3-Methyl-1-butanol
Also known as: Isoamyl alcohol, Isobutylcarbinol, Isopentanol, Isopentyl alcohol, 3-methylbutan-1-ol, Isoamylol, i-pentyl alcohol
3-Methyl-1-butanol (CAS 123-51-3) is a compound in the Alcohols category listed in the Jingsj chemical database. It has the molecular formula C5H12O and a molecular weight of 88.148 g/mol. Key properties include a melting point of -117 °C, a boiling point of 131.2±0.0 °C at 760 mmHg, a density of 0.8±0.1 g/cm3 and a flash point of 45.6±0.0 °C. It is classified under GHS with signal word Warning and hazard statements H226 — Flammable liquid and vapour, H315 — Causes skin irritation and H319 — Causes serious eye irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 123-51-3
- Jingsj CID
- J-1328536-8
- Molecular Formula
- C5H12O
- Molecular Weight
- 88.148 g/mol
- Category
- Alcohols
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | -117 °C |
|---|---|
| Boiling Point | 131.2±0.0 °C at 760 mmHg |
| Density | 0.8±0.1 g/cm3 |
| Flash Point | 45.6±0.0 °C |
| Exact Mass | 88.088814 |
| PSA | 20.23000 |
| LogP | 1.22 |
| Additional Property | 3 (vs air) |
| Vapor Pressure | 4.2±0.5 mmHg at 25°C |
| Refractive Index | 1.405 |
| Additional Property | 25 g/L (20 ºC) |
GHS Safety & Compliance
- H226 — Flammable liquid and vapour
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H332 — Harmful if inhaled
- H335 — May cause respiratory irritation
Customs & Trade Information
| HS Code | 2905199090 |
|---|---|
| Summary | 2905199090. saturated monohydric alcohols. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:5.5%. General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of 3-Methyl-1-butanol?
The CAS number of 3-Methyl-1-butanol is 123-51-3.
What are the molecular formula and molecular weight of 3-Methyl-1-butanol?
3-Methyl-1-butanol has molecular formula C5H12O and molecular weight 88.148 g/mol.
Is 3-Methyl-1-butanol hazardous?
3-Methyl-1-butanol has GHS signal word Warning and hazard statements H226 — Flammable liquid and vapour; H315 — Causes skin irritation; H319 — Causes serious eye irritation.
What are the upstream and downstream products of 3-Methyl-1-butanol?
For 3-Methyl-1-butanol, Upstream Products: 3-Methyl-3-buten-1-ol, 4,4-Dimethyl-1,3-dioxane, 3-Methyl-2-buten-1-ol; Downstream Products: 4-Amino-2,2,6,6-tetramethylpiperidine, 1,2-Dimethylpropylamine, Diisoamylamine.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "3-Methyl-1-butanol (CAS 123-51-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1328536-8 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.