Naphazoline hydrochloride

Modify Date: 2025-08-22 22:32:42

Naphazoline hydrochloride Structure
Naphazoline hydrochloride structure
 Common Name Naphazoline hydrochloride
CAS Number 550-99-2 Molecular Weight 246.735
Density 1.15 g/cm3 Boiling Point 440.5ºC at 760 mmHg
Molecular Formula C14H15ClN2 Melting Point 254-260 °C
MSDS Chinese USA Flash Point 220.2ºC
Symbol GHS06
GHS06		 Signal Word Danger

 Use of Naphazoline hydrochloride


Naphazoline HCl is an ocular vasoconstrictor and imidazoline derivative sympathomimetic amine.Target: Adrenergic Receptorphazoline hydrochloride is the common name for 2-(1-naphthylmethyl)-2-imidazoline hydrochloride. It is a sympathomimetic agent with marked alpha adrenergic activity. It is a vasoconstrictor with a rapid action in reducing swelling when applied to mucous membrane. It acts on alpha-receptors in the arterioles of the conjunctiva to produce constriction, resulting in decreased congestion. It is an active ingredient in several over-the-counter formulations including Clear Eyes and Naphcon eye drops. From Wikipedia.

 Names

Name Naphazoline hydrochloride
Synonym More Synonyms

 Naphazoline hydrochloride Biological Activity

Description Naphazoline HCl is an ocular vasoconstrictor and imidazoline derivative sympathomimetic amine.Target: Adrenergic Receptorphazoline hydrochloride is the common name for 2-(1-naphthylmethyl)-2-imidazoline hydrochloride. It is a sympathomimetic agent with marked alpha adrenergic activity. It is a vasoconstrictor with a rapid action in reducing swelling when applied to mucous membrane. It acts on alpha-receptors in the arterioles of the conjunctiva to produce constriction, resulting in decreased congestion. It is an active ingredient in several over-the-counter formulations including Clear Eyes and Naphcon eye drops. From Wikipedia.
Related Catalog
References

[1]. http://en.wikipedia.org/wiki/Naphazoline

 Chemical & Physical Properties

Density 1.15 g/cm3
Boiling Point 440.5ºC at 760 mmHg
Melting Point 254-260 °C
Molecular Formula C14H15ClN2
Molecular Weight 246.735
Flash Point 220.2ºC
Exact Mass 246.092377
PSA 24.39000
LogP 2.95040
InChIKey DJDFFEBSKJCGHC-UHFFFAOYSA-N
SMILES Cl.c1ccc2c(CC3=NCCN3)cccc2c1
Water Solubility 170 g/L (20 ºC)

 Toxicological Information

CHEMICAL IDENTIFICATION

RTECS NUMBER :
NJ4375000
CHEMICAL NAME :
2-Imidazoline, 2-(1-naphthylmethyl)-, monohydrochloride
CAS REGISTRY NUMBER :
550-99-2
LAST UPDATED :
199610
DATA ITEMS CITED :
11
MOLECULAR FORMULA :
C14-H14-N2.Cl-H
MOLECULAR WEIGHT :
246.76
WISWESSER LINE NOTATION :
L66J B1- BT5M CN BUTJ &GH

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Intraperitoneal
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
50 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
JPETAB Journal of Pharmacology and Experimental Therapeutics. (Williams & Wilkins Co., 428 E. Preston St., Baltimore, MD 21202) V.1- 1909/10- Volume(issue)/page/year: 86,284,1946
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Subcutaneous
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
200 mg/kg
TOXIC EFFECTS :
Lungs, Thorax, or Respiration - respiratory stimulation
REFERENCE :
SMWOAS Schweizerische Medizinische Wochenschrift. (Schwabe & Co., Steintorst 13, 4010 Basel, Switzerland) V.50- 1920- Volume(issue)/page/year: 71,554,1941
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Intravenous
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
6 mg/kg
TOXIC EFFECTS :
Behavioral - somnolence (general depressed activity) Behavioral - convulsions or effect on seizure threshold Lungs, Thorax, or Respiration - dyspnea
REFERENCE :
JPETAB Journal of Pharmacology and Experimental Therapeutics. (Williams & Wilkins Co., 428 E. Preston St., Baltimore, MD 21202) V.1- 1909/10- Volume(issue)/page/year: 113,341,1955
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Intraperitoneal
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
50 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
EJMCA5 European Journal of Medicinal Chemistry--Chimie Therapeutique. (Editions Scientifiques Elsevier, 29 rue Buffon, F-75005, Paris, France) V.9- 1974- Volume(issue)/page/year: 28,761,1993
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Subcutaneous
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
170 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
JPETAB Journal of Pharmacology and Experimental Therapeutics. (Williams & Wilkins Co., 428 E. Preston St., Baltimore, MD 21202) V.1- 1909/10- Volume(issue)/page/year: 86,280,1946
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Intravenous
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
16500 ug/kg
TOXIC EFFECTS :
Behavioral - somnolence (general depressed activity) Behavioral - convulsions or effect on seizure threshold Lungs, Thorax, or Respiration - dyspnea
REFERENCE :
JPETAB Journal of Pharmacology and Experimental Therapeutics. (Williams & Wilkins Co., 428 E. Preston St., Baltimore, MD 21202) V.1- 1909/10- Volume(issue)/page/year: 113,341,1955
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - rabbit
DOSE/DURATION :
50 mg/kg
TOXIC EFFECTS :
Lungs, Thorax, or Respiration - respiratory stimulation
REFERENCE :
SMWOAS Schweizerische Medizinische Wochenschrift. (Schwabe & Co., Steintorst 13, 4010 Basel, Switzerland) V.50- 1920- Volume(issue)/page/year: 71,554,1941
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Subcutaneous
SPECIES OBSERVED :
Rodent - rabbit
DOSE/DURATION :
4 mg/kg
TOXIC EFFECTS :
Lungs, Thorax, or Respiration - respiratory stimulation
REFERENCE :
SMWOAS Schweizerische Medizinische Wochenschrift. (Schwabe & Co., Steintorst 13, 4010 Basel, Switzerland) V.50- 1920- Volume(issue)/page/year: 71,554,1941
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Intravenous
SPECIES OBSERVED :
Rodent - rabbit
DOSE/DURATION :
800 ug/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
JPETAB Journal of Pharmacology and Experimental Therapeutics. (Williams & Wilkins Co., 428 E. Preston St., Baltimore, MD 21202) V.1- 1909/10- Volume(issue)/page/year: 86,284,1946
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Intramuscular
SPECIES OBSERVED :
Rodent - rabbit
DOSE/DURATION :
950 ug/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
JPETAB Journal of Pharmacology and Experimental Therapeutics. (Williams & Wilkins Co., 428 E. Preston St., Baltimore, MD 21202) V.1- 1909/10- Volume(issue)/page/year: 86,284,1946 *** NIOSH STANDARDS DEVELOPMENT AND SURVEILLANCE DATA *** NIOSH OCCUPATIONAL EXPOSURE SURVEY DATA : NOES - National Occupational Exposure Survey (1983) NOES Hazard Code - X3737 No. of Facilities: 73 (estimated) No. of Industries: 1 No. of Occupations: 2 No. of Employees: 1374 (estimated) No. of Female Employees: 1038 (estimated)

 Safety Information

Symbol GHS06
GHS06
Signal Word Danger
Hazard Statements H300
Precautionary Statements Missing Phrase - N15.00950417
Personal Protective Equipment Eyeshields;Faceshields;Gloves;type P2 (EN 143) respirator cartridges
Hazard Codes T:Toxic
Risk Phrases R20/21/22;R23/24/25
Safety Phrases S45-S36/37/39-S24/25
RIDADR UN 2811 6.1/PG 2
WGK Germany 3
RTECS NJ4375000
Packaging Group III
Hazard Class 6.1
HS Code 2934999090

 Customs

HS Code 2934999090
Summary 2934999090. other heterocyclic compounds. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

 Articles27

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Report: Simultaneous determination of naphazoline hydrochloride, chlorpheniramine maleate and methylene blue in their ternary mixture.

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Validated spectrophotometric and chemometric methods were developed for determination of Naphazoline Hydrochloride (NAP), Chlorpheniramine maleate (CLO) and Methylene blue (MB) in their ternary mixtur...

Method development for impurity profiling in SFC: The selection of a dissimilar set of stationary phases.

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 Naphazoline hydrochlorideBioassay

View more

Name: Inhibition of SARS-CoV-2-induced cytopathy was measured 4 days after infection of EGF...
Source: ChEMBL
Target: Severe acute respiratory syndrome coronavirus 2
External Id: CHEMBL5303712
Name: Inhibition of neurosphere proliferation of mouse neural precursor cells by MTT assay
Source: ChEMBL
Target: N/A
External Id: CHEMBL1266185
Name: Primary qHTS assay for inhibitors of alpha-synuclein gene (SNCA) expression
Source: NCGC
External Id: SNCA-p-activity-luciferase
Name: Fluorescence-based cell-based primary high throughput screening assay to identify ago...
Source: The Scripps Research Institute Molecular Screening Center
Target: muscarinic acetylcholine receptor M1 [Homo sapiens]
External Id: CHRM1_AG_FLUO8_1536_1X%ACT PRUN
Name: Cytochrome P450 Family 1 Subfamily A Member 2 (CYP1A2) small molecule antagonists: lu...
Source: 824
External Id: CYP273
Name: Fluorescence-based cell-based primary high throughput screening assay to identify pos...
Source: The Scripps Research Institute Molecular Screening Center
Target: muscarinic acetylcholine receptor M1 [Homo sapiens]
External Id: CHRM1_PAM_FLUO8_1536_1X%ACT PRUN
Name: qHTS Assay for Small Molecule Inhibitors of the Human hERG Channel Activity
Source: NCGC
External Id: HERG01
Name: qHTS for Inhibitors of TGF-b: Cytotox Counterscreen
Source: NCGC
Target: N/A
External Id: SMAD3201
Name: uHTS identification of cystic fibrosis induced NFkb Inhibitors in a fluoresence assay
Source: Burnham Center for Chemical Genomics
Target: cystic fibrosis transmembrane conductance regulator [Homo sapiens]
External Id: SBCCG-A764-CF-PAF-Primary-Assay
Name: Fluorescence-based cell-based primary high throughput screening assay to identify ant...
Source: The Scripps Research Institute Molecular Screening Center
Target: muscarinic acetylcholine receptor M1 [Homo sapiens]
External Id: CHRM1_ANT_FLUO8_1536_1X%INH PRUN
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 Synonyms

Naphcon
2-(naphthalen-1-ylmethyl)-4,5-dihydro-1H-imidazole hydrochloride (1:1)
2-(naphthalen-1-ylmethyl)-4,5-dihydro-1H-imidazole,hydrochloride
Naphazoline hydrochloride
EINECS 208-989-2
2-(1-naphthylmethyl)-4,5-dihydro-1H-imidazole hydrochloride
2-(1-Naphthylmethyl)-4,5-dihydro-1H-imidazole hydrochloride (1:1)
1H-Imidazole, 4,5-dihydro-2-(1-naphthalenylmethyl)-, hydrochloride (1:1)
MFCD00012554
2-(1-Naphthylmethyl)-2-imidazoline hydrochloride
Naphazoline (hydrochloride)
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