Diphenhydramine is a first-generation antihistamine used to treat a number of conditions including allergic symptoms and itchiness, the common cold, insomnia, motion sickness, and extrapyramidal symptoms. It can also be used for insomnia, symptoms of the common cold, tremor in parkinsonism, and nausea.. Reference standards of Diphenhydramine API, and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below
N-Desmethyl Diphenhydramine Hydrochloride
Catalogue No.:PA 04 31010
CAS :
Molecular Formula : C16H20ClNO
Molecular Weight : 277.79
4-Methyldiphenhydramine Hydrochloride
Catalogue No.:PA 04 31020
Molecular Formula : C18H24ClNO
Molecular Weight : 305.84
Bromazine Hydrochloride
Catalogue No.:PA 04 31030
Molecular Formula : C17H21BrClNO
Molecular Weight : 370.71
Benzhydrol
Catalogue No.:PA 04 31040
Molecular Formula : C13H12O
Molecular Weight : 184.23
Benzophenone
Catalogue No.:PA 04 31050
Molecular Formula : C13H10O
Molecular Weight : 182.22
Diphenhydramine N-Oxide
Catalogue No.:PA 04 31510
Molecular Formula : C17H21NO2
Molecular Weight : 271.35
3-(Diphenylmethoxy)-1,2-propanediol
Catalogue No.:PA 04 0311000
Molecular Formula : C16H18O3
Molecular Weight : 258.32
2-[(RS)-(4-methylphenyl)phenylmethoxy]-N,N-dimethylethanamine
Catalogue No.:PA 04 31021
Molecular Formula : C18H23NO
Molecular Weight : 269.39
Diphenhydramine
Catalogue No.:PA 31 57000
Molecular Formula : C17H21NO
Molecular Weight : 255.35
2-(Diphenylmethoxy)-N,N,N-trimethylethanaminium Bromide
Catalogue No.:PA 04 31520
Molecular Formula : C18H24BrNO
Molecular Weight : 350.29
Diphenhydramine N-Oxide Hydrochloride
Catalogue No.:PA 04 31530
Molecular Formula : C17H22ClNO2
Molecular Weight : 307.82
2-(Benzhydryloxy)-N-methylacetamide
Catalogue No.:PA 04 31540
Molecular Formula : C16H17NO2
Molecular Weight : 255.31
Diphenhydramine Citrate
Catalogue No.:PA 04 31550
Molecular Formula : C23H29NO8
Molecular Weight : 447.48
N-Desmethyl Diphenhydramine-d3 Hydrochloride
Catalogue No.:PA STI 028280
Molecular Formula : C16H17D3ClNO
Molecular Weight : 280.81
Diphenhydramine-d6 N-β-D-Glucuronide
Catalogue No.:PA STI 035500
Molecular Formula : C23H23D6NO7
Molecular Weight : 437.52
Diphenhydramine-d6 N-Oxide
Catalogue No.:PA STI 035510
Molecular Formula : C17H15D6NO2
Molecular Weight : 277.39
Bromodiphenhydramine Hydrochloride (1077005)
Catalogue No.:PA USP1077005
Molecular Formula : NA
Molecular Weight : NA
Diphenhydramine N-Oxide (2-(benzhydryloxy)-N,N-dimethylethan-1-amine oxide hydrochloride) (1218050)
Catalogue No.:PA USP1218050
Diphenhydramine Hydrochloride (1218005)
Catalogue No.:PA USP1218005
Diphenhydramine Related Compound B (3-(benzhydryloxy)propane-1,2-diol) (1218027)
Catalogue No.:PA USP1218027
Diphenhydramine Related Compound A (2-(Diphenylmethoxy)-N-methylethanamine hydrochloride) (1218016)
Catalogue No.:PA USP1218016
Diphenhydramine Citrate (1217909)
Catalogue No.:PA USP1217909
diphenhydramine hydrochloride (896RB)
Catalogue No.:PA BP896RB
Catalogue No.:PA IPIPRS 26 11
Molecular Formula :
Diphenhydramine-d5 HCl (phenyl-d5)
Catalogue No.:PA STI 088325
Molecular Formula : C17H17D5ClNO
Molecular Weight : 296.85
2-[(RS)-(4-Bromophenyl)phenylmethoxy]-N,N-dimethylethanamine
Catalogue No.:PA 04 31031
Molecular Formula : C17H20BrNO
Molecular Weight : 334.26
2-Chloro(methylphenyl)phenylmethoxy Ethane Ether
Catalogue No.:PA 31 0571000
Molecular Formula : C16H17ClO
Molecular Weight : 260.76
Benzhydryl Bromide
Catalogue No.:PA 31 0571001
Molecular Formula : C13H11Br
Molecular Weight : 247.14
Benzeneacetic acid, a-methyl-4-(1-methylethyl)-
Catalogue No.:PA 31 0571002
Molecular Formula : C12H16O2
Molecular Weight : 192.26
4,4-Bis(diethylamino)benzophenone
Catalogue No.:PA 31 0571003
Molecular Formula : C21H28N2O
Molecular Weight : 324.47
N-Nitroso N-Desmethyl Diphenhydramine-D5
Catalogue No.:PA STI 089547
Molecular Formula : C16H13D5N2O2
Molecular Weight : 275.36
Diphenhydramine N-glucuronide
Catalogue No.:PA 31 0571004
Molecular Formula : C23H29NO7
Molecular Weight : 431.49
Diphenhydramine-d3 Dimer
Catalogue No.:PA STI 089733
Molecular Formula : C31H30D3NO2
Molecular Weight : 454.63
Diphenhydramine Impurity -A (IMP/25/18)
Catalogue No.:PA IMP 25 18
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