040-000-254 Naphazoline Hydrochloride, CAS 550-99-2

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Synonyms 2-(1-Naphthylmethyl)imidazoline hydrochloride; 4,5-Dihydro-2-(1-naphthalenylmethyl)-1H-imidazole Hydrochloride;4,5-Dihydro-2-(1-naphthalenylmethyl)- 1H-Imidazole Monohydrochloride; Sanorin-Spofa; Strictylon; Vasocon
Keywords Vasoconstrictor, nose congestion
Related products Sulfacetamide Sodium Salt


Naphazoline Hydrochloride Specifications

Product Name Naphazoline Hydrochloride
CAS Registry Number 550-99-2
Molecular Formula C14H14N2 · HCl
Molecular Weight 246.74
Purity >99%
Melting point 257-261℃
Appearance White powder
Shelf life 2 years
Functions Vasoconstrictor, treatment of allergic rhinitis, inflammatory nasal congestion, acute and chronic rhinitis. Treatment of conjunctivitis
Solubility Soluble in water, alcohol, DMSO, ethanol

Naphazoline Hydrochloride Description

Naphazoline hydrochloride is a vascular alpha 1 receptor agonist that shrinks the blood vessels. Formulations containing naphazoline have been used to treat allergic conjunctivitis and nasal decongestants. It is also an ingredient of eye drops that relieves congestion caused by inflammation of the eye.

Naphazoline Hydrochloride Applications

  • As an ingredient in eye drops to cure conjunctivitis
  • Used in the treatment of allergic rhinitis, inflammatory nasal congestion, acute and chronic rhinitis.

naphazoline hydrochloride application


  1. Miller J; Wolf EH. Antazoline phosphate and naphazoline hydrochloride, singly and in combination for the treatment of allergic conjunctivitis-a controlled double-blind clinical trial. Europe PMC. 1998, 35, (2), 81-86.
  2. Shizhong Zhu; Yang Liu. Spectroscopic analyses the interaction of Naphazoline hydrochloride with bovine serum albumin. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy. 2015, 98, 142-147.
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Naphazoline Hydrochloride
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by Joe J on Naphazoline Hydrochloride

Been using this product for years with no issues. It comes in a larger size, moisturizes properly and works well.