Metamizole EP Impurity C

Name: Metamizole EP Impurity C
Brand: Vaqora Chemicals
SKU: VQ-023084

About Metamizole EP Impurity C

Listed under CAS 519-98-2, Metamizole EP Impurity C is a pharmacopeial impurity of Metamizole available from Vaqora Chemicals. The compound has the formula C12H15N3O, corresponding to a molecular weight of 217.27 g/mol. Systematically, it is named 1,5-dimethyl-4-(methylamino)-2-phenylpyrazol-3-one. Common synonyms include 4-Methylamino Antipyrine and Metamizole Sodium - Impurity C (Freebase).

It is supplied as a solid. Store the standard in its sealed vial, protected from light and moisture, and follow the storage condition printed on the COA. Under GHS it is labelled “Warning”, so handle it with suitable PPE and consult the SDS.

This Metamizole impurity supports analytical method development and validation (AMV), batch release testing and the impurity sections of ANDA and DMF filings. It is used across pharmaceutical manufacturing and academic and industrial research.

Vaqora Chemicals supplies Metamizole EP Impurity C in 10 mg, 25 mg, 50 mg and 100 mg packs, each shipped with a Certificate of Analysis (COA), and exports worldwide.

Typical applications

Pharmacopeial method verification
Impurity profiling
QC release testing
ANDA / DMF filings

Industries

Related to Metamizole

View every impurity, metabolite and intermediate we list for Metamizole.

Metamizole impurities

Grade guides

Specifications & identifiers

Chemical identifiers
Product name	Metamizole EP Impurity C
Catalogue No.	VQ-023084
CAS Number	519-98-2
IUPAC name	1,5-dimethyl-4-(methylamino)-2-phenylpyrazol-3-one
Molecular formula	C₁₂H₁₅N₃O
Molecular weight	217.27 g/mol
Exact mass	217.1215
Grade	Reference Standard
HSN code	38229090
InChIKey	JILCEWWZTBBOFS-UHFFFAOYSA-N
SMILES	CC1=C(C(=O)N(N1C)C2=CC=CC=C2)NC
PubChem CID	10618

Physical properties
Physical form	Solid
LogP (XLogP3)	0.8
H-bond donors / acceptors	1 / 3
TPSA	35.6 Å²
Synonyms	4-Methylamino Antipyrine, Metamizole Sodium - Impurity C (Freebase), Noramidopyrine, Noraminopyrine, 4-methylaminoantipyrine, 4-Methylaminophenazone, 4-(Methylamino)antipyrine, 1,5-Dimethyl-4-(methylamino)-2-phenyl-1,2-dihydro-3H-pyrazol-3-one, Methylaminoantipyrine, 4-Monomethylaminoantipyrine, Monomethylaminoantipyrine, 4-Monomethylaminophenazone

Safety & hazard information (GHS)

Harmful / irritant

Signal word: Warning

Hazard statements

H302Harmful if swallowed

Precautionary statements: P264, P270, P301 + P317, P330, P501

Classification is indicative (aggregated GHS notifications) and may vary by grade and concentration. Always refer to the SDS supplied with your lot.

Documents

Safety Data Sheet (SDS)16-section GHS · on request Certificate of AnalysisTypical / batch COA · on request Specification sheetTDS / MOA · on request

Frequently asked questions

What is the CAS number of Metamizole EP Impurity C?

The CAS Registry Number of Metamizole EP Impurity C is 519-98-2. It is also known as 4-Methylamino Antipyrine, Metamizole Sodium - Impurity C (Freebase), Noramidopyrine.

What is the molecular formula and molecular weight of Metamizole EP Impurity C?

Metamizole EP Impurity C has the molecular formula C12H15N3O and a molecular weight of 217.27 g/mol. Its IUPAC name is 1,5-dimethyl-4-(methylamino)-2-phenylpyrazol-3-one.

What is Metamizole EP Impurity C used for?

Metamizole EP Impurity C is supplied as a characterised reference material related to Metamizole. It is used for analytical method development and validation (AMV), impurity profiling, stability studies and quality control, and in ANDA/DMF regulatory filings.

Which grade and pack sizes of Metamizole EP Impurity C can I order?

We supply Metamizole EP Impurity C in Reference Standard grade, in 10 mg, 25 mg, 50 mg, 100 mg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Metamizole EP Impurity C?

Yes. Every lot of Metamizole EP Impurity C is shipped with a batch-specific Certificate of Analysis, and a 16-section GHS Safety Data Sheet is provided with the quotation and the shipment.

Can Metamizole EP Impurity C be shipped internationally?

Yes. Metamizole EP Impurity C is classified as hazardous, so it is packed in UN-approved packaging and shipped as dangerous goods under IATA/IMDG rules. We export worldwide on EXW, FOB, CIF and DAP terms.