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Cetylpyridinium chloride

Also known as: 1-Hexadecylpyridinium chloride, Hexadecylpyridinium chloride, CPC, Ceepryn, Ceepryn chloride, Cetamium, Cetyl pyridinium chloride, N-hexadecylpyridinium chloride, 1-hexadecylpyridin-1-ium chloride, Pyrisept, Dobendan, Biosept, Aktivex, Merocet, Merothol, Medilave, Pristacin, Ipanol

Cetylpyridinium chloride (CAS 123-03-5) is a compound in the Organohalogen Compounds category listed in the Jingsj chemical database. It has the molecular formula C21H38ClN and a molecular weight of 339.986 g/mol. Key property: a melting point of 77°C. It is listed by 1 supplier; request a quote for pricing. Record last updated Aug 21, 2026.

CAS No.
123-03-5
Jingsj CID
J-46069-5
Molecular Formula
C21H38ClN
Molecular Weight
339.986 g/mol
Category
Organohalogen Compounds
Last updated
8/21/2026
Made to Order

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Physicochemical Properties

Melting Point77°C
Exact Mass339.269287
PSA3.88000
LogP3.45940

Activity & Biological Data

TargetIC50: 2.5 μM (HBV capsid assembly)[1]
Additional Information[1]. Hyun Wook Seo, et al. Cetylpyridinium chloride interaction with the hepatitis B virus core protein inhibits capsid assembly. Virus Res. 2019 Apr 2;263:102-111. [2]. Hiroto Imai, et al. Cetylpyridinium chloride at sublethal levels increases the susceptibility of rat thymic lymphocytes to oxidative stress. Chemosphere. 2017 Mar;170:118-123.

Customs & Trade Information

HS Code2933399090
Summary2933399090. other compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

Frequently Asked Questions

What is the CAS number of Cetylpyridinium chloride?

The CAS number of Cetylpyridinium chloride is 123-03-5.

What are the molecular formula and molecular weight of Cetylpyridinium chloride?

Cetylpyridinium chloride has molecular formula C21H38ClN and molecular weight 339.986 g/mol.

Which suppliers offer Cetylpyridinium chloride?

1 supplier(s) listed; request a quote for pricing.

What are the upstream and downstream products of Cetylpyridinium chloride?

For Cetylpyridinium chloride, Upstream Products: Pyridine, 1-Chlorohexadecane; Downstream Products: Citral, Pyridine, 1-Hexadecene.

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

Last updated:

How to cite: Jingsj. "Cetylpyridinium chloride (CAS 123-03-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-46069-5 (accessed 2026-11-07).

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