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Pharmacopeial Impurities (EP / USP / BP)

Trimethoprim EP Impurity A

Reference StandardAvailable on request

Buy Trimethoprim EP Impurity A (CAS 213745-86-9) from Zemixal. Request a quote with price, lead time and documents. Catalogue no. ZX-027427.

Pack sizes
Trimethoprim EP Impurity A chemical structure
CAS number213745-86-9
FormulaC15H20N4O3
Molar mass304.34 g/mol
Physical formSolid
HS code38229090
InChIKeyLCMRPHMVLYACMM-UHFFFAOYSA-N
IUPAC name2-N-methyl-5-[(3,4,5-trimethoxyphenyl)methyl]pyrimidine-2,4-diamine

About Trimethoprim EP Impurity A

Trimethoprim EP Impurity A is supplied by Zemixal as a characterised reference material for Trimethoprim analysis. Identity at a glance (Reference Standard): CAS 213745-86-9, formula C15H20N4O3 and molar mass 304.34 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

Handling and storage

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

Order it in 10 mg, 25 mg, 50 mg and 100 mg packs or ask for a bulk quotation. You receive a certificate of analysis with characterisation data with each order. Add it to your quote list and our team replies with price, lead time and shipping options within one business day.

Reference standards for Trimethoprim

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

Trimethoprim 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 Trimethoprim EP Impurity A
Product nameTrimethoprim EP Impurity A
Catalogue numberZX-027427
CAS number213745-86-9
IUPAC name2-N-methyl-5-[(3,4,5-trimethoxyphenyl)methyl]pyrimidine-2,4-diamine
Molecular formulaC15H20N4O3
Molar mass304.34 g/mol
Exact mass304.1535
GradeReference Standard
Physical formSolid
XLogP31.6
H-bond donors / acceptors2 / 7
Topological polar surface area91.5 Ų
HS code38229090
InChIKeyLCMRPHMVLYACMM-UHFFFAOYSA-N
SMILESCNC1=NC=C(C(=N1)N)CC2=CC(=C(C(=C2)OC)OC)OC
PubChem CID44296584
SynonymsTrimethoprim - Impurity A, 2-Desamino-2-methylamino trimethoprim, 4-Amino-2-methylamino-5-(3,4,5-trimethoxybenzyl)pyrimidine, 2,4-Pyrimidinediamine, N2-methyl-5-((3,4,5-trimethoxyphenyl)methyl)-, N2-Methyl-5-((3,4,5-trimethoxyphenyl)methyl)-2,4-pyrimidinediamine, Trimethoprim Impurity A, N2-Methyl Trimethoprim (Impurity), N2-Methyl-5-(3,4,5-trimethoxybenzyl)pyrimidine-2,4-diamine, N*2*-Methyl-5-(3,4,5-trimethoxy-benzyl)-pyrimidine-2,4-diamine

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

Signal word Warning

  • H302Harmful if swallowed

Precautionary statements P264, P270, P301 + P317, P330, 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 Trimethoprim EP Impurity A
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 Trimethoprim EP Impurity A

Which CAS number identifies Trimethoprim EP Impurity A?
Trimethoprim EP Impurity A is registered under CAS 213745-86-9. You may also see it listed as Trimethoprim - Impurity A, 2-Desamino-2-methylamino trimethoprim, 4-Amino-2-methylamino-5-(3,4,5-trimethoxybenzyl)pyrimidine. Our catalogue number for this item is ZX-027427.
What are the formula and molar mass of Trimethoprim EP Impurity A?
For Trimethoprim EP Impurity A, its formula is C15H20N4O3 and its molar mass is 304.34 g/mol. The systematic (IUPAC) name is 2-N-methyl-5-[(3,4,5-trimethoxyphenyl)methyl]pyrimidine-2,4-diamine. InChIKey LCMRPHMVLYACMM-UHFFFAOYSA-N lets you match it in any structure database.
How is Trimethoprim EP Impurity A used in pharmaceutical QC?
Trimethoprim EP Impurity A is a characterised reference material linked to Trimethoprim. 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 Trimethoprim EP Impurity A?
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 Trimethoprim EP Impurity A?
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 Trimethoprim EP Impurity A to my country?
Yes. Because Trimethoprim EP Impurity A 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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