Impurity reference standards
Formoterol impurity standards
This page brings together 33 Formoterol related compounds that analytical teams use to identify, quantify and control impurities in the active ingredient and the finished dosage form. The range includes 11 pharmacopoeial impurities, 1 isotope-labelled standard and 4 metabolites or hydroxylated analogues.
33reference materials
11pharmacopoeial
1isotope labelled
4metabolites
Each lot ships with a certificate of analysis, and characterisation data such as 1H-NMR, mass spectrum and HPLC purity can be shared before you order. Typical uses are method development and validation, relative response factor work, forced degradation studies and the impurity sections of ANDA, DMF or CEP filings.
By impurity type
Pharmacopoeial11EP, USP, BP or JP named impurities
Isotope labelled1Deuterated, 13C or 15N internal standards
Metabolites4Hydroxy, desmethyl and conjugated forms
Counts are based on product names. One compound can fall into more than one type.
All Formoterol reference materials
1–33 of 33 standards
1-(4-(Benzyloxy)-3-nitrophenyl)-2-bromoethanone
- CAS
- 43229-01-2
- Formula
- C15H12BrNO4
- MW
- 350.16 g/mol
ZX-023354
2-(Benzyl(1-(4-methoxyphenyl)propan-2-yl)amino)-1-(4-(benzyloxy)-3-nitrophenyl)ethan-1-one
- CAS
- 43229-66-9
- Formula
- C32H32N2O5
- MW
- 524.6 g/mol
ZX-039199
Formoterol Fumarate Dihydrate EP Impurity I (R,S-isomer) ((R,S)-Formoterol)
- CAS
- 67346-51-4
- Formula
- C19H24N2O4
- MW
- 344.4 g/mol
ZX-028066
Formoterol Fumarate Dihydrate EP Impurity I (S,R-isomer) ((S,R)-Formoterol)
- CAS
- 67346-50-3
- Formula
- C19H24N2O4
- MW
- 344.4 g/mol
ZX-028065
N-(5-((R)-2-(Benzyl((R)-1-(4-methoxyphenyl)propan-2-yl)amino)-1-hydroxyethyl)-2-(benzyloxy)phenyl)formamide
- CAS
- 188690-83-7
- Formula
- C33H36N2O4
- MW
- 524.6 g/mol
ZX-029625
N-(5-((S)-2-(Benzyl((S)-1-(4-methoxyphenyl)propan-2-yl)amino)-1-hydroxyethyl)-2-(benzyloxy)phenyl)formamide
- CAS
- 143687-23-4
- Formula
- C33H36N2O4
- MW
- 524.6 g/mol
ZX-042868
rac-O-Benzyl N-Benzyl Formoterol (Mixture of Diastereomers)
- CAS
- 43229-70-5
- Formula
- C33H36N2O4
- MW
- 524.6 g/mol
ZX-024861
Questions
Formoterol impurities, answered
What Formoterol reference materials are available?
The catalogue currently lists 33 compounds for Formoterol, including 11 pharmacopoeial impurities, 1 isotope-labelled standard 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 Formoterol 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 Formoterol 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.
Are isotope-labelled Formoterol standards available?
Yes. 1 stable-isotope labelled compound is listed, suitable as internal standards for LC-MS bioanalysis and trace impurity quantitation.