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Pharmacopeial Impurities (EP / USP / BP)

Probenecid EP Impurity A

Reference StandardAvailable on request

Probenecid EP Impurity A (CAS 636-78-2) supplier Zemixal. Lab and bulk packs, batch COA, fast global delivery. Catalogue no. ZX-026538.

Pack sizes
Probenecid EP Impurity A chemical structure
CAS number636-78-2
FormulaC7H6O5S
Molar mass202.19 g/mol
Physical formSolid
HS code38229090
InChIKeyHWAQOZGATRIYQG-UHFFFAOYSA-N
IUPAC name4-sulfobenzoic acid

About Probenecid EP Impurity A

Analytical teams working on Probenecid use Probenecid EP Impurity A as a qualified comparison standard. Key data (Reference Standard): CAS 636-78-2, formula C7H6O5S and molar mass 202.19 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

Storage and safety notes

Classified under GHS with signal word Danger and hazard statements H314. Read the SDS before first use.

Available as 10 mg, 25 mg, 50 mg and 100 mg. Larger or split packs can be arranged. 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 Probenecid

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

Probenecid 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 Probenecid EP Impurity A
Product nameProbenecid EP Impurity A
Catalogue numberZX-026538
CAS number636-78-2
IUPAC name4-sulfobenzoic acid
Molecular formulaC7H6O5S
Molar mass202.19 g/mol
Exact mass201.9936
GradeReference Standard
Physical formSolid
XLogP30.2
H-bond donors / acceptors2 / 5
Topological polar surface area100 Ų
HS code38229090
InChIKeyHWAQOZGATRIYQG-UHFFFAOYSA-N
SMILESC1=CC(=CC=C1C(=O)O)S(=O)(=O)O
PubChem CID69469
SynonymsProbenecid - Impurity A, 4-Sulfobenzoate, p-Sulfobenzoic acid, Benzoic acid, 4-sulfo-, para-Sulfobenzoic acid, para-Sulphobenzoic acid, 4-sulfobenzoicacid, 4-sulphobenzoic acid, 4-carboxybenzenesulfonic acid, 4-sulfobenzoicaci, 4-Sulfo-benzoesaeure, 4-Sulfo-benzoic acid

Lot values are stated on the batch certificate of analysis. Ask for a typical COA with your quotation.

Safety and GHS hazards

GHS05 Corrosive
Corrosive

Signal word Danger

  • H314Causes severe skin burns and eye damage

Precautionary statements P260, P264, P280, P301 + P330 + P331, P302 + P361 + P354, P304 + P340, P305 + P354 + P338, P316, P321, P363, P405, 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 Probenecid 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 Probenecid EP Impurity A

Which CAS number identifies Probenecid EP Impurity A?
Probenecid EP Impurity A is registered under CAS 636-78-2. You may also see it listed as Probenecid - Impurity A, 4-Sulfobenzoate, p-Sulfobenzoic acid. Our catalogue number for this item is ZX-026538.
What are the formula and molar mass of Probenecid EP Impurity A?
For Probenecid EP Impurity A, its formula is C7H6O5S and its molar mass is 202.19 g/mol. The systematic (IUPAC) name is 4-sulfobenzoic acid. InChIKey HWAQOZGATRIYQG-UHFFFAOYSA-N lets you match it in any structure database.
How is Probenecid EP Impurity A used in pharmaceutical QC?
Probenecid EP Impurity A is a characterised reference material linked to Probenecid. 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 Probenecid 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 Probenecid 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 Probenecid EP Impurity A to my country?
Yes. Because Probenecid 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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