diphenhydramine

Modify Date: 2025-08-20 10:13:33

diphenhydramine Structure
diphenhydramine structure
Common Name diphenhydramine
CAS Number 58-73-1 Molecular Weight 255.355
Density 1.0±0.1 g/cm3 Boiling Point 343.7±27.0 °C at 760 mmHg
Molecular Formula C17H21NO Melting Point 167-172°C
MSDS N/A Flash Point 101.5±26.0 °C

 Use of diphenhydramine


Diphenhydramine is a first-generation histamine H1-receptor antagonist with anti-cholinergic effect. Diphenhydramine hydrochloride can across the ovine blood-brain barrier (BBB)[1][2].

 Names

Name diphenhydramine
Synonym More Synonyms

 diphenhydramine Biological Activity

Description Diphenhydramine is a first-generation histamine H1-receptor antagonist with anti-cholinergic effect. Diphenhydramine hydrochloride can across the ovine blood-brain barrier (BBB)[1][2].
Related Catalog
References

[1]. Jason P Berninger, et al. Effects of the antihistamine diphenhydramine on selected aquatic organisms. Environ Toxicol Chem. 2011 Sep;30(9):2065-72.

 Chemical & Physical Properties

Density 1.0±0.1 g/cm3
Boiling Point 343.7±27.0 °C at 760 mmHg
Melting Point 167-172°C
Molecular Formula C17H21NO
Molecular Weight 255.355
Flash Point 101.5±26.0 °C
Exact Mass 255.162308
PSA 12.47000
LogP 3.66
Vapour Pressure 0.0±0.8 mmHg at 25°C
Index of Refraction 1.551

 Toxicological Information

CHEMICAL IDENTIFICATION

RTECS NUMBER :
KR6825000
CHEMICAL NAME :
Ethylamine, 2-(diphenylmethoxy)-N,N-dimethyl-
CAS REGISTRY NUMBER :
58-73-1
BEILSTEIN REFERENCE NO. :
1914136
LAST UPDATED :
199806
DATA ITEMS CITED :
25
MOLECULAR FORMULA :
C17-H21-N-O
MOLECULAR WEIGHT :
255.39
WISWESSER LINE NOTATION :
1N1&2OYR&R

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Human
DOSE/DURATION :
714 ug/kg
TOXIC EFFECTS :
Behavioral - somnolence (general depressed activity) Behavioral - alteration of operant conditioning Behavioral - changes in psychophysiological tests
TYPE OF TEST :
LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE :
Unreported
SPECIES OBSERVED :
Human - man
DOSE/DURATION :
7353 ug/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Multiple routes
SPECIES OBSERVED :
Human - woman
DOSE/DURATION :
793 ug/kg/1H-I
TOXIC EFFECTS :
Behavioral - hallucinations, distorted perceptions Behavioral - ataxia Behavioral - muscle contraction or spasticity
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
390 mg/kg
TOXIC EFFECTS :
Behavioral - convulsions or effect on seizure threshold Behavioral - changes in motor activity (specific assay)
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Intraperitoneal
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
280 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Subcutaneous
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
474 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Intravenous
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
42 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
160 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Intraperitoneal
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
56 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Subcutaneous
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
50 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Intravenous
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
29 mg/kg
TOXIC EFFECTS :
Behavioral - convulsions or effect on seizure threshold Behavioral - changes in motor activity (specific assay)
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Intraperitoneal
SPECIES OBSERVED :
Rodent - guinea pig
DOSE/DURATION :
75 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Subcutaneous
SPECIES OBSERVED :
Rodent - guinea pig
DOSE/DURATION :
56 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Subcutaneous
DOSE :
440 mg/kg
SEX/DURATION :
female 1-22 day(s) after conception
TOXIC EFFECTS :
Reproductive - Maternal Effects - other effects
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Subcutaneous
DOSE :
440 mg/kg
SEX/DURATION :
female 1-22 day(s) after conception
TOXIC EFFECTS :
Reproductive - Effects on Newborn - growth statistics (e.g.%, reduced weight gain)
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Subcutaneous
DOSE :
240 mg/kg
SEX/DURATION :
female 6 day(s) pre-mating
TOXIC EFFECTS :
Reproductive - Fertility - female fertility index (e.g. # females pregnant per # sperm positive females; # females pregnant per # females mated)
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Unreported
DOSE :
20 mg/kg
SEX/DURATION :
female 1 day(s) pre-mating
TOXIC EFFECTS :
Reproductive - Fertility - other measures of fertility

MUTATION DATA

TYPE OF TEST :
Cytogenetic analysis
TEST SYSTEM :
Human Fibroblast
DOSE/DURATION :
100 mg/L
REFERENCE :
ACYTAN Acta Cytologica. (Science Printers and Pub., Inc., 2 Jacklynn Ct., St. Louis, MO 63132) V.1- 1957- Volume(issue)/page/year: 16,41,1972 *** REVIEWS *** TOXICOLOGY REVIEW JRPMAP Journal of Reproductive Medicine. (2 Jacklynn Ct., St. Louis, MO 63132) V.3- 1969- Volume(issue)/page/year: 12,27,1974 TOXICOLOGY REVIEW ADVPA3 Advances in Pharmacology. (New York, NY) V.1-6, 1962-68. For publisher information, see AVPCAQ. Volume(issue)/page/year: 4,263,1966 *** NIOSH STANDARDS DEVELOPMENT AND SURVEILLANCE DATA *** NIOSH OCCUPATIONAL EXPOSURE SURVEY DATA : NOES - National Occupational Exposure Survey (1983) NOES Hazard Code - X5089 No. of Facilities: 19 (estimated) No. of Industries: 1 No. of Occupations: 4 No. of Employees: 679 (estimated) No. of Female Employees: 370 (estimated)

 Safety Information

Hazard Codes Xi
HS Code 2922199090

 Synthetic Route

 Customs

HS Code 2922199090
Summary 2922199090. other amino-alcohols, other than those containing more than one kind of oxygen function, their ethers and esters; salts thereof. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:30.0%

 Synonyms

2-benzhydryloxy-N,N-dimethylethanamine
Antamin
b-Dimethylaminoethyl Benzhydryl Ether
EINECS 200-396-7
Cetamin
DPH (VAN)
Diphenhydramine Base
MFCD00274173
2-Diphenylmethoxy-N,N-dimethylethanamine
2-(Diphenylmethoxy)-N,N-dimethylethanamine
N-[2-(BENZHYDRYLOXY)ETHYL]-N,N-DIMETHYLAMINE
a-(2-Dimethylaminoethoxy)diphenylmethane
Ethanamine, 2-(diphenylmethoxy)-N,N-dimethyl-
Benzhydramine
2-[(diphenylmethyl)oxy]-N,N-dimethylethanamine
Dibendrin
DPH
diphenhydramine
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