(R)-1,2-Butanediol

Also known as: (2R)-1,2-Butanediol, (2R)-Butane-1,2-diol, (R)-1,2-Butylene Glycol, (R)-1,2-Dihydroxybutane, (R)-Butane-1,2-diol, (R)-(+)-1,2-BUTANEDIOL, 1,2-Butanediol, (2R)-

(R)-1,2-Butanediol (CAS 40348-66-1) is a compound in the Alcohols category listed in the Jingsj chemical database. It has the molecular formula C4H10O2 and a molecular weight of 90.121 g/mol. Key properties include a boiling point of 190.3±8.0 °C at 760 mmHg, a density of 1.0±0.1 g/cm3 and a flash point of 93.3±0.0 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 40348-66-1
Jingsj CID: J-1020586-4
Molecular Formula: C₄H₁₀O₂
Molecular Weight: 90.121 g/mol
Category: Alcohols
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	190.3±8.0 °C at 760 mmHg
Density	1.0±0.1 g/cm3
Flash Point	93.3±0.0 °C
Exact Mass	90.068077
PSA	40.46000
LogP	-0.81
Vapor Pressure	0.1±0.8 mmHg at 25°C
Refractive Index	1.438

Customs & Trade Information

HS Code	2905399090
Summary	2905399090 other diols。supervision conditions:AB(certificate of inspection for goods inward,certificate of inspection for goods outward)。VAT:17.0%。tax rebate rate:9.0%。MFN tariff:5.5%。general tariff:30.0%

Frequently Asked Questions

What is the CAS number of (R)-1,2-Butanediol?

The CAS number of (R)-1,2-Butanediol is 40348-66-1.

What are the molecular formula and molecular weight of (R)-1,2-Butanediol?

(R)-1,2-Butanediol has molecular formula C4H10O2 and molecular weight 90.121 g/mol.

What are the upstream and downstream products of (R)-1,2-Butanediol?

For (R)-1,2-Butanediol, Upstream Products: 1,2-epoxybutane, 1,2-Butanediol, (R)-2-Hydroxybutanoic acid; Downstream Products: 1-Bromo-2-butanol, (S)-(-)-1,2-Epoxybutane, 1,2-epoxybutane.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "(R)-1,2-Butanediol (CAS 40348-66-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1020586-4 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.