Impurity reference standards
Carbidopa impurity standards
For Carbidopa, the Zemixal catalogue holds 25 impurity and reference standards that support release testing, stability programmes and regulatory dossiers. Counted by type, there are 10 pharmacopoeial impurities and 4 metabolites or hydroxylated analogues.
25reference materials
10pharmacopoeial
4metabolites
Every standard comes with a certificate of analysis. Structure confirmation data, typically NMR, MS and chromatographic purity, is available on request. They are bought for system suitability, peak identification, quantitation against limits and the impurity justification sections of regulatory submissions.
By impurity type
Pharmacopoeial10EP, USP, BP or JP named impurities
Metabolites4Hydroxy, desmethyl and conjugated forms
Counts are based on product names. One compound can fall into more than one type.
All Carbidopa reference materials
1–25 of 25 standards
Ethyl 3-(3,4-dihydroxyphenyl)-2-hydrazinyl-2-methylpropanoate hydrochloride
- CAS
- 96115-88-7
- Formula
- C12H19ClN2O4
- MW
- 290.74 g/mol
ZX-023758
Methyl 3-(3,4-dihydroxyphenyl)-2-hydrazinyl-2-methylpropanoate
- CAS
- 91431-01-5
- Formula
- C11H16N2O4
- MW
- 240.26 g/mol
ZX-023759
Methyl 3-(3,4-dihydroxyphenyl)-2-methyl propanoate
- CAS
- 2104012-68-0
- Formula
- C11H14O4
- MW
- 210.23 g/mol
ZX-028460
Questions
Carbidopa impurities, answered
What Carbidopa reference materials are available?
The catalogue currently lists 25 compounds for Carbidopa, including 10 pharmacopoeial impurities and 4 metabolites or hydroxylated analogues. Each product page shows the CAS number where one is assigned, the structure, formula and molecular weight.
What documents come with a Carbidopa 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 Carbidopa 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.