-5
Chemical intermediate for chlorinated chemicals
Safety Reference
Danger
H224Extremely flammable liquid and vapour
H341Suspected of causing genetic defects
H350May cause cancer
H412Harmful to aquatic life with long lasting effects
H317May cause an allergic skin reaction
H334May cause allergy or asthma symptoms or breathing difficulties if inhaled
H304May be fatal if swallowed and enters airways
H320Causes eye irritation
H335May cause respiratory irritation
H336May cause drowsiness or dizziness
H351Suspected of causing cancer
H372Causes damage to organs through prolonged or repeated exposure
H401Toxic to aquatic life
H411Toxic to aquatic life with long lasting effects
H303May be harmful if swallowed
H316Causes mild skin irritation
H373May cause damage to organs through prolonged or repeated exposure
Customs Tariff Classification
The international HS code for 2-Methyl-1,3-butadiene (CAS 78-79-5) is 2901.24.
HS code (international, 6-digit)
2901.24
EU CN code (8-digit)
2901 24 00
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
2-methylbuta-1,3-diene
InChIKey
RRHGJUQNOFWUDK-UHFFFAOYSA-N
SMILES
CC(=C)C=C
Synonyms (68)
- 1,3-Butadiene, 2-methyl-
- 2-Methyl-1,3-butadiene
- 2-Methylbuta-1,3-diene
- 2-Methylbutadiene
- 2-Methyldivinyl
- 2-methyl-1
- 3-Methyl-1,3-butadiene
- 5L-TP0203
- AMA 7
- Be Be Tex 1223
- CSV 1
- CV 50
- CV 60
- Caoutchouc
- Cartex 600
- DRC 60
- Defo 1000
- Defo 700
- Dynatex GTZ
- Dynatex LA
- E 218 (rubber)
- Ebonite
- Elastic materials, rubber
- Elastomers
- Fultite FB 010K
- Fultite FB 3001
- Fultite FB 520
- Hartex 102HR
- Hartex 103
- Harub 5LV
- Heveacrumb SMR 5L
- Heveaplus
- IR 25
- IR 68
- ISNA 5
- Impervia
- India rubber
- Iotex C 60
- Isopentadiene
- Isopren
- Isoprene
- Isoprene, inhibited
- Kagetex FA 2005
- LATZ latex
- Latex particles
- Lorival R 25
- Lotol L 9241
- Mar DR 1135
- Methyl bivinyl
- Mitsuwa RC paper Cement
- NATURAL RUBBER
- Nafka
- Nafka kristalgom
- Natural latex
- Polyisoprene,chlorinated
- RUBBER LATEX;RUBBERFUME
- Rubber
- Rubber, natural
- Thiokol NVT
- beta-Methylbivinyl
- isopreno
- isoterpene