(2R,3S)-N-Benzoyl-3-phenyl Isoserine Ethyl Ester
- CAS
- 153433-80-8
- Formula
- C18H19NO4
- MW
- 313.3 g/mol
ZX-026265
Impurity reference standards
Paclitaxel impurity standards
This page brings together 38 Paclitaxel related compounds that analytical teams use to identify, quantify and control impurities in the active ingredient and the finished dosage form. The range includes 17 pharmacopoeial impurities, 1 metabolite or hydroxylated analogue and 1 degradation product.
38reference materials
17pharmacopoeial
1metabolites
1degradants
Batches are supplied with a certificate of analysis, and the supporting spectra can be sent ahead of a purchase order so your QA team can review them. They are bought for system suitability, peak identification, quantitation against limits and the impurity justification sections of regulatory submissions.
By impurity type
Pharmacopoeial17EP, USP, BP or JP named impurities
Metabolites1Hydroxy, desmethyl and conjugated forms
Degradants1N-oxides, dimers, lactones and breakdown products
Counts are based on product names. One compound can fall into more than one type.
All Paclitaxel reference materials
1–38 of 38 standards
(4S,5R)-2-(4-Methoxy-phenyl)-3-N-BOC-4-phenyl-3, 5-oxazolidine carboxylic acid
- CAS
- 196404-55-4
- Formula
- C22H25NO6
- MW
- 399.4 g/mol
ZX-028394
7,10-Bis[O-(triethylsilyl)]-10-deacetyl Baccatin III
- CAS
- 149107-84-6
- Formula
- C41H64O10Si2
- MW
- 773.1 g/mol
ZX-046028
Methyl(2S,4S,5R)-3-benzoyl-2-(4-methoxyphenyl)-4-phenyloxazolidine-5-carboxylate
- CAS
- 202390-85-0
- Formula
- C25H23NO5
- MW
- 417.45 g/mol
ZX-042311
Paclitaxel Oxetane Ring-Opened 3-Acetyl 4-Benzoyl Impurity
- CAS
- 932042-85-8
- Formula
- C47H53NO15
- MW
- 871.9 g/mol
ZX-026272
Questions
Paclitaxel impurities, answered
What Paclitaxel reference materials are available?
The catalogue currently lists 38 compounds for Paclitaxel, including 17 pharmacopoeial impurities, 1 metabolite or hydroxylated analogue and 1 degradation product. Each product page shows the CAS number where one is assigned, the structure, formula and molecular weight.
What documents come with a Paclitaxel impurity standard?
A certificate of analysis travels with every lot. On request we share the characterisation set, usually 1H-NMR, mass spectrum, HPLC purity and IR, and for some materials TGA or water content. Ask for the data before ordering if your QA team needs to review it.
Can Zemixal make a Paclitaxel impurity that is not listed?
Often yes. Send the structure, name or CAS number with the quantity you need and our sourcing team checks custom synthesis options, usually from 10 mg up to gram scale, with a quoted lead time.