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Pharmacopeial Impurities (EP / USP / BP)

Atovaquone EP Impurity B

Reference StandardAvailable on request

Buy Atovaquone EP Impurity B (CAS 137732-39-9) from Zemixal. Request a quote with price, lead time and documents. Catalogue no. ZX-027692.

Pack sizes
Atovaquone EP Impurity B chemical structure
CAS number137732-39-9
FormulaC22H19ClO3
Molar mass366.8 g/mol
Physical formSolid
HS code38229090
InChIKeyBSJMWHQBCZFXBR-UHFFFAOYSA-N
IUPAC name3-[4-(4-chlorophenyl)cyclohexyl]-4-hydroxynaphthalene-1,2-dione

About Atovaquone EP Impurity B

Analytical teams working on Atovaquone use Atovaquone EP Impurity B as a qualified comparison standard. For your records (Reference Standard), the material is defined by CAS 137732-39-9, formula C22H19ClO3 and molar mass 366.8 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 Warning (H315, H319 and H335), so wear gloves and eye protection and work with good ventilation.

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. Request pricing online and we confirm availability, documentation and freight to your country.

Reference standards for Atovaquone

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

Atovaquone 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 Atovaquone EP Impurity B
Product nameAtovaquone EP Impurity B
Catalogue numberZX-027692
CAS number137732-39-9
IUPAC name3-[4-(4-chlorophenyl)cyclohexyl]-4-hydroxynaphthalene-1,2-dione
Molecular formulaC22H19ClO3
Molar mass366.8 g/mol
Exact mass366.1023
GradeReference Standard
Physical formSolid
XLogP35.2
H-bond donors / acceptors1 / 3
Topological polar surface area54.4 Ų
HS code38229090
InChIKeyBSJMWHQBCZFXBR-UHFFFAOYSA-N
SMILESC1CC(CCC1C2=CC=C(C=C2)Cl)C3=C(C4=CC=CC=C4C(=O)C3=O)O
PubChem CID74989
SynonymsAtovaquone - Impurity B, Atovaquone Related Compound A, 3-(4-(4-chlorophenyl)cyclohexyl)-4-hydroxynaphthalene-1,2-dione, Wellvone, cis-Atovaquone, Atavaquone, Mepron (antipneumocystic), BW 566C, 2-(trans-4-(p-Chlorophenyl)cyclohexyl)-3-hydroxy-1,4-naphthoquinone, 2-[trans-4-(4-chlorophenyl)cyclohexyl]-3-hydroxy-1,4-naphthoquinone, 2-((1r,4r)-4-(4-chlorophenyl)cyclohexyl)-3-hydroxynaphthalene-1,4-dione, 2-(4-(4-Chlorophenyl)cyclohexyl)-3-hydroxynaphthalene-1,4-dione

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

  • H315Causes skin irritation
  • H319Causes serious eye irritation
  • H335May cause respiratory irritation

Precautionary statements P261, P264, P264 + P265, P271, P280, P302 + P352, P304 + P340, P305 + P351 + P338, P319, P321, P332 + P317, P337 + P317, P362 + P364, P403 + P233, 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 Atovaquone 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 Atovaquone EP Impurity B

Which CAS number identifies Atovaquone EP Impurity B?
Atovaquone EP Impurity B is registered under CAS 137732-39-9. You may also see it listed as Atovaquone - Impurity B, Atovaquone Related Compound A, 3-(4-(4-chlorophenyl)cyclohexyl)-4-hydroxynaphthalene-1,2-dione. Our catalogue number for this item is ZX-027692.
What are the formula and molar mass of Atovaquone EP Impurity B?
For Atovaquone EP Impurity B, its formula is C22H19ClO3 and its molar mass is 366.8 g/mol. The systematic (IUPAC) name is 3-[4-(4-chlorophenyl)cyclohexyl]-4-hydroxynaphthalene-1,2-dione. InChIKey BSJMWHQBCZFXBR-UHFFFAOYSA-N lets you match it in any structure database.
How is Atovaquone EP Impurity B used in pharmaceutical QC?
Atovaquone EP Impurity B is a characterised reference material linked to Atovaquone. 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 Atovaquone 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 Atovaquone 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 Atovaquone EP Impurity B to my country?
Yes. Because Atovaquone 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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