4-((Hydroxymethyl)(methyl)amino)-1,5-dimethyl-2-phenyl-1,2-dihydro-3H-pyrazol-3-one
- CAS
- 62902-13-0
- Formula
- C13H17N3O2
- MW
- 247.3 g/mol
VQ-043810
Impurity reference standards
Metamizole impurities & reference standards
Characterised Metamizole impurities, degradation products and related compounds for analytical method development, validation, QC release and regulatory filings.
21reference materials
2isotope-labelled
COAHPLC · NMR · MS on request
![4,4'-[Methylenebis(methylimino)]diantipyrine chemical structure](/media/structures/GEFDLFMKEPTYLA-UHFFFAOYSA-N.svg)
N-(1,5-Dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-yl)-N-methylnitrous amide
- CAS
- 73829-38-6
- Formula
- C12H14N4O2
- MW
- 246.27 g/mol
VQ-023083
N-(2-(Diethylamino)ethyl)-5-((5-fluoro-2-oxoindolin-3-ylidene)methyl)-2,4-dimethyl-1H-pyrrole-3-carboxamide
- CAS
- 342641-94-5
- Formula
- C22H27FN4O2
- MW
- 398.5 g/mol
VQ-042318
N-(5-(Benzylsulfinyl)-3-methyl-1,3,4-thiadiazol-2(3H)-ylidene)acetamide
- CAS
- 2365289-85-4
- Formula
- C12H13N3O2S2
- MW
- 295.4 g/mol
VQ-044432
N-(5-(Methylthio)-1,3,4-thiadiazol-2-yl)acetamide
- CAS
- 38583-51-6
- Formula
- C5H7N3OS2
- MW
- 189.3 g/mol
VQ-031808
N-(5-Methyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-yl)formamide
- CAS
- 106236-80-0
- Formula
- C11H11N3O2
- MW
- 217.22 g/mol
VQ-026623
FAQs — Metamizole impurities
Which Metamizole impurities do you supply?
We list 21 Metamizole-related reference materials, including process impurities, degradation products, stable-isotope-labelled standards and related compounds. Each is supplied with a COA, and characterisation data (HPLC, 1H-NMR, MS, IR) can be provided on request.
What are Metamizole impurity standards used for?
They are used for analytical method development and validation, impurity identification and quantification, forced-degradation and stability studies, and to support ANDA, DMF and other regulatory submissions under ICH Q3A/Q3B (and ICH M7 for mutagenic impurities).
Can you synthesise a Metamizole impurity that is not listed?
Yes. Our custom synthesis service can prepare and characterise unlisted impurities, metabolites and labelled analogues from milligram to gram scale. Share the structure or name and required quantity for a quotation.
Request Metamizole impurity standards
We reply within one business day with price, pack options, lead time and documentation.