Impurity reference standards
Fexofenadine impurities & reference standards
Characterised Fexofenadine impurities, degradation products and related compounds for analytical method development, validation, QC release and regulatory filings.
42reference materials
2isotope-labelled
COAHPLC · NMR · MS on request
Parent API: Fexofenadine
83799-24-0 · C32H39NO4
2-(4-(4-Chlorobutanoyl)phenyl)-2-methylpropanoic Acid
- CAS
- 169280-21-1
- Formula
- C14H17ClO3
- MW
- 268.73 g/mol
VQ-037252
3-(Cyclopropylcarbonyl)-α,α-dimethylbenzeneacetic Acid
- CAS
- 162096-56-2
- Formula
- C14H16O3
- MW
- 232.27 g/mol
VQ-032709
4-(Cyclopropylcarbonyl)-α,α-dimethylbenzeneacetic Acid
- CAS
- 162096-54-0
- Formula
- C14H16O3
- MW
- 232.27 g/mol
VQ-025771
4-(Cyclopropylcarbonyl)-α,α-dimethylbenzeneacetic Acid Methyl Ester
- CAS
- 880088-78-8
- Formula
- C15H18O3
- MW
- 246.3 g/mol
VQ-025772
![4-[4-[4-(Hydroxydiphenylmethyl)-1-piperidinyl]-1-butyn-1-yl]-α,α-dimethyl-benzeneacetic Acid chemical structure](/media/structures/LNQJRLLXDQRHIW-UHFFFAOYSA-N.svg)
4-[4-[4-(Hydroxydiphenylmethyl)-1-piperidinyl]-1-butyn-1-yl]-α,α-dimethyl-benzeneacetic Acid
- CAS
- 832088-68-3
- Formula
- C32H35NO3
- MW
- 481.6 g/mol
VQ-043171
4-Chloro-1-(4-(1-hydroxy-2-methylpropan-2-yl)phenyl)butan-1-one
- CAS
- 169280-25-5
- Formula
- C14H19ClO2
- MW
- 254.75 g/mol
VQ-048371
Cyclopropyl(3-(1-hydroxy-2-methylpropan-2-yl)phenyl)methanone
- CAS
- 480466-36-2
- Formula
- C14H18O2
- MW
- 218.29 g/mol
VQ-048373
Cyclopropyl(4-(1-hydroxy-2-methylpropan-2-yl)phenyl)methanone
- CAS
- 169280-26-6
- Formula
- C14H18O2
- MW
- 218.29 g/mol
VQ-030722
Ethyl 2-(4-(1-hydroxy-4-(4-(hydroxydiphenylmethyl)piperidin-1-yl)butyl)phenyl)-2-methylpropanoate
- CAS
- 174483-06-8
- Formula
- C34H43NO4
- MW
- 529.7 g/mol
VQ-037250
Methyl 2-(3-(1-hydroxy-4-(4-(hydroxydiphenylmethyl)piperidin-1-yl)butyl)phenyl)-2-methylpropanoate
- CAS
- 1187954-56-8
- Formula
- C33H41NO4
- MW
- 515.68 g/mol
VQ-043654
Methyl 2-(3-(4-(4-(hydroxydiphenylmethyl)piperidin-1-yl)butanoyl)phenyl)-2-methylpropanoate
- CAS
- 937009-94-4
- Formula
- C33H39NO4
- MW
- 513.67 g/mol
VQ-048374
Methyl 2-(4-(4-Hydroxybutanoyl)phenyl)-2-methylpropanoate
- CAS
- 394222-30-1
- Formula
- C15H20O4
- MW
- 264.32 g/mol
VQ-048368
FAQs — Fexofenadine impurities
Which Fexofenadine impurities do you supply?
We list 42 Fexofenadine-related reference materials, including process impurities, degradation products, stable-isotope-labelled standards and related compounds. Each is supplied with a COA, and characterisation data (HPLC, 1H-NMR, MS, IR) can be provided on request.
What are Fexofenadine impurity standards used for?
They are used for analytical method development and validation, impurity identification and quantification, forced-degradation and stability studies, and to support ANDA, DMF and other regulatory submissions under ICH Q3A/Q3B (and ICH M7 for mutagenic impurities).
Can you synthesise a Fexofenadine impurity that is not listed?
Yes. Our custom synthesis service can prepare and characterise unlisted impurities, metabolites and labelled analogues from milligram to gram scale. Share the structure or name and required quantity for a quotation.
Request Fexofenadine impurity standards
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