2-Methylpropane
The branched constitutional isomer of butane.
- Formula
- C4H10
- Functional group
- Alkanes
- Molar mass
- 58.12 g/mol
- Also known as
- ISOBUTANE, Trimethylmethane, 1,1-Dimethylethane, iso-butane, R 600a, Caswell No. 503A
Overview
The branched constitutional isomer of butane.
A central CH group is bonded to three equivalent methyl groups. This changes connectivity while retaining the formula C4H10. The central carbon is tertiary, but the molecule contains no tertiary alcohol: that classification would require an OH group at the carbon.
Identifiers
- Formula
- C4H10
- Functional group
- Alkanes
- Molar mass
- 58.12 g/mol
- Also known as
- ISOBUTANE, Trimethylmethane, 1,1-Dimethylethane, iso-butane, R 600a, Caswell No. 503A
Chemical identifiers
- SMILES
- CC(C)C
- InChI
- InChI=1S/C4H10/c1-4(2)3/h4H,1-3H3
- PubChem CID
- 6360
Properties
- Melting Point
- -138.3 °C
- Boiling Point
- -11.7 °C
- Density
- 0.55092 g/cu cm at 25 °C
- Water solubility
- In water, 48.9 mg/L at 25 °C
Related compounds
- Alkanes
The branched constitutional isomer of butane.
References
- PubChem Compound Summary: 2-Methylpropane (CID 6360)National Center for Biotechnology Information · PubChem
Identity, molecular formula, molecular weight and aliases retrieved via PUG REST on 2026-09-08.
- OpenStax Organic Chemistry: Alkanes and alkane isomersJohn McMurry · OpenStax · 2023
Supports the qualitative structure and reactivity context; identity and numerical measurements retain their original references.
- Hazardous Substances Data Bank (HSDB): 2-Methylpropane — melting pointHazardous Substances Data Bank (HSDB)
Retrieved through PubChem PUG View on 2026-09-08. https://pubchem.ncbi.nlm.nih.gov/compound/6360#section=Melting-Point. Source value, complete property clause or compact miscibility statement retained; absent pressure, temperature or phase conditions are not inferred. Original reference: Haynes, W.M. (ed.). CRC Handbook of Chemistry and Physics. 95th Edition. CRC Press LLC, Boca Raton: FL 2014-2015, p. 3-326
- Hazardous Substances Data Bank (HSDB): 2-Methylpropane — boiling pointHazardous Substances Data Bank (HSDB)
Retrieved through PubChem PUG View on 2026-09-08. https://pubchem.ncbi.nlm.nih.gov/compound/6360#section=Boiling-Point. Source value, complete property clause or compact miscibility statement retained; absent pressure, temperature or phase conditions are not inferred. Original reference: Haynes, W.M. (ed.). CRC Handbook of Chemistry and Physics. 95th Edition. CRC Press LLC, Boca Raton: FL 2014-2015, p. 3-326
- Hazardous Substances Data Bank (HSDB): 2-Methylpropane — densityHazardous Substances Data Bank (HSDB)
Retrieved through PubChem PUG View on 2026-09-08. https://pubchem.ncbi.nlm.nih.gov/compound/6360#section=Density. Source value, complete property clause or compact miscibility statement retained; absent pressure, temperature or phase conditions are not inferred. Original reference: Riddick, J.A., W.B. Bunger, Sakano T.K. Techniques of Chemistry 4th ed., Volume II. Organic Solvents. New York, NY: John Wiley and Sons., 1985., p. 80
- Hazardous Substances Data Bank (HSDB): 2-Methylpropane — solubilityHazardous Substances Data Bank (HSDB)
Retrieved through PubChem PUG View on 2026-09-08. https://pubchem.ncbi.nlm.nih.gov/compound/6360#section=Solubility. Source value, complete property clause or compact miscibility statement retained; absent pressure, temperature or phase conditions are not inferred. Original reference: McAuliffe C; J Phys Chem 70: 1267-75 (1966)