Pyrimethamine EP Impurity B

Name: Pyrimethamine EP Impurity B
Brand: Vaqora Chemicals
SKU: VQ-032408

About Pyrimethamine EP Impurity B

Pyrimethamine EP Impurity B is a pharmacopeial impurity of Pyrimethamine carrying the CAS registry number 3275-44-3. Formula C11H11ClN4, molecular weight 234.68 g/mol. The IUPAC name is 5-(4-chlorophenyl)-6-methylpyrimidine-2,4-diamine. Alternative names: Pyrimethamine - Impurity B and Pyrimethamine Impurity 3.

The product is provided as a solid. Keep the vial tightly closed, protected from light and humidity, at the temperature stated on the Certificate of Analysis. Good laboratory practice and suitable PPE are recommended during handling.

This Pyrimethamine 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.

Standard pack sizes are 10 mg, 25 mg, 50 mg and 100 mg, and every batch ships with a Certificate of Analysis (COA) and we export worldwide.

Typical applications

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

Industries

Related to Pyrimethamine

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

Pyrimethamine impurities

Grade guides

Specifications & identifiers

Chemical identifiers
Product name	Pyrimethamine EP Impurity B
Catalogue No.	VQ-032408
CAS Number	3275-44-3
IUPAC name	5-(4-chlorophenyl)-6-methylpyrimidine-2,4-diamine
Molecular formula	C₁₁H₁₁ClN₄
Molecular weight	234.68 g/mol
Exact mass	234.0672
Grade	Reference Standard
HSN code	38229090
InChIKey	SNBBQZGVKQEBQT-UHFFFAOYSA-N
SMILES	CC1=C(C(=NC(=N1)N)N)C2=CC=C(C=C2)Cl
PubChem CID	134531

Physical properties
Physical form	Solid
LogP (XLogP3)	2.3
H-bond donors / acceptors	2 / 4
TPSA	77.8 Å²
Synonyms	Pyrimethamine - 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

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 Pyrimethamine EP Impurity B?

The CAS Registry Number of Pyrimethamine EP Impurity B is 3275-44-3. It is also known as Pyrimethamine - Impurity B, Pyrimidine, 2,4-diamino-5-(p-chlorophenyl)-6-methyl-, 2,4-Pyrimidinediamine, 5-(4-chlorophenyl)-6-methyl-.

What is the molecular formula and molecular weight of Pyrimethamine EP Impurity B?

Pyrimethamine EP Impurity B has the molecular formula C11H11ClN4 and a molecular weight of 234.68 g/mol. Its IUPAC name is 5-(4-chlorophenyl)-6-methylpyrimidine-2,4-diamine.

What is Pyrimethamine EP Impurity B used for?

Pyrimethamine EP Impurity B is supplied as a characterised reference material related to Pyrimethamine. 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 Pyrimethamine EP Impurity B can I order?

We supply Pyrimethamine EP Impurity B 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 Pyrimethamine EP Impurity B?

Yes. Every lot of Pyrimethamine EP Impurity B 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 Pyrimethamine EP Impurity B be shipped internationally?

Yes. We export Pyrimethamine EP Impurity B worldwide by air and sea freight or express courier, on EXW, FOB, CIF, CFR or DAP Incoterms, with full export documentation.