Skip to Content
Merck
All Photos(1)

Key Documents

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

Sign Into View Organizational & Contract Pricing


About This Item

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

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)

Looking for similar products? Visit Product Comparison Guide

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.

related product

Product No.
Description
Pricing

Pictograms

Exclamation mark

Signal Word

Warning

Hazard Statements

Precautionary Statements

Hazard Classifications

Acute Tox. 4 Oral

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable


Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

Already Own This Product?

Find documentation for the products that you have recently purchased in the Document Library.

Visit the Document Library

Customers Also Viewed

Slide 1 of 2

1 of 2

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.
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
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
Shigeru Hishinuma et al.
Biochemical pharmacology, 91(2), 231-241 (2014-07-30)
Differential binding sites for first- and second-generation antihistamines were indicated on the basis of the crystal structure of human histamine H1 receptors. In this study, we evaluated differences between the thermodynamic driving forces of first- and second-generation antihistamines for human
Jung Yeon Kim et al.
Biomedical chromatography : BMC, 29(3), 465-474 (2014-08-01)
The purpose of this study was to develop and validate an ultra-performance liquid chromatography method for simultaneous analysis of 20 antihistamines (illegal additives) in dietary supplements. The limits of detection and quantitation of the method ranged from 1.5 to 2.5

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service