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CAS 142-64-3

CAS 142-64-3 matches 1 EU annex record across Annex II–VI of Regulation 1223/2009.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 142-64-3
CAS 142-64-3PubChem CID 8893

Piperazine Dihydrochloride

IUPAC name
piperazine;dihydrochloride
Molecular formula
C4H12Cl2N2
Molecular weight
159.05 g/mol
Exact mass
158.0377538 Da
Topological polar surface area
24.1 Ų
Hydrogen-bond donors
4
Hydrogen-bond acceptors
2
Covalent units
3
Defined stereocentres
0

Also known as

Dowzene DHCPiperazine, dihydrochloridePiperazine wormer premixDihydro Pip WormerDiethylenediamine dihydrochlorideAscarex DDihydrochloride salt of diethylenediamine17VU4Z4W88
16 more reported names
Piperazine, hydrochloride (1:2)RefChem:58255205-551-2Piperazine dihydrochloride [USP]Piperazinium chlorideCaswell No. 668HSDB 1182EINECS 205-551-2EPA Pesticide Chemical Code 067401UNII-17VU4Z4W88Piperazinium dichlorideOlaparib Impurity 72 2HClpiperazine-1,4-diium chlorideTox21_302343Piperazine--hydrogen chloride (1/2)GS-5897
Open full PubChem recordPubChem annotations3D structure image
External database identifiers

Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Records for CAS 142-64-3

1 total
No records found for this CAS number.

How CAS 142-64-3 is used on this site

CAS 142-64-3 is the Chemical Abstracts Service identifier used to pin this page to a specific substance. In the current dataset, 1 EU annex record shares this identifier, which helps you cross-check whether the same substance appears under one regulatory context or several.

Use this page when a supplier specification, SDS or raw-material dossier gives you CAS 142-64-3 and you need to see every linked Annex II–VI record in one place. The entry cards above are the quickest route to concentration limits, warnings, annex placement and product-type conditions.