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Pharmacopeial Impurities (EP / USP / BP)

Allopurinol EP Impurity E

Reference StandardAvailable on request

Allopurinol EP Impurity E (CAS 31055-19-3) supplier Zemixal. Lab and bulk packs, batch COA, fast global delivery. Catalogue no. ZX-020548.

Pack sizes
Allopurinol EP Impurity E chemical structure
CAS number31055-19-3
FormulaC7H9N3O3
Molar mass183.16 g/mol
Physical formSolid
HS code38229090
InChIKeyVAEIHNPPOAVFAR-UHFFFAOYSA-N
IUPAC nameethyl 5-formamido-1H-pyrazole-4-carboxylate

About Allopurinol EP Impurity E

Allopurinol EP Impurity E is supplied by Zemixal as a characterised reference material for Allopurinol analysis. For your records (Reference Standard), the material is defined by CAS 31055-19-3, formula C7H9N3O3 and molar mass 183.16 g/mol. It is handled as a solid.

Where it is used

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

Storage and safety notes

It carries the GHS signal word Warning (H302 and H411), so wear gloves and eye protection and work with good ventilation.

Order it in 10 mg, 25 mg, 50 mg and 100 mg packs or ask for a bulk quotation. Each lot travels with a certificate of analysis with characterisation data. Request pricing online and we confirm availability, documentation and freight to your country.

Reference standards for Allopurinol

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

Allopurinol 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 Allopurinol EP Impurity E
Product nameAllopurinol EP Impurity E
Catalogue numberZX-020548
CAS number31055-19-3
IUPAC nameethyl 5-formamido-1H-pyrazole-4-carboxylate
Molecular formulaC7H9N3O3
Molar mass183.16 g/mol
Exact mass183.0644
GradeReference Standard
Physical formSolid
XLogP30.5
H-bond donors / acceptors2 / 4
Topological polar surface area84.1 Ų
HS code38229090
InChIKeyVAEIHNPPOAVFAR-UHFFFAOYSA-N
SMILESCCOC(=O)C1=C(NN=C1)NC=O
PubChem CID13926581
SynonymsAllopurinol - Impurity E, allopurinol USP rc e, Ethyl 5-(formylamino)-1H-pyrazole-4-carboxylate, Allopurinol Impurity E, Pyrazole-4-carboxylic acid, 3-formamido-, ethyl ester, 1H-Pyrazole-4-carboxylic acid, 3-(formylamino)-, ethyl ester, 3-(Formylamino)-1H-pyrazole-4-carboxylic Acid Ethyl Ester, 3-formamido-4-ethoxycarbonylpyrazole

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
GHS09 Hazardous to the environment
Hazardous to the environment

Signal word Warning

  • H302Harmful if swallowed
  • H411Toxic to aquatic life with long lasting effects

Precautionary statements P264, P270, P273, P301 + P317, P330, P391, 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 Allopurinol 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 Allopurinol EP Impurity E

Which CAS number identifies Allopurinol EP Impurity E?
Allopurinol EP Impurity E is registered under CAS 31055-19-3. You may also see it listed as Allopurinol - Impurity E, allopurinol USP rc e, Ethyl 5-(formylamino)-1H-pyrazole-4-carboxylate. Our catalogue number for this item is ZX-020548.
What are the formula and molar mass of Allopurinol EP Impurity E?
For Allopurinol EP Impurity E, its formula is C7H9N3O3 and its molar mass is 183.16 g/mol. The systematic (IUPAC) name is ethyl 5-formamido-1H-pyrazole-4-carboxylate. InChIKey VAEIHNPPOAVFAR-UHFFFAOYSA-N lets you match it in any structure database.
How is Allopurinol EP Impurity E used in pharmaceutical QC?
Allopurinol EP Impurity E is a characterised reference material linked to Allopurinol. 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 Allopurinol 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 Allopurinol 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 Allopurinol EP Impurity E to my country?
Yes. Because Allopurinol 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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