Diphenhydramine Hydrochloride

Diphenhydramine Hydrochloride is a first-generation ethanolamine H1-receptor antagonist with potent sedative and anticholinergic properties, the most widely used OTC sleep aid globally and a component of numerous cold, allergy and antiemetic combination products. Simson Pharma's Diphenhydramine Hydrochloride reference standard and impurities support the high-volume compendial testing this foundational antihistamine demands.

Simson Pharma Global Ltd. (UK) and Simson Pharma Global LLC (USA) supply high-quality Diphenhydramine Hydrochloride Reference Standards, pharmacopoeial reference materials, and its related impurities to pharmaceutical manufacturers, CROs, analytical laboratories, universities, and regulatory organizations worldwide. To service the Europe and America market efficiently, Simson Pharma Limited has set up Simson Pharma Global Ltd. in United Kingdom and Simson Pharma Global LLC in USA respectively.

Pharmaceutical Reference Standards / Impurity Standards

Diphenhydramine Hydrochloride
Diphenhydramine Hydrochloride
  • CAT. No.D440000
  • CAS. No.147-24-0
  • Mol. F.C17H21NO.HCl
  • Mol. W.291.82 g/mol
  • Stock Status:Instock
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Diphenhydramine Phosphate
Diphenhydramine Phosphate
  • CAT. No.D440000A
  • CAS. No.NA
  • Mol. F.C17H21NO.H3PO4
  • Mol. W.353.35 g/mol
  • Stock Status:Custom Synthesis
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Diphenhydramine
Diphenhydramine
  • CAT. No.D440000B
  • CAS. No.58-73-1
  • Mol. F.C17H21NO
  • Mol. W.255.35 g/mol
  • Stock Status:Instock
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Diphenhydramine Citrate
Diphenhydramine Citrate
  • CAT. No.D440000D
  • CAS. No.88637-37-0
  • Mol. F.C17H21NO.C6H8O7
  • Mol. W.447.48 g/mol
  • Stock Status:Custom Synthesis
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Diphenhydramine EP Impurity A
Diphenhydramine EP Impurity A
  • CAT. No.D440002
  • CAS. No.53499-40-4
  • Mol. F.C16H19NO.HCl
  • Mol. W.277.79 g/mol
  • Stock Status:Instock
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Dimenhydrinate EP Impurity F
Dimenhydrinate EP Impurity F
  • CAT. No.D440002A
  • CAS. No.17471-10-2
  • Mol. F.C16H19NO
  • Mol. W.241.33 g/mol
  • Stock Status:Instock
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Diphenhydramine EP Impurity B
Diphenhydramine EP Impurity B
  • CAT. No.D440003
  • CAS. No.4024-34-4
  • Mol. F.C18H23NO.HCl
  • Mol. W.305.84 g/mol
  • Stock Status:Instock
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Diphenhydramine EP Impurity C Hydrochloride Salt
Diphenhydramine EP Impurity C Hydrochloride Salt
  • CAT. No.D440004
  • CAS. No.1808-12-4
  • Mol. F.C17H20BrNO.HCl
  • Mol. W.370.71 g/mol
  • Stock Status:Instock
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Diphenhydramine N-Oxide
Diphenhydramine N-Oxide
  • CAT. No.D440005
  • CAS. No.3922-74-5
  • Mol. F.C17H21NO2
  • Mol. W.271.35 g/mol
  • Stock Status:Instock
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3-(Diphenylmethoxy)-1,2-propanediol
3-(Diphenylmethoxy)-1,2-propanediol
  • CAT. No.D440007
  • CAS. No.19574-66-4
  • Mol. F.C16H18O3
  • Mol. W.258.31 g/mol
  • Stock Status:Instock
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Diphenhydramine quaternary salt
Diphenhydramine quaternary salt
  • CAT. No.D440008
  • CAS. No.857158-22-6
  • Mol. F.C19H23NO3
  • Mol. W.313.40 g/mol
  • Stock Status:Instock
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N,N-Didesmethyldiphenhydramine
N,N-Didesmethyldiphenhydramine
  • CAT. No.D440009
  • CAS. No.17349-94-9
  • Mol. F.C15H17NO
  • Mol. W.227.30 g/mol
  • Stock Status:Instock
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Diphenylmethoxyacetic acid
Diphenylmethoxyacetic acid
  • CAT. No.D440010
  • CAS. No.21409-25-6
  • Mol. F.C15H14O3
  • Mol. W.242.27 g/mol
  • Stock Status:Instock
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N-Acetyl-N-desmethyldiphenhydramine
N-Acetyl-N-desmethyldiphenhydramine
  • CAT. No.D440011
  • CAS. No.109881-19-8
  • Mol. F.C17H19NO2
  • Mol. W.269.34 g/mol
  • Stock Status:Instock
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2-((2-(benzhydryloxy)ethyl)dimethylammonio)acetate
2-((2-(benzhydryloxy)ethyl)dimethylammonio)acetate
  • CAT. No.D440012
  • CAS. No.857158-22-6
  • Mol. F.C19H23NO3
  • Mol. W.313.39 g/mol
  • Stock Status:Instock
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Diphenhydramine N-Oxide Hydrochloride
Diphenhydramine N-Oxide Hydrochloride
  • CAT. No.D440013
  • CAS. No.13168-00-8
  • Mol. F.C17H22ClNO2
  • Mol. W.307.82 g/mol
  • Stock Status:Instock
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N-Nitroso Dimenhydrinate EP Impurity F
N-Nitroso Dimenhydrinate EP Impurity F
  • CAT. No.D440014
  • CAS. No.55855-43-1
  • Mol. F.C16H18N2O2
  • Mol. W.270.33 g/mol
  • Stock Status:Instock
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Diphenhydramine Methiodide
Diphenhydramine Methiodide
  • CAT. No.D440016
  • CAS. No.14177-81-2
  • Mol. F.C18H24NO.I
  • Mol. W.397.29 g/mol
  • Stock Status:Custom Synthesis
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Diphenhydramine N-methylated
Diphenhydramine N-methylated
  • CAT. No.D440017
  • CAS. No.29869-74-7
  • Mol. F.C18H24NO
  • Mol. W.270.39 g/mol
  • Stock Status:Custom Synthesis
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Isotope Labelled Compounds

Diphenhydramine-d5
Diphenhydramine-d5
  • CAT. No.D440006
  • CAS. No.1219908-66-3
  • Mol. F.C17H16NOD5
  • Mol. W.260.39 g/mol
  • Stock Status:Instock
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Diphenhydramine d5 Hydrochloride
Diphenhydramine d5 Hydrochloride
  • CAT. No.D440006A
  • CAS. No.1219795-16-0
  • Mol. F.C17H16O5NO.HCl
  • Mol. W.296.84 g/mol
  • Stock Status:Instock
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N-Nitroso N-Desmethyl Diphenhydramine D5
N-Nitroso N-Desmethyl Diphenhydramine D5
  • CAT. No.D440015
  • CAS. No.NA
  • Mol. F.C16H13D5N2O2
  • Mol. W.275.36 g/mol
  • Stock Status:Instock
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Diphenhydramine D3
Diphenhydramine D3
  • CAT. No.D440018
  • CAS. No.NA
  • Mol. F.C17H18D3NO
  • Mol. W.258.37 g/mol
  • Stock Status:Custom Synthesis
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