Sildenafil EP Impurity A

About Sildenafil EP Impurity A

Sildenafil EP Impurity A is a pharmacopeial impurity of Sildenafil carrying the CAS registry number 1391053-95-4. The compound has the formula C23H32N6O4S, corresponding to a molecular weight of 488.6 g/mol. Common synonyms include Sildenafil Citrate - Impurity A and Isobutyl Sildenafil.

It is supplied as a solid. Reference materials should be stored sealed and away from light and moisture, as specified on the accompanying COA. Good laboratory practice and suitable PPE are recommended during handling.

Pharmaceutical QC and development laboratories use this impurity standard of Sildenafil to develop and validate HPLC methods, to set specification limits and to document impurity profiles in ANDA and DMF submissions. It is used across pharmaceutical manufacturing and academic and industrial research.

Standard pack sizes are 10 mg, 25 mg, 50 mg and 100 mg, and every batch ships with a Certificate of Analysis (COA) and we export 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 A
Catalogue No.	VQ-023749
CAS Number	1391053-95-4
IUPAC name	5-[2-ethoxy-5-(4-methylpiperazin-1-yl)sulfonylphenyl]-1-methyl-3-(2-methylpropyl)-6H-pyrazolo[4,5-d]pyrimidin-7-one
Molecular formula	C₂₃H₃₂N₆O₄S
Molecular weight	488.6 g/mol
Exact mass	488.2206
Grade	Reference Standard
HSN code	38229090
InChIKey	MDDMCAQUTIFYAH-UHFFFAOYSA-N
SMILES	CCOC1=C(C=C(C=C1)S(=O)(=O)N2CCN(CC2)C)C3=NC4=C(C(=O)N3)N(N=C4CC(C)C)C
PubChem CID	135565336

Physical properties
Physical form	Solid
LogP (XLogP3)	1.9
H-bond donors / acceptors	1 / 8
TPSA	118 Å²
Synonyms	Sildenafil Citrate - Impurity A, Isobutyl Sildenafil, Despropyl isobutyl sildenafil, Sildenafil Impurity A, Sildenafil A, Isomer of Isobutyl Sildenafil

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 A?

The CAS Registry Number of Sildenafil EP Impurity A is 1391053-95-4. It is also known as Sildenafil Citrate - Impurity A, Isobutyl Sildenafil, Despropyl isobutyl sildenafil.

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

Sildenafil EP Impurity A has the molecular formula C23H32N6O4S and a molecular weight of 488.6 g/mol. Its IUPAC name is 5-[2-ethoxy-5-(4-methylpiperazin-1-yl)sulfonylphenyl]-1-methyl-3-(2-methylpropyl)-6H-pyrazolo[4,5-d]pyrimidin-7-one.

What is Sildenafil EP Impurity A used for?

Sildenafil EP Impurity A 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 A can I order?

We supply Sildenafil EP Impurity A 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 A?

Yes. Every lot of Sildenafil EP Impurity A 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 A be shipped internationally?

Yes. We export Sildenafil EP Impurity A worldwide by air and sea freight or express courier, on EXW, FOB, CIF, CFR or DAP Incoterms, with full export documentation.