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Pharmacopeial Impurities (EP / USP / BP)

Sildenafil EP Impurity B

Reference StandardAvailable on request

Buy Sildenafil EP Impurity B (CAS 1094598-75-0) from Zemixal: C22H30N6O5S, COA and SDS with every lot, worldwide shipping.

Pack sizes
Sildenafil EP Impurity B chemical structure
CAS number1094598-75-0
FormulaC22H30N6O5S
Molar mass490.6 g/mol
Physical formSolid
HS code38229090
InChIKeyJQGFLCMKCZPSEC-UHFFFAOYSA-N
IUPAC name5-[2-ethoxy-5-(4-methyl-4-oxidopiperazin-4-ium-1-yl)sulfonylphenyl]-1-methyl-3-propyl-6H-pyrazolo[4,5-d]pyrimidin-7-one

About Sildenafil EP Impurity B

Analytical teams working on Sildenafil use Sildenafil EP Impurity B as a qualified comparison standard. For your records (Reference Standard), the material is defined by CAS 1094598-75-0, formula C22H30N6O5S and molar mass 490.6 g/mol. It is handled as a solid.

Where it is used

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

Handling and storage

Hazard communication follows GHS (Warning: H302, H315, H317 and H319). Our SDS lists exposure controls and first-aid measures.

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. Send an enquiry through the quote panel and you get a formal offer with Incoterms and delivery time.

Reference standards for Sildenafil

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

Sildenafil 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 Sildenafil EP Impurity B
Product nameSildenafil EP Impurity B
Catalogue numberZX-022766
CAS number1094598-75-0
IUPAC name5-[2-ethoxy-5-(4-methyl-4-oxidopiperazin-4-ium-1-yl)sulfonylphenyl]-1-methyl-3-propyl-6H-pyrazolo[4,5-d]pyrimidin-7-one
Molecular formulaC22H30N6O5S
Molar mass490.6 g/mol
Exact mass490.1998
GradeReference Standard
Physical formSolid
XLogP30.9
H-bond donors / acceptors1 / 8
Topological polar surface area132 Ų
HS code38229090
InChIKeyJQGFLCMKCZPSEC-UHFFFAOYSA-N
SMILESCCCC1=NN(C2=C1N=C(NC2=O)C3=C(C=CC(=C3)S(=O)(=O)N4CC[N+](CC4)(C)[O-])OCC)C
PubChem CID135565954
SynonymsSildenafil-N-Oxide, Sildenafil Citrate - Impurity B, Sildenafil N-Oxide, Sildenafil citrate impurity B, Sildenafil B, Sildenafil N-Oxide Impurity

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
  • H315Causes skin irritation
  • H317May cause an allergic skin reaction
  • H319Causes serious eye irritation
  • H332Harmful if inhaled
  • H336May cause drowsiness or dizziness
  • H361Suspected of damaging fertility or the unborn child
  • H412Harmful to aquatic life with long lasting effects

Precautionary statements P203, P261, P264, P264 + P265, P270, P271, P272, P273, P280, P301 + P317, P302 + P352, P304 + P340, P305 + P351 + P338, P317, P318, P319, P321, P330, P332 + P317, P333 + P317, P337 + P317, P362 + P364, P403 + P233, P405

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 Sildenafil 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 Sildenafil EP Impurity B

Which CAS number identifies Sildenafil EP Impurity B?
Sildenafil EP Impurity B is registered under CAS 1094598-75-0. You may also see it listed as Sildenafil-N-Oxide, Sildenafil Citrate - Impurity B, Sildenafil N-Oxide. Our catalogue number for this item is ZX-022766.
What are the formula and molar mass of Sildenafil EP Impurity B?
For Sildenafil EP Impurity B, its formula is C22H30N6O5S and its molar mass is 490.6 g/mol. The systematic (IUPAC) name is 5-[2-ethoxy-5-(4-methyl-4-oxidopiperazin-4-ium-1-yl)sulfonylphenyl]-1-methyl-3-propyl-6H-pyrazolo[4,5-d]pyrimidin-7-one. InChIKey JQGFLCMKCZPSEC-UHFFFAOYSA-N lets you match it in any structure database.
How is Sildenafil EP Impurity B used in pharmaceutical QC?
Sildenafil EP Impurity B is a characterised reference material linked to Sildenafil. 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 Sildenafil 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 Sildenafil 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 Sildenafil EP Impurity B to my country?
Yes. Because Sildenafil EP Impurity B 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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