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Pharmacopeial Impurities (EP / USP / BP)

Pyrimethamine EP Impurity B

Reference StandardAvailable on request

Order Pyrimethamine EP Impurity B (CAS 3275-44-3) online at Zemixal. Request a quote with price, lead time and documents.

Pack sizes
Pyrimethamine EP Impurity B chemical structure
CAS number3275-44-3
FormulaC11H11ClN4
Molar mass234.68 g/mol
Physical formSolid
HS code38229090
InChIKeySNBBQZGVKQEBQT-UHFFFAOYSA-N
IUPAC name5-(4-chlorophenyl)-6-methylpyrimidine-2,4-diamine

About Pyrimethamine EP Impurity B

Pyrimethamine EP Impurity B belongs to the Pyrimethamine reference-standard family in the Zemixal catalogue. Key data (Reference Standard): CAS 3275-44-3, formula C11H11ClN4 and molar mass 234.68 g/mol. It is handled as a solid.

Use cases we see most often

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

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. Add it to your quote list and our team replies with price, lead time and shipping options within one business day.

Reference standards for Pyrimethamine

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

Pyrimethamine 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 Pyrimethamine EP Impurity B
Product namePyrimethamine EP Impurity B
Catalogue numberZX-031093
CAS number3275-44-3
IUPAC name5-(4-chlorophenyl)-6-methylpyrimidine-2,4-diamine
Molecular formulaC11H11ClN4
Molar mass234.68 g/mol
Exact mass234.0672
GradeReference Standard
Physical formSolid
XLogP32.3
H-bond donors / acceptors2 / 4
Topological polar surface area77.8 Ų
HS code38229090
InChIKeySNBBQZGVKQEBQT-UHFFFAOYSA-N
SMILESCC1=C(C(=NC(=N1)N)N)C2=CC=C(C=C2)Cl
PubChem CID134531
SynonymsPyrimethamine - Impurity B, Pyrimidine, 2,4-diamino-5-(p-chlorophenyl)-6-methyl-, 2,4-Pyrimidinediamine, 5-(4-chlorophenyl)-6-methyl-, 2,4-Diamino-5-(p-chlorophenyl)-6-methylpyrimidine, 5-(4-Chlorophenyl)-2,4-diamino-6-methylpyrimidine, Pyrimethamine Impurity 3, 5-(4-chlorophenyl)-6-methyl-pyrimidine-2,4-diamine, 5-(4-Chlorophenyl)-6-methylpyrimidine-2,4(1H,3H)-diimine

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

Safety and GHS hazards

No GHS classification is on file for this item. Handle it as an unknown laboratory chemical and request the SDS with your quotation.

Pack sizes

Pack sizes of Pyrimethamine EP Impurity B
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 Pyrimethamine EP Impurity B

Which CAS number identifies Pyrimethamine EP Impurity B?
Pyrimethamine EP Impurity B is registered under CAS 3275-44-3. You may also see it listed as Pyrimethamine - Impurity B, Pyrimidine, 2,4-diamino-5-(p-chlorophenyl)-6-methyl-, 2,4-Pyrimidinediamine, 5-(4-chlorophenyl)-6-methyl-. Our catalogue number for this item is ZX-031093.
What are the formula and molar mass of Pyrimethamine EP Impurity B?
For Pyrimethamine EP Impurity B, its formula is C11H11ClN4 and its molar mass is 234.68 g/mol. The systematic (IUPAC) name is 5-(4-chlorophenyl)-6-methylpyrimidine-2,4-diamine. InChIKey SNBBQZGVKQEBQT-UHFFFAOYSA-N lets you match it in any structure database.
How is Pyrimethamine EP Impurity B used in pharmaceutical QC?
Pyrimethamine EP Impurity B is a characterised reference material linked to Pyrimethamine. 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 Pyrimethamine EP Impurity B?
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 Pyrimethamine EP Impurity B?
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 Pyrimethamine EP Impurity B to my country?
Yes. Pyrimethamine EP Impurity B ships worldwide by express courier, air cargo or sea freight, quoted on the Incoterm you prefer, with full export documents.

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