Sulfasalazine EP Impurity I

About Sulfasalazine EP Impurity I

Sulfasalazine EP Impurity I is a pharmacopeial impurity of Sulfasalazine carrying the CAS registry number 21542-82-5. Its molecular formula is C13H10N2O6S and its molecular weight is 322.3 g/mol. Systematically, it is named 2-hydroxy-5-[(4-sulfophenyl)diazenyl]benzoic acid. Common synonyms include Sulfasalazine - Impurity I and 5-(4-sulfophenylazo)salicylic acid.

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 Sulfasalazine to develop and validate HPLC methods, to set specification limits and to document impurity profiles in ANDA and DMF submissions. Typical end-use sectors are 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 Sulfasalazine

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

Sulfasalazine impurities

Grade guides

Specifications & identifiers

Chemical identifiers
Product name	Sulfasalazine EP Impurity I
Catalogue No.	VQ-043308
CAS Number	21542-82-5
IUPAC name	2-hydroxy-5-[(4-sulfophenyl)diazenyl]benzoic acid
Molecular formula	C₁₃H₁₀N₂O₆S
Molecular weight	322.3 g/mol
Exact mass	322.026
Grade	Reference Standard
HSN code	38229090
InChIKey	MXCDRFGKHNFKIP-UHFFFAOYSA-N
SMILES	C1=CC(=CC=C1N=NC2=CC(=C(C=C2)O)C(=O)O)S(=O)(=O)O
PubChem CID	80158

Physical properties
Physical form	Solid
LogP (XLogP3)	-1.7
H-bond donors / acceptors	3 / 8
TPSA	145 Å²
Synonyms	Sulfasalazine - Impurity I, 2-Hydroxy-5-((4-sulfophenyl)diazenyl)benzoic acid, Benzoic acid, 2-hydroxy-5-(2-(4-sulfophenyl)diazenyl)-, 5-(4-sulfophenylazo)salicylic acid, benzoic acid, 2-hydroxy-5-(4-sulfophenylazo)-, 2-Hydroxy-5-[2-(4-sulfophenyl)diazenyl]benzoic acid

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 Sulfasalazine EP Impurity I?

The CAS Registry Number of Sulfasalazine EP Impurity I is 21542-82-5. It is also known as Sulfasalazine - Impurity I, 2-Hydroxy-5-((4-sulfophenyl)diazenyl)benzoic acid, Benzoic acid, 2-hydroxy-5-(2-(4-sulfophenyl)diazenyl)-.

What is the molecular formula and molecular weight of Sulfasalazine EP Impurity I?

Sulfasalazine EP Impurity I has the molecular formula C13H10N2O6S and a molecular weight of 322.3 g/mol. Its IUPAC name is 2-hydroxy-5-[(4-sulfophenyl)diazenyl]benzoic acid.

What is Sulfasalazine EP Impurity I used for?

Sulfasalazine EP Impurity I is supplied as a characterised reference material related to Sulfasalazine. 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 Sulfasalazine EP Impurity I can I order?

We supply Sulfasalazine EP Impurity I 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 Sulfasalazine EP Impurity I?

Yes. Every lot of Sulfasalazine EP Impurity I 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 Sulfasalazine EP Impurity I be shipped internationally?

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