Sildenafil EP Impurity C

Name: Sildenafil EP Impurity C
Brand: Vaqora Chemicals
SKU: VQ-023751

About Sildenafil EP Impurity C

Vaqora Chemicals supplies Sildenafil EP Impurity C, a pharmacopeial impurity of Sildenafil registered under CAS number 139755-91-2. With the molecular formula C20H26N6O4S, it has a molar mass of 446.5 g/mol. The IUPAC name is 5-[2-hydroxy-5-(4-methylpiperazin-1-yl)sulfonylphenyl]-1-methyl-3-propyl-6H-pyrazolo[4,5-d]pyrimidin-7-one. Common synonyms include Desethyl Sildenafil and Sildenafil Citrate - Impurity C.

The product is provided as a solid. Keep the vial tightly closed, protected from light and humidity, at the temperature stated on the Certificate of Analysis. It carries the GHS signal word “Warning” with 11 hazard statements. Review the Safety Data Sheet before use.

As a characterised impurity of Sildenafil, it is used for analytical method development, method validation (AMV) and routine quality-control testing, and it supports ANDA and DMF regulatory filings. Buyers come mainly from pharmaceutical manufacturing and academic and industrial research.

Vaqora Chemicals supplies Sildenafil EP Impurity C in 10 mg, 25 mg, 50 mg and 100 mg packs, each shipped with a Certificate of Analysis (COA), and exports worldwide.

Typical applications

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

Industries

Related to Sildenafil

View every impurity, metabolite and intermediate we list for Sildenafil.

Sildenafil impurities

Grade guides

Specifications & identifiers

Chemical identifiers
Product name	Sildenafil EP Impurity C
Catalogue No.	VQ-023751
CAS Number	139755-91-2
IUPAC name	5-[2-hydroxy-5-(4-methylpiperazin-1-yl)sulfonylphenyl]-1-methyl-3-propyl-6H-pyrazolo[4,5-d]pyrimidin-7-one
Molecular formula	C₂₀H₂₆N₆O₄S
Molecular weight	446.5 g/mol
Exact mass	446.1736
Grade	Reference Standard
HSN code	38229090
InChIKey	LTNJUPYNXDNXBO-UHFFFAOYSA-N
SMILES	CCCC1=NN(C2=C1N=C(NC2=O)C3=C(C=CC(=C3)S(=O)(=O)N4CCN(CC4)C)O)C
PubChem CID	135565516

Physical properties
Physical form	Solid
LogP (XLogP3)	0.8
H-bond donors / acceptors	2 / 8
TPSA	129 Å²
Synonyms	Desethyl Sildenafil, Sildenafil Citrate - Impurity C, o-Desethyl sildenafil, Sildenafil Impurity C, Sildenafil citrate impurity C, O-Desethylsildenafil

Safety & hazard information (GHS)

Harmful / irritant

Signal word: Warning

Hazard statements

H302+H312+H332Harmful if swallowed, in contact with skin or if inhaled
H302Harmful if swallowed
H312Harmful in contact with skin
H315Causes skin irritation
H317May cause an allergic skin reaction
H319Causes serious eye irritation
H332Harmful if inhaled
H335May cause respiratory irritation
H336May cause drowsiness or dizziness
H362May cause harm to breast-fed children
H412Harmful to aquatic life with long lasting effects

Precautionary statements: P203, P260, P261, P263, 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

Classification is indicative (aggregated GHS notifications) and may vary by grade and concentration. Always refer to the SDS supplied with your lot.

Documents

Safety Data Sheet (SDS)16-section GHS · on request Certificate of AnalysisTypical / batch COA · on request Specification sheetTDS / MOA · on request

Frequently asked questions

What is the CAS number of Sildenafil EP Impurity C?

The CAS Registry Number of Sildenafil EP Impurity C is 139755-91-2. It is also known as Desethyl Sildenafil, Sildenafil Citrate - Impurity C, o-Desethyl sildenafil.

What is the molecular formula and molecular weight of Sildenafil EP Impurity C?

Sildenafil EP Impurity C has the molecular formula C20H26N6O4S and a molecular weight of 446.5 g/mol. Its IUPAC name is 5-[2-hydroxy-5-(4-methylpiperazin-1-yl)sulfonylphenyl]-1-methyl-3-propyl-6H-pyrazolo[4,5-d]pyrimidin-7-one.

What is Sildenafil EP Impurity C used for?

Sildenafil EP Impurity C is supplied as a characterised reference material related to Sildenafil. It is used for analytical method development and validation (AMV), impurity profiling, stability studies and quality control, and in ANDA/DMF regulatory filings.

Which grade and pack sizes of Sildenafil EP Impurity C can I order?

We supply Sildenafil EP Impurity C in Reference Standard grade, in 10 mg, 25 mg, 50 mg, 100 mg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Sildenafil EP Impurity C?

Yes. Every lot of Sildenafil EP Impurity C is shipped with a batch-specific Certificate of Analysis, and a 16-section GHS Safety Data Sheet is provided with the quotation and the shipment.

Can Sildenafil EP Impurity C be shipped internationally?

Yes. Sildenafil EP Impurity C is classified as hazardous, so it is packed in UN-approved packaging and shipped as dangerous goods under IATA/IMDG rules. We export worldwide on EXW, FOB, CIF and DAP terms.