C4H9NO2
103.12 g/mol
Industrial ChemicalDanger
ISOBUTYL NITRITE
CAS542-56-3EC208-819-7
Category
Industrial Chemical
Compound Class
Other
Primary Use
chemical intermediate and illicit inhalant
Isobutyl nitrite is an industrial chemical and chemical intermediate that has also been used as an illicit inhalant. The National Toxicology Program has identified it as a substance that can cause cancer.
chemical intermediateillicit inhalant
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 542-56-3
Related Compounds
ReferenceSame Category
Ethylene glycol monoacetate
CAS542-59-6
chemical intermediate
ReferenceSame Category
Butyl iodide
CAS542-69-8
Organic synthesis intermediate
ReferenceSame Category
Cyclopentadiene
CAS542-92-7
Diene in Diels-Alder reactions
ReferenceSame Category
Monoguanidine phosphate
CAS5423-22-3
flame retardant intermediate
Safety Reference
Danger
H225Highly flammable liquid and vapour
H302Harmful if swallowed
H332Harmful if inhaled
H341Suspected of causing genetic defects
H350May cause cancer
H331Toxic if inhaled
H351Suspected of causing cancer
H370Causes damage to organs
H372Causes damage to organs through prolonged or repeated exposure
H373May cause damage to organs through prolonged or repeated exposure
H371May cause damage to organs
Customs Tariff Classification
The international HS code for ISOBUTYL NITRITE (CAS 542-56-3) is 2920.90.
HS code (international, 6-digit)
2920.90
EU CN code (8-digit)
2920 90 70
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-methylpropyl nitrite
InChIKey
APNSGVMLAYLYCT-UHFFFAOYSA-N
SMILES
CC(C)CON=O
Synonyms (12)
- IBN
- 2-methyl-1-nitrosooxy-propane
- 2-methylpropyl nitrite
- Blackjack
- ISOBUTYL NITRITE
- ISOBUTYL NITRITE [MART.]
- Isobutylnitrit
- Nitrous acid, isobutyl ester
- i-butylnitrite