Impurity reference standards
Diphenhydramine impurities & reference standards
Characterised Diphenhydramine impurities, degradation products and related compounds for analytical method development, validation, QC release and regulatory filings.
18reference materials
1isotope-labelled
COAHPLC · NMR · MS on request
Parent API: Diphenhydramine HCl
147-24-0 · C17H22ClNO
Diphenhydramine EP Impurity C (Freebase)/Dimenhydrinate EP Impurity H(Freebase)
- CAS
- 118-23-0
- Formula
- C17H20BrNO
- MW
- 334.2 g/mol
VQ-006336
Diphenhydramine EP Impurity C (HCl)/Dimenhydrinate EP Impurity H(HCl)
- CAS
- 1808-12-4
- Formula
- C17H21BrClNO
- MW
- 370.7 g/mol
In stock
FAQs — Diphenhydramine impurities
Which Diphenhydramine impurities do you supply?
We list 18 Diphenhydramine-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 Diphenhydramine 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 Diphenhydramine 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 Diphenhydramine impurity standards
We reply within one business day with price, pack options, lead time and documentation.