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Pharmacopeial Impurities (EP / USP / BP)

Azathioprine EP Impurity B

Reference StandardAvailable on request

Order Azathioprine EP Impurity B (CAS 157930-13-7) online at Zemixal. Lab and bulk packs, batch COA, fast global delivery.

Pack sizes
Azathioprine EP Impurity B chemical structure
CAS number157930-13-7
FormulaC5H4N4S
Molar mass152.18 g/mol
Physical formSolid
HS code38229090
InChIKeyGLVAUDGFNGKCSF-UHFFFAOYSA-N
IUPAC name3,7-dihydropurine-6-thione

About Azathioprine EP Impurity B

Azathioprine EP Impurity B is supplied by Zemixal as a characterised reference material for Azathioprine analysis. Identity at a glance (Reference Standard): CAS 157930-13-7, formula C5H4N4S and molar mass 152.18 g/mol. It is handled as a solid.

Where it is used

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

Storage and safety notes

Hazard communication follows GHS (Danger: H301, H302 and H361). Our SDS lists exposure controls and first-aid measures.

Standard pack sizes are 10 mg, 25 mg, 50 mg and 100 mg, and custom quantities are quoted on request. You receive a certificate of analysis with characterisation data with each order. Add it to your quote list and our team replies with price, lead time and shipping options within one business day.

Reference standards for Azathioprine

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

Azathioprine standards

Typical uses

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

Applications

Grade guides

Specifications and identifiers

Specifications of Azathioprine EP Impurity B
Product nameAzathioprine EP Impurity B
Catalogue numberZX-032805
CAS number157930-13-7
IUPAC name3,7-dihydropurine-6-thione
Molecular formulaC5H4N4S
Molar mass152.18 g/mol
Exact mass152.0157
GradeReference Standard
Physical formSolid
H-bond donors / acceptors2 / 2
Topological polar surface area85.2 Ų
HS code38229090
InChIKeyGLVAUDGFNGKCSF-UHFFFAOYSA-N
SMILESC1=NC2=C(N1)C(=S)N=CN2
PubChem CID667490
SynonymsAzathioprine - Impurity B, Mercaptopurine, 6-Mercaptopurine, Mercapurin, 6-Thiopurine, 6-Thioxopurine, 9H-Purine-6-thiol, 6-Mercaptopurin, Puri-Nethol, 6-Thiohypoxanthine, 1,9-dihydro-6H-purine-6-thione, Mercaptopurin

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

Safety and GHS hazards

GHS06 Acute toxicity
Acute toxicity
GHS07 Irritant or harmful
Irritant or harmful
GHS08 Health hazard
Health hazard

Signal word Danger

  • H301Toxic if swallowed
  • H302Harmful if swallowed
  • H361Suspected of damaging fertility or the unborn child

Precautionary statements P203, P264, P270, P280, P301 + P316, P301 + P317, P318, P321, P330, 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 Azathioprine EP Impurity B
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 Azathioprine EP Impurity B

Which CAS number identifies Azathioprine EP Impurity B?
Azathioprine EP Impurity B is registered under CAS 157930-13-7. You may also see it listed as Azathioprine - Impurity B, Mercaptopurine, 6-Mercaptopurine. Our catalogue number for this item is ZX-032805.
What are the formula and molar mass of Azathioprine EP Impurity B?
For Azathioprine EP Impurity B, its formula is C5H4N4S and its molar mass is 152.18 g/mol. The systematic (IUPAC) name is 3,7-dihydropurine-6-thione. InChIKey GLVAUDGFNGKCSF-UHFFFAOYSA-N lets you match it in any structure database.
How is Azathioprine EP Impurity B used in pharmaceutical QC?
Azathioprine EP Impurity B is a characterised reference material linked to Azathioprine. 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 Azathioprine EP Impurity B?
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 Azathioprine EP Impurity B?
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 Azathioprine EP Impurity B to my country?
Yes. Because Azathioprine EP Impurity B 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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