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Pharmacopeial Impurities (EP / USP / BP)

Sildenafil EP Impurity F

Reference StandardIn stock

Buy Sildenafil EP Impurity F (CAS 139755-82-1) from Zemixal. Lab and bulk packs, batch COA, fast global delivery. Catalogue no. ZX-005993.

Pack sizes
Sildenafil EP Impurity F chemical structure
CAS number139755-82-1
FormulaC21H28N6O4S
Molar mass460.6 g/mol
Physical formSolid
HS code38229090
Purity99.97%
InChIKeyUZTKBZXHEOVDRL-UHFFFAOYSA-N
IUPAC name5-(2-ethoxy-5-piperazin-1-ylsulfonylphenyl)-1-methyl-3-propyl-6H-pyrazolo[4,5-d]pyrimidin-7-one

About Sildenafil EP Impurity F

Analytical teams working on Sildenafil use Sildenafil EP Impurity F as a qualified comparison standard. Identity at a glance (Reference Standard): CAS 139755-82-1, formula C21H28N6O4S and molar mass 460.6 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, H315, H319 and H335. 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. Each lot travels with 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 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 F
Product nameSildenafil EP Impurity F
Catalogue numberZX-005993
CAS number139755-82-1
IUPAC name5-(2-ethoxy-5-piperazin-1-ylsulfonylphenyl)-1-methyl-3-propyl-6H-pyrazolo[4,5-d]pyrimidin-7-one
Molecular formulaC21H28N6O4S
Molar mass460.6 g/mol
Exact mass460.1893
GradeReference Standard
Purity / assay99.97%
Physical formSolid
XLogP31
H-bond donors / acceptors2 / 8
Topological polar surface area126 Ų
HS code38229090
InChIKeyUZTKBZXHEOVDRL-UHFFFAOYSA-N
SMILESCCCC1=NN(C2=C1N=C(NC2=O)C3=C(C=CC(=C3)S(=O)(=O)N4CCNCC4)OCC)C
PubChem CID135455980
SynonymsN-Desmethyl Sildenafil, Desmethylsildenafil, N-Desmethylsildenafil, desmethyl sildenafil, N-Demethylsildenafil, Sildenafil EP Impurity F (N-Desmethyl Sildenafil), Sildenafil N-Desmethyl Metabolite, N-Desmethyl sildenafil (UK-103,320), N-Desmethylsildenafil (UK-103,320) (M4)

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
  • H315Causes skin irritation
  • H319Causes serious eye irritation
  • H335May cause respiratory irritation

Precautionary statements P261, P264, P264 + P265, P270, P271, P280, P301 + P317, P302 + P352, P304 + P340, P305 + P351 + P338, P319, P321, P330, P332 + P317, P337 + P317, P362 + P364, P403 + P233, 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 Sildenafil EP Impurity F
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 F

Which CAS number identifies Sildenafil EP Impurity F?
Sildenafil EP Impurity F is registered under CAS 139755-82-1. You may also see it listed as N-Desmethyl Sildenafil, Desmethylsildenafil, N-Desmethylsildenafil. Our catalogue number for this item is ZX-005993.
What are the formula and molar mass of Sildenafil EP Impurity F?
For Sildenafil EP Impurity F, its formula is C21H28N6O4S and its molar mass is 460.6 g/mol. The systematic (IUPAC) name is 5-(2-ethoxy-5-piperazin-1-ylsulfonylphenyl)-1-methyl-3-propyl-6H-pyrazolo[4,5-d]pyrimidin-7-one. InChIKey UZTKBZXHEOVDRL-UHFFFAOYSA-N lets you match it in any structure database.
How is Sildenafil EP Impurity F used in pharmaceutical QC?
Sildenafil EP Impurity F 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 F?
This listing is Reference Standard grade with 99.97% purity. 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 F?
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 F to my country?
Yes. Because Sildenafil EP Impurity F 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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