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CAS 1 record

CAS 55-56-1

CAS 55-56-1 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 55-56-1
CAS 55-56-1PubChem CID 9552079

Chlorhexidine

Chlorhexidine is a bisbiguanide compound with a structure consisting of two (p-chlorophenyl)guanide units linked by a hexamethylene bridge. It has a role as an antibacterial agent and an antiinfective agent. It is a member of biguanides and a member of monochlorobenzenes. It is functionally related to a biguanide. — ChEBI

IUPAC name
(1E)-2-[6-[[amino-[(E)-[amino-(4-chloroanilino)methylidene]amino]methylidene]amino]hexyl]-1-[amino-(4-chloroanilino)methylidene]guanidine
Molecular formula
C22H30Cl2N10
Molecular weight
505.4 g/mol
Exact mass
504.2031964 Da
XLogP3
0.1
Topological polar surface area
178.0 Ų
Hydrogen-bond donors
6
Hydrogen-bond acceptors
2
Covalent units
1
Defined stereocentres
0

Also known as

HexadolSoretolFimeilSterilonTubulicidChlorhexidinumChlorhexidinClorhexidina
16 more reported names
CloresidinaNolvasanMerfen-incoloreChlorhexadineDentisept1,6-Bis(p-chlorophenyldiguanido)hexane1,6-Di(4'-chlorophenyldiguanido)hexane1,6-Bis(5-(p-chlorophenyl)biguandino)hexane1,1'-Hexamethylene bis(5-(p-chlorophenyl)biguanide)R4KO0DY52LCHEBI:36141,6-Di(N-p-chlorophenyldiguanido)hexane2,4,11,13-Tetraazatetradecanediimidamide, N,N''-bis(4-chlorophenyl)-3,12-diimino-N,N'-Bis(4-chlorophenyl)-3,12-diimino-2,4,11,13-tetraazatetradecanediimidamideN-(4-chlorophenyl)-1-3-(6-{N-[3-(4-chlorophenyl)carbamimidamidomethanimidoyl]amino}hexyl)carbamimidamidomethanimidamideclorexidina
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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 55-56-1

1 total
No records found for this CAS number.

How CAS 55-56-1 is used on this site

CAS 55-56-1 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 55-56-1 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.