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Piperazine dihydrochloride

Also known as: Piperazine hydrochloride, Piperazinium dichloride, Diethylenediamine dihydrochloride, Dowzene DHC, Piperazine di HCl

Piperazine dihydrochloride (CAS 142-64-3) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C4H12Cl2N2 and a molecular weight of 159.05700 g/mol. Key properties include a melting point of 248-250, a boiling point of 149.3ºC at 760 mmHg, a density of 1.92g/cm3 and a flash point of 49.7ºC. It is classified under GHS with signal word Danger and hazard statements H315 — Causes skin irritation, H317 — May cause an allergic skin reaction and H319 — Causes serious eye irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
142-64-3
Jingsj CID
J-1116254-2
Molecular Formula
C4H12Cl2N2
Molecular Weight
159.05700 g/mol
Category
Organic Acids
Last updated
8/21/2026
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Physicochemical Properties

Melting Point248-250
Boiling Point149.3ºC at 760 mmHg
Density1.92g/cm3
Flash Point49.7ºC
Exact Mass158.03800
PSA24.06000
LogP1.44080

GHS Safety & Compliance

Health HazardSignal word: Danger
  • H315 — Causes skin irritation
  • H317 — May cause an allergic skin reaction
  • H319 — Causes serious eye irritation
  • H334 — May cause allergy or asthma symptoms if inhaled
  • H412 — Harmful to aquatic life with long lasting effects

Frequently Asked Questions

What is the CAS number of Piperazine dihydrochloride?

The CAS number of Piperazine dihydrochloride is 142-64-3.

What are the molecular formula and molecular weight of Piperazine dihydrochloride?

Piperazine dihydrochloride has molecular formula C4H12Cl2N2 and molecular weight 159.05700 g/mol.

Is Piperazine dihydrochloride hazardous?

Piperazine dihydrochloride has GHS signal word Danger and hazard statements H315 — Causes skin irritation; H317 — May cause an allergic skin reaction; H319 — Causes serious eye irritation.

What are the upstream and downstream products of Piperazine dihydrochloride?

For Piperazine dihydrochloride, Upstream Products: Benzyl piperazine-1-carboxylate, 2-(2-Aminoethylamino)ethanol, 1,3-diazepane-2-thione; Downstream Products: 1-Piperonylpiperazine, Ethyl benzoate, 1-Benzoylpiperazine hydrochloride.

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

Last updated:

How to cite: Jingsj. "Piperazine dihydrochloride (CAS 142-64-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1116254-2 (accessed 2026-11-09).

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