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Dibutyl sulfide

Also known as: n-Dibutyl sulfide, 1,1'-sulfanediyldibutane, 1-(Butylsulfanyl)butane, 1-butylsulfanylbutane, Butane, 1,1'-thiobis-, Dibutyl sulphide, Dibutyl thioether, EINECS 208-870-5, MFCD00009468, Sulfide, n-butyl-, di-n-butyl sulfide, di-n-butylsulfide, n-Butyl sulfide, n-dibutyl sulphide, sulfide, dibutyl, FEMA 2215, BUTYL SULFIDE, 5-Thianonane

Dibutyl sulfide (CAS 544-40-1) is a compound in the Ethers category listed in the Jingsj chemical database. It has the molecular formula C8H18S and a molecular weight of 146.294 g/mol. Key properties include a melting point of −76 °C(lit.), a boiling point of 188.7±8.0 °C at 760 mmHg, a density of 0.8±0.1 g/cm3 and a flash point of 76.7±0.0 °C. It is classified under GHS with signal word Warning and hazard statements H315 — Causes skin irritation, H319 — Causes serious eye irritation and H335 — May cause respiratory irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
544-40-1
Jingsj CID
J-30156-5
Molecular Formula
C8H18S
Molecular Weight
146.294 g/mol
Category
Ethers
Last updated
8/21/2026

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Physicochemical Properties

Melting Point−76 °C(lit.)
Boiling Point188.7±8.0 °C at 760 mmHg
Density0.8±0.1 g/cm3
Flash Point76.7±0.0 °C
Exact Mass146.112915
PSA25.30000
LogP4.07
Additional Property5.07 (vs air)
Vapor Pressure0.8±0.3 mmHg at 25°C
Refractive Index1.452

GHS Safety & Compliance

IrritantSignal word: Warning
  • H315 — Causes skin irritation
  • H319 — Causes serious eye irritation
  • H335 — May cause respiratory irritation

Customs & Trade Information

HS Code2930909090
Summary2930909090. other organo-sulphur compounds. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:30.0%

Frequently Asked Questions

What is the CAS number of Dibutyl sulfide?

The CAS number of Dibutyl sulfide is 544-40-1.

What are the molecular formula and molecular weight of Dibutyl sulfide?

Dibutyl sulfide has molecular formula C8H18S and molecular weight 146.294 g/mol.

Is Dibutyl sulfide hazardous?

Dibutyl sulfide has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H335 — May cause respiratory irritation.

What are the upstream and downstream products of Dibutyl sulfide?

For Dibutyl sulfide, Upstream Products: 1-Bromobutane, 1-Iodobutane, butanethiol; Downstream Products: 1,4-Dithiane, 1-Bromobutane, Ethanethioic acid, S-butyl ester.

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

Last updated:

How to cite: Jingsj. "Dibutyl sulfide (CAS 544-40-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-30156-5 (accessed 2026-11-06).

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