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Pharmacopeial Impurities (EP / USP / BP)

Dapsone EP Impurity A

Reference StandardAvailable on request

Order Dapsone EP Impurity A (CAS 25963-47-7) online at Zemixal: C12H11NO3S, COA and SDS with every lot, worldwide shipping.

Pack sizes
Dapsone EP Impurity A chemical structure
CAS number25963-47-7
FormulaC12H11NO3S
Molar mass249.29 g/mol
Physical formSolid
HS code38229090
InChIKeyPSHPCZGANRRQDN-UHFFFAOYSA-N
IUPAC name4-(4-aminophenyl)sulfonylphenol

About Dapsone EP Impurity A

Zemixal lists Dapsone EP Impurity A for laboratories that identify, quantify or control Dapsone and its related substances. For your records (Reference Standard), the material is defined by CAS 25963-47-7, formula C12H11NO3S and molar mass 249.29 g/mol. It is handled as a solid.

Common uses in the lab and plant

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

Safe handling

It carries the GHS signal word Warning (H317 and H319), so wear gloves and eye protection and work with good ventilation.

Standard pack sizes are 10 mg, 25 mg, 50 mg and 100 mg, and custom quantities are quoted on request. Every shipment includes a certificate of analysis with characterisation data. Send an enquiry through the quote panel and you get a formal offer with Incoterms and delivery time.

Reference standards for Dapsone

See every impurity, metabolite and related compound we list for this API.

Dapsone 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 Dapsone EP Impurity A
Product nameDapsone EP Impurity A
Catalogue numberZX-028840
CAS number25963-47-7
IUPAC name4-(4-aminophenyl)sulfonylphenol
Molecular formulaC12H11NO3S
Molar mass249.29 g/mol
Exact mass249.046
GradeReference Standard
Physical formSolid
XLogP31.6
H-bond donors / acceptors2 / 4
Topological polar surface area88.8 Ų
HS code38229090
InChIKeyPSHPCZGANRRQDN-UHFFFAOYSA-N
SMILESC1=CC(=CC=C1N)S(=O)(=O)C2=CC=C(C=C2)O
PubChem CID117686
SynonymsDapsone - Impurity A, 4-((4-aminophenyl)sulfonyl)phenol, Phenol, 4-[(4-aminophenyl)sulfonyl]-, Phenol, 4-((4-aminophenyl)sulfonyl)-, 4-Amino-4'-hydroxydiphenylsulfone, p-Sulfanilylphenol, 4-((4-Aminophenyl)sulphonyl)phenol, Dapsone Impurity 17, Phenol,4-[(4-aminophenyl)sulfonyl]-, 4-(4'-hydroxyphenylsulfonyl)aniline, 4-(4-Aminobenzene-1-sulfonyl)phenol

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

  • H317May cause an allergic skin reaction
  • H319Causes serious eye irritation

Precautionary statements P261, P264 + P265, P272, P280, P302 + P352, P305 + P351 + P338, P321, P333 + P317, P337 + P317, P362 + P364, 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 Dapsone EP Impurity A
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 Dapsone EP Impurity A

Which CAS number identifies Dapsone EP Impurity A?
Dapsone EP Impurity A is registered under CAS 25963-47-7. You may also see it listed as Dapsone - Impurity A, 4-((4-aminophenyl)sulfonyl)phenol, Phenol, 4-[(4-aminophenyl)sulfonyl]-. Our catalogue number for this item is ZX-028840.
What are the formula and molar mass of Dapsone EP Impurity A?
For Dapsone EP Impurity A, its formula is C12H11NO3S and its molar mass is 249.29 g/mol. The systematic (IUPAC) name is 4-(4-aminophenyl)sulfonylphenol. InChIKey PSHPCZGANRRQDN-UHFFFAOYSA-N lets you match it in any structure database.
How is Dapsone EP Impurity A used in pharmaceutical QC?
Dapsone EP Impurity A is a characterised reference material linked to Dapsone. 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 Dapsone EP Impurity A?
This listing is Reference Standard grade. 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 Dapsone EP Impurity A?
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 Dapsone EP Impurity A to my country?
Yes. Because Dapsone EP Impurity A 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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