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Merck

1218005

USP

Diphenhydramine hydrochloride

United States Pharmacopeia (USP) Reference Standard

Synonym(s):

2-Diphenylmethoxy-N,N-dimethylethylamine hydrochloride, N-(2-Diphenylmethoxyethyl)-N,N-dimethylamine hydrochloride

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About This Item

Empirical Formula (Hill Notation):
C17H21NO · HCl
CAS Number:
Molecular Weight:
291.82
NACRES:
NA.24
PubChem Substance ID:
UNSPSC Code:
41116107
MDL number:
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grade

pharmaceutical primary standard

API family

diphenhydramine

manufacturer/tradename

USP

application(s)

pharmaceutical (small molecule)

format

neat

SMILES string

Cl[H].CN(C)CCOC(c1ccccc1)c2ccccc2

InChI

1S/C17H21NO.ClH/c1-18(2)13-14-19-17(15-9-5-3-6-10-15)16-11-7-4-8-12-16;/h3-12,17H,13-14H2,1-2H3;1H

InChI key

PCHPORCSPXIHLZ-UHFFFAOYSA-N

Gene Information

human ... HRH1(3269)

General description

This product is provided as delivered and specified by the issuing Pharmacopoeia. All information provided in support of this product, including SDS and any product information leaflets have been developed and issued under the Authority of the issuing Pharmacopoeia.For further information and support please go to the website of the issuing Pharmacopoeia.

Application

Diphenhydramine hydrochloride USP reference standard, intended for use in specified quality tests and assays as specified in the USP compendia. Also, for use with USP monographs such as:
  • Acetaminophen, Diphenhydramine Hydrochloride, and Pseudoephedrine Hydrochloride Tablets
  • Dimenhydrinate
  • Dimenhydrinate Tablets
  • Diphenhydramine and Phenylephrine Hydrochlorides Tablets
  • Diphenhydramine and Pseudoephedrine Capsules
  • Diphenhydramine Hydrochloride
  • Diphenhydramine Hydrochloride and Ibuprofen Capsules

Analysis Note

These products are for test and assay use only. They are not meant for administration to humans or animals and cannot be used to diagnose, treat, or cure diseases of any kind.  ​

Other Notes

Sales restrictions may apply.


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Warning

hcodes

Hazard Classifications

Acute Tox. 4 Oral

Storage Class

11 - Combustible Solids

flash_point_f

Not applicable

flash_point_c

Not applicable



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Olabisi Oduwole et al.
The Cochrane database of systematic reviews, 12(12), CD007094-CD007094 (2014-12-24)
Cough causes concern for parents and is a major cause of outpatient visits. It can impact on quality of life, cause anxiety and affect sleep in parents and children. Several remedies, including honey, have been used to alleviate cough symptoms.
Makiko Kido-Nakahara et al.
The Journal of clinical investigation, 124(6), 2683-2695 (2014-05-09)
In humans, pruritus (itch) is a common but poorly understood symptom in numerous skin and systemic diseases. Endothelin 1 (ET-1) evokes histamine-independent pruritus in mammals through activation of its cognate G protein-coupled receptor endothelin A receptor (ETAR). Here, we have
Takashi Koyanagi et al.
Xenobiotica; the fate of foreign compounds in biological systems, 44(10), 893-901 (2014-03-22)
1. The pharmacokinetics of acetaminophen (marker of gastric emptying), antipyrine (marker of hepatic metabolic activity and total body water), diazepam (lipophilic and highly distributed), diphenhydramine (hepatic blood flow-limited and alpha-1 acid glycoprotein bound) and ofloxacin (renally eliminated) were evaluated in