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Pharmacopeial Impurities (EP / USP / BP)

Sulfamethoxazole EP Impurity A

Reference StandardAvailable on request

Order Sulfamethoxazole EP Impurity A (CAS 21312-10-7) online at Zemixal. Request a quote with price, lead time and documents.

Pack sizes
Sulfamethoxazole EP Impurity A chemical structure
CAS number21312-10-7
FormulaC12H13N3O4S
Molar mass295.32 g/mol
Physical formSolid
HS code38229090
InChIKeyGXPIUNZCALHVBA-UHFFFAOYSA-N
IUPAC nameN-[4-[(5-methyl-1,2-oxazol-3-yl)sulfamoyl]phenyl]acetamide

About Sulfamethoxazole EP Impurity A

Analytical teams working on Sulfamethoxazole use Sulfamethoxazole EP Impurity A as a qualified comparison standard. For your records (Reference Standard), the material is defined by CAS 21312-10-7, formula C12H13N3O4S and molar mass 295.32 g/mol. It is handled as a solid.

Common uses in the lab and plant

  • 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 and H341. 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. Add it to your quote list and our team replies with price, lead time and shipping options within one business day.

Reference standards for Sulfamethoxazole

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

Sulfamethoxazole 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 Sulfamethoxazole EP Impurity A
Product nameSulfamethoxazole EP Impurity A
Catalogue numberZX-027042
CAS number21312-10-7
IUPAC nameN-[4-[(5-methyl-1,2-oxazol-3-yl)sulfamoyl]phenyl]acetamide
Molecular formulaC12H13N3O4S
Molar mass295.32 g/mol
Exact mass295.0627
GradeReference Standard
Physical formSolid
XLogP30.7
H-bond donors / acceptors2 / 6
Topological polar surface area110 Ų
HS code38229090
InChIKeyGXPIUNZCALHVBA-UHFFFAOYSA-N
SMILESCC1=CC(=NO1)NS(=O)(=O)C2=CC=C(C=C2)NC(=O)C
PubChem CID65280
SynonymsSulfamethoxazole Related Compound A, Sulfamethoxazole - Impurity A, N(4)-Acetylsulfamethoxazole, N(4)-acetylsulphamethoxazole, N-(4-(((5-Methyl-3-isoxazolyl)amino)sulfonyl)phenyl)acetamide, N-(4-{[(5-methyl-3-isoxazolyl)amino]sulfonyl}phenyl)acetamide, N4-Acetylsulfamethoxazole, N-Acetyl sulfamethoxazole, N-(4-(N-(5-Methylisoxazol-3-yl)sulfamoyl)phenyl)acetamide, N-acetylsulfamethoxazole, SMX-acetate, 4-Acetylamino-N-(5-methyl-3-isoxazolyl)benzenesulfonamide

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
  • H341Suspected of causing genetic defects

Precautionary statements P203, P264, P270, P280, P301 + P317, P318, P330, P405, 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 Sulfamethoxazole 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 Sulfamethoxazole EP Impurity A

Which CAS number identifies Sulfamethoxazole EP Impurity A?
Sulfamethoxazole EP Impurity A is registered under CAS 21312-10-7. You may also see it listed as Sulfamethoxazole Related Compound A, Sulfamethoxazole - Impurity A, N(4)-Acetylsulfamethoxazole. Our catalogue number for this item is ZX-027042.
What are the formula and molar mass of Sulfamethoxazole EP Impurity A?
For Sulfamethoxazole EP Impurity A, its formula is C12H13N3O4S and its molar mass is 295.32 g/mol. The systematic (IUPAC) name is N-[4-[(5-methyl-1,2-oxazol-3-yl)sulfamoyl]phenyl]acetamide. InChIKey GXPIUNZCALHVBA-UHFFFAOYSA-N lets you match it in any structure database.
How is Sulfamethoxazole EP Impurity A used in pharmaceutical QC?
Sulfamethoxazole EP Impurity A is a characterised reference material linked to Sulfamethoxazole. 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 Sulfamethoxazole 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 Sulfamethoxazole 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 Sulfamethoxazole EP Impurity A to my country?
Yes. Because Sulfamethoxazole 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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