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Pharmacopeial Impurities (EP / USP / BP)

Temozolomide EP Impurity B

Reference StandardAvailable on request

Order Temozolomide EP Impurity B (CAS 113942-30-6) online at Zemixal. Lab and bulk packs, batch COA, fast global delivery.

Pack sizes
Temozolomide EP Impurity B chemical structure
CAS number113942-30-6
FormulaC6H5N5O3
Molar mass195.14 g/mol
Physical formSolid
HS code38229090
InChIKeyVVTMIOYTNALQAW-UHFFFAOYSA-N
IUPAC name3-methyl-4-oxoimidazo[5,1-d][1,2,3,5]tetrazine-8-carboxylic acid

About Temozolomide EP Impurity B

Zemixal lists Temozolomide EP Impurity B for laboratories that identify, quantify or control Temozolomide and its related substances. Key data (Reference Standard): CAS 113942-30-6, formula C6H5N5O3 and molar mass 195.14 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

Handling and storage

It carries the GHS signal word Danger (H302, H340, H350 and H360), 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. You receive a certificate of analysis with characterisation data with each order. Request pricing online and we confirm availability, documentation and freight to your country.

Reference standards for Temozolomide

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

Temozolomide 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 Temozolomide EP Impurity B
Product nameTemozolomide EP Impurity B
Catalogue numberZX-020403
CAS number113942-30-6
IUPAC name3-methyl-4-oxoimidazo[5,1-d][1,2,3,5]tetrazine-8-carboxylic acid
Molecular formulaC6H5N5O3
Molar mass195.14 g/mol
Exact mass195.0392
GradeReference Standard
Physical formSolid
XLogP3-0.4
H-bond donors / acceptors1 / 6
Topological polar surface area100 Ų
HS code38229090
InChIKeyVVTMIOYTNALQAW-UHFFFAOYSA-N
SMILESCN1C(=O)N2C=NC(=C2N=N1)C(=O)O
PubChem CID11830328
SynonymsTemozolomide Acid, Temozolomide - Impurity B, 3-Methyl-4-oxo-3,4-dihydroimidazo[5,1-d][1,2,3,5]tetrazine-8-carboxylic acid, Temozolomide-8-carboxylic Acid, Imidazo[5,1-d]-1,2,3,5-tetrazine-8-carboxylic acid, 3,4-dihydro-3-methyl-4-oxo-, 3-Methyl-4-oxo-3,4-dihydroimidazo(5,1-d)(1,2,3,5)tetrazine-8-carboxylic acid, Imidazo(5,1-d)-1,2,3,5-tetrazine-8-carboxylic acid, 3,4-dihydro-3-methyl-4-oxo-, 3-Methyl-4-oxo-3,4-dihydroimidazo[5,1-d]-[1,2,3,5]tetrazine-8-carboxylic acid, 3-Methyl-4-oxo-3,4-dihydro-imidazo[5,1-d][1,2,3,5]tetrazine-8-carboxylic acid, 3-Methyl-4-oxo-3,4, 3-Methyl-4-oxo-34-dihydroimidazo[51-d][1235]tetrazine-8-carboxylic acid, 3-methyl-4-oxo-imidazo[5,1-d][1,2,3,5]tetrazine-8-carboxylic acid

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
GHS08 Health hazard
Health hazard

Signal word Danger

  • H302Harmful if swallowed
  • H340May cause genetic defects
  • H350May cause cancer
  • H360May damage fertility or the unborn child
  • H372Causes damage to organs through prolonged or repeated exposure

Precautionary statements P203, P260, P264, P270, P280, P301 + P317, P318, P319, 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 Temozolomide 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 Temozolomide EP Impurity B

Which CAS number identifies Temozolomide EP Impurity B?
Temozolomide EP Impurity B is registered under CAS 113942-30-6. You may also see it listed as Temozolomide Acid, Temozolomide - Impurity B, 3-Methyl-4-oxo-3,4-dihydroimidazo[5,1-d][1,2,3,5]tetrazine-8-carboxylic acid. Our catalogue number for this item is ZX-020403.
What are the formula and molar mass of Temozolomide EP Impurity B?
For Temozolomide EP Impurity B, its formula is C6H5N5O3 and its molar mass is 195.14 g/mol. The systematic (IUPAC) name is 3-methyl-4-oxoimidazo[5,1-d][1,2,3,5]tetrazine-8-carboxylic acid. InChIKey VVTMIOYTNALQAW-UHFFFAOYSA-N lets you match it in any structure database.
How is Temozolomide EP Impurity B used in pharmaceutical QC?
Temozolomide EP Impurity B is a characterised reference material linked to Temozolomide. 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 Temozolomide 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 Temozolomide 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 Temozolomide EP Impurity B to my country?
Yes. Because Temozolomide 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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