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1,2-dichlorobutane

Also known as: 1,2-DICHLOROBUTANE, 1,2-Dichlor-butan, 1,2-Dichloro-n-butane, Butane, 1,2-dichloro-, EINECS 210-469-5, MFCD00013676, α-Butylene chloride

1,2-dichlorobutane (CAS 616-21-7) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C4H8Cl2 and a molecular weight of 127.01200 g/mol. Key properties include a boiling point of 125 °C(lit.), a density of 1.112 g/mL at 25 °C(lit.) and a flash point of 26.7 °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 Nov 2, 2026.

CAS No.
616-21-7
Jingsj CID
J-1400658-7
Molecular Formula
C4H8Cl2
Molecular Weight
127.01200 g/mol
Category
Aliphatic Hydrocarbons
Last updated
11/2/2026
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Physicochemical Properties

Boiling Point125 °C(lit.)
Density1.112 g/mL at 25 °C(lit.)
Flash Point26.7 °C
Exact Mass126.00000
LogP2.24260
Vapor Pressure28 mm Hg ( 32 °C)
Refractive Indexn20/D 1.445(lit.)

GHS Safety & Compliance

Flammable / IrritantSignal word: Warning
  • H226 — Flammable liquid and vapour
  • H315 — Causes skin irritation
  • H319 — Causes serious eye irritation
  • H335 — May cause respiratory irritation

Frequently Asked Questions

What is the CAS number of 1,2-dichlorobutane?

The CAS number of 1,2-dichlorobutane is 616-21-7.

What are the molecular formula and molecular weight of 1,2-dichlorobutane?

1,2-dichlorobutane has molecular formula C4H8Cl2 and molecular weight 127.01200 g/mol.

Is 1,2-dichlorobutane hazardous?

1,2-dichlorobutane has GHS signal word Warning and hazard statements H226 — Flammable liquid and vapour; H315 — Causes skin irritation; H319 — Causes serious eye irritation.

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

Last updated:

How to cite: Jingsj. "1,2-dichlorobutane (CAS 616-21-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1400658-7 (accessed 2026-11-09).

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