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Pharmacopeial Impurities (EP / USP / BP)

Metamizole EP Impurity E

Reference StandardAvailable on request

Metamizole EP Impurity E (CAS 117-38-4) supplier Zemixal. Request a quote with price, lead time and documents. Catalogue no. ZX-030520.

Pack sizes
Metamizole EP Impurity E chemical structure
CAS number117-38-4
FormulaC12H15N3O4S
Molar mass297.33 g/mol
Physical formSolid
HS code38229090
InChIKeyVRESBCAKEFFDQB-UHFFFAOYSA-N
IUPAC name[(1,5-dimethyl-3-oxo-2-phenylpyrazol-4-yl)amino]methanesulfonic acid

About Metamizole EP Impurity E

Metamizole EP Impurity E is supplied by Zemixal as a characterised reference material for Metamizole analysis. For your records (Reference Standard), the material is defined by CAS 117-38-4, formula C12H15N3O4S and molar mass 297.33 g/mol. It is handled as a solid.

Where it is used

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

Handling and storage

Classified under GHS with signal word Warning and hazard statements H302, H312 and H332. Read the SDS before first use.

Standard pack sizes are 10 mg, 25 mg, 50 mg and 100 mg, and custom quantities are quoted on request. Every shipment includes a certificate of analysis with characterisation data. Request pricing online and we confirm availability, documentation and freight to your country.

Reference standards for Metamizole

See every impurity, metabolite and related compound we list for this API.

Metamizole standards

Typical uses

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

Applications

Pharmaceutical Manufacturing and QCResearch Labs and Universities

Grade guides

Ph. Eur. Grade (European Pharmacopoeia)

Specifications and identifiers

Specifications of Metamizole EP Impurity E
Product nameMetamizole EP Impurity E
Catalogue numberZX-030520
CAS number117-38-4
IUPAC name[(1,5-dimethyl-3-oxo-2-phenylpyrazol-4-yl)amino]methanesulfonic acid
Molecular formulaC12H15N3O4S
Molar mass297.33 g/mol
Exact mass297.0783
GradeReference Standard
Physical formSolid
XLogP3-0.2
H-bond donors / acceptors2 / 6
Topological polar surface area98.3 Ų
HS code38229090
InChIKeyVRESBCAKEFFDQB-UHFFFAOYSA-N
SMILESCC1=C(C(=O)N(N1C)C2=CC=CC=C2)NCS(=O)(=O)O
PubChem CID19145
SynonymsMetamizole Sodium - Impurity E, Sulfamidopyrine, (Antipyrinylamino)methanesulfonic acid, ((1,5-Dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-yl)amino)methanesulfonic acid, Methanesulfonic acid, (antipyrinylamino)-, [(1,5-Dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-yl)amino]methanesulfonic acid, Methanesulfonic acid, ((2,3-dihydro-1,5-dimethyl-3-oxo-2-phenyl-1H-pyrazol-4-yl)amino)-, Methanesulfonic acid, 1-((2,3-dihydro-1,5-dimethyl-3-oxo-2-phenyl-1H-pyrazol-4-yl)amino)-, [(2,3-Dihydro-1,5-dimethyl-3-oxo-2-phenyl-1H-pyrazol-4-yl)amino]methanesulfonic acid, Melaminsulfone

Lot values are stated on the batch certificate of analysis. Ask for a typical COA with your quotation.

Safety and GHS hazards

GHS07 Irritant or harmful
Irritant or harmful
GHS08 Health hazard
Health hazard

Signal word Warning

  • H302Harmful if swallowed
  • H312Harmful in contact with skin
  • H332Harmful if inhaled

Precautionary statements P261, P264, P270, P271, P280, P301 + P317, P302 + P352, P304 + P340, P317, P321, P330, P362 + P364, P501

Classification summarised from public GHS notifications. It can vary with grade and concentration, so always follow the SDS supplied with your lot.

Pack sizes

Pack sizes of Metamizole EP Impurity E
10 mgQuoted on request
25 mgQuoted on request
50 mgQuoted on request
100 mgQuoted on request

Need a different size? Bulk drums and custom packing are quoted on request through the quote form on this page.

Questions about Metamizole EP Impurity E

Which CAS number identifies Metamizole EP Impurity E?
Metamizole EP Impurity E is registered under CAS 117-38-4. You may also see it listed as Metamizole Sodium - Impurity E, Sulfamidopyrine, (Antipyrinylamino)methanesulfonic acid. Our catalogue number for this item is ZX-030520.
What are the formula and molar mass of Metamizole EP Impurity E?
For Metamizole EP Impurity E, its formula is C12H15N3O4S and its molar mass is 297.33 g/mol. The systematic (IUPAC) name is [(1,5-dimethyl-3-oxo-2-phenylpyrazol-4-yl)amino]methanesulfonic acid. InChIKey VRESBCAKEFFDQB-UHFFFAOYSA-N lets you match it in any structure database.
How is Metamizole EP Impurity E used in pharmaceutical QC?
Metamizole EP Impurity E is a characterised reference material linked to Metamizole. Laboratories use it to identify and quantify this impurity during method development and validation, stability work, batch release testing and regulatory submissions.
What grade and pack sizes are available for Metamizole EP Impurity E?
This listing is Reference Standard grade. Standard packs are 10 mg, 25 mg, 50 mg, 100 mg. Larger quantities and custom packing can be quoted on request.
Which documents come with Metamizole EP Impurity E?
Each lot ships with a batch certificate of analysis and a 16-section GHS safety data sheet. A typical COA or specification sheet can be shared with the quotation before you order.
Can Zemixal ship Metamizole EP Impurity E to my country?
Yes. Because Metamizole EP Impurity E is classed as hazardous, it travels in UN-approved packaging as dangerous goods under IATA or IMDG rules, with the export paperwork your broker needs.

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