Sulfinpyrazone

About Sulfinpyrazone

Sulfinpyrazone is a high-purity reference standard of Siponimod carrying the CAS registry number 57-96-5. Its molecular formula is C23H20N2O3S and its molecular weight is 404.5 g/mol. The IUPAC name is 4-[2-(benzenesulfinyl)ethyl]-1,2-diphenylpyrazolidine-3,5-dione. It is also known as Sulphinpyrazone or Anturane.

The product is provided as a solid. Reference materials should be stored sealed and away from light and moisture, as specified on the accompanying COA. Under GHS it is labelled “Warning”, so handle it with suitable PPE and consult the SDS.

Laboratories use this Siponimod standard for identity and assay testing, system suitability checks and method validation supporting ANDA and DMF filings. Buyers come mainly from pharmaceutical manufacturing and academic and industrial research.

Available in 10 mg, 25 mg, 50 mg and 100 mg packs, Sulfinpyrazone is dispatched with a Certificate of Analysis (COA) to destinations worldwide.

Typical applications

Identification & assay
Method development & validation
QC reference material

Industries

Related to Siponimod

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

Siponimod impurities

Specifications & identifiers

Chemical identifiers
Product name	Sulfinpyrazone
Catalogue No.	VQ-042313
CAS Number	57-96-5
IUPAC name	4-[2-(benzenesulfinyl)ethyl]-1,2-diphenylpyrazolidine-3,5-dione
Molecular formula	C₂₃H₂₀N₂O₃S
Molecular weight	404.5 g/mol
Exact mass	404.1195
Grade	Reference Standard
HSN code	38229090
InChIKey	MBGGBVCUIVRRBF-UHFFFAOYSA-N
SMILES	C1=CC=C(C=C1)N2C(=O)C(C(=O)N2C3=CC=CC=C3)CCS(=O)C4=CC=CC=C4
PubChem CID	5342

Physical properties
Physical form	Solid
LogP (XLogP3)	2.3
H-bond donors / acceptors	0 / 4
TPSA	76.9 Å²
Synonyms	Sulphinpyrazone, Anturane, Diphenylpyrazone, Sulfoxyphenylpyrazolidine, Anturidin, 1,2-Diphenyl-4-(2-(phenylsulfinyl)ethyl)pyrazolidine-3,5-dione, 4-(Phenylsulfoxyethyl)-1,2-diphenyl-3,5-pyrazolidinedione, 1,2-Diphenyl-4-(2'-phenylsulfinethyl)-3,5-pyrazolidinedione, 4-(2-Benzenesulfinylethyl)-1,2-diphenylpyrazolidine-3,5-dione, 1,2-Diphenyl-3,5-dioxo-4-(2-phenylsulfinylethyl)pyrazolidine, 3,5-Pyrazolidinedione, 1,2-diphenyl-4-(2-(phenylsulfinyl)ethyl)-, 3,5-Pyrazolidinedione, 1,2-diphenyl-4-[2-(phenylsulfinyl)ethyl]-

Safety & hazard information (GHS)

Harmful / irritant

Signal word: Warning

Hazard statements

H302Harmful if swallowed

Precautionary statements: P264, P270, P301 + P317, P330, P501

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 Sulfinpyrazone?

The CAS Registry Number of Sulfinpyrazone is 57-96-5. It is also known as Sulphinpyrazone, Anturane, Diphenylpyrazone.

What is the molecular formula and molecular weight of Sulfinpyrazone?

Sulfinpyrazone has the molecular formula C23H20N2O3S and a molecular weight of 404.5 g/mol. Its IUPAC name is 4-[2-(benzenesulfinyl)ethyl]-1,2-diphenylpyrazolidine-3,5-dione.

What is Sulfinpyrazone used for?

Sulfinpyrazone is supplied as a characterised reference material related to Siponimod. 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 Sulfinpyrazone can I order?

We supply Sulfinpyrazone 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 Sulfinpyrazone?

Yes. Every lot of Sulfinpyrazone 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 Sulfinpyrazone be shipped internationally?

Yes. Sulfinpyrazone 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.