4-Methylamino antipyrine hydrochloride

Also known as: Metamizole Impurity C (4-Methylaminoantipyrine) HCl, Antipyrine, 4-(methylamino)-, hydrochloride, Metamizole Impurity C

4-Methylamino antipyrine hydrochloride (CAS 856307-27-2) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C12H16ClN3O and a molecular weight of 253.72800 g/mol. It is listed by 1 supplier, from 10,000.00 to 10,000.00 CNY per 0.1g. Record last updated Nov 2, 2026.

CAS No.: 856307-27-2
Jingsj CID: J-1135601-7
Molecular Formula: C₁₂H₁₆ClN₃O
Molecular Weight: 253.72800 g/mol
Category: Organic Acids
Last updated: 11/2/2026

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Supplier	Purity / Pack	Base Price	Unit Price	Origin
Maikuo Made to Order	99% 0.1g	¥1,000.00	$1,496.44 /gBest ¥10,000.00/g CNY	CN China MOQ 0.1g	View Product

Physicochemical Properties

Exact Mass	253.09800
PSA	38.96000
LogP	2.40110
InChIKey	NNONRTWOIVTAHL-UHFFFAOYSA-N
SMILES	CNc1c(C)n(C)n(-c2ccccc2)c1=O.Cl

Activity & Biological Data

Additional Information	COX[2][3]
Additional Information	[1]. Burmańczuk A, et al. Pharmacokinetic investigations of the marker active metabolites 4-methylamino-antipyrine and 4-amino-antipyrine after intramuscular injection of metamizole in healthy piglets. J Vet Pharmacol Ther. 2016 Dec;39(6):616-620. [2]. Campos C1, et al. Regulation of cyclooxygenase activity by metamizol. Eur J Pharmacol. 1999 Aug 13;378(3):339-47. [3]. Ariza A, et al. Pyrazolones metabolites are relevant for identifying selective anaphylaxis to metamizole. Sci Rep. 2016 Mar 31;6:23845.

Additional Information

COX[2][3]

Additional Information

[1]. Burmańczuk A, et al. Pharmacokinetic investigations of the marker active metabolites 4-methylamino-antipyrine and 4-amino-antipyrine after intramuscular injection of metamizole in healthy piglets. J Vet Pharmacol Ther. 2016 Dec;39(6):616-620. [2]. Campos C1, et al. Regulation of cyclooxygenase activity by metamizol. Eur J Pharmacol. 1999 Aug 13;378(3):339-47. [3]. Ariza A, et al. Pyrazolones metabolites are relevant for identifying selective anaphylaxis to metamizole. Sci Rep. 2016 Mar 31;6:23845.

Frequently Asked Questions

What is the CAS number of 4-Methylamino antipyrine hydrochloride?

The CAS number of 4-Methylamino antipyrine hydrochloride is 856307-27-2.

What are the molecular formula and molecular weight of 4-Methylamino antipyrine hydrochloride?

4-Methylamino antipyrine hydrochloride has molecular formula C12H16ClN3O and molecular weight 253.72800 g/mol.

Which suppliers offer 4-Methylamino antipyrine hydrochloride?

1 supplier(s) listed; reference unit price ¥10000.00–10000.00 /g.

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

Last updated: 11/2/2026

How to cite: Jingsj. "4-Methylamino antipyrine hydrochloride (CAS 856307-27-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1135601-7 (accessed 2026-11-06).

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