Naphazolin hCL USP
Naphazolin hCL USP (Naphazolin HCL) is a topical sympathomimetic agent commonly used as a nasal decongestant and ophthalmic vasoconstrictor. It is a white to off-white crystalline powder soluble in water and alcohol. Naphazolin HCL works by constricting blood vessels, reducing swelling and redness in mucous membranes and eyes. It is widely used in pharmaceutical formulations such as nasal sprays and eye drops.
Naphazolin hCL USP
Primary Uses
- Nasal Decongestant
- Used in nasal sprays and drops to relieve nasal congestion caused by colds, allergies, sinusitis, and other upper respiratory tract infections.
- Effective in reducing nasal mucosa swelling and improving airflow by vasoconstriction.
- Commonly found in over-the-counter and prescription nasal decongestant products.
- Ophthalmic Vasoconstrictor
- Used in eye drops to relieve redness caused by minor eye irritations, allergies, conjunctivitis, and dryness.
- Provides temporary relief by constricting conjunctival blood vessels, reducing eye redness and swelling.
- Utilized in pre- and post-operative eye care to reduce ocular congestion.
Secondary Uses
- Combination Pharmaceutical Products
- Incorporated with antihistamines, analgesics, or corticosteroids to provide combined relief of allergy symptoms or eye conditions.
- Veterinary Applications
- Used in veterinary ophthalmic and nasal preparations for similar vasoconstrictive effects in animals.
- Emergency Medical Use
- Occasionally used in emergency nasal or ocular care to quickly reduce swelling and improve breathing or vision clarity.
- Research and Diagnostic Use
- Used in laboratories and research for studies involving vasoconstriction and drug efficacy related to mucous membranes and ocular tissues.
- Adjunct in Treatment of Allergic Rhinitis
- Used as supportive therapy to alleviate nasal congestion associated with allergic rhinitis.
1. Basic Identification Attributes
- Chemical Name (IUPAC): 2-(1-Naphthyl)-N,N-dimethyl-2-imidazoline hydrochloride
- Common/Trade Name: Naphazolin HCL, Naphazoline Hydrochloride
- CAS Number: 147-69-7
- HS Code: 2933.99.90
- Synonyms: Naphazoline hydrochloride; Naphazoline HCl
2. Physical & Chemical Properties
- Physical State: White to off-white crystalline powder
- Color & Odor: White; odorless
- Solubility: Freely soluble in water and alcohol
- Melting Point: 170–175°C (decomposes)
- pH (1% aqueous solution): Approximately 4.5–5.5
3. Safety & Hazard Attributes
- GHS Classification: Not classified as hazardous under normal pharmaceutical use
- Toxicity: Low toxicity at therapeutic doses; overdose can cause systemic effects
- Exposure Limits: N/A for pharmaceutical-grade product
4. Storage & Handling Attributes
- Storage Conditions: Store in a cool, dry place protected from light
- Container Type: Supplied in airtight containers or pharmaceutical packaging
- Shelf Life: Typically 2–3 years if stored properly
- Handling Precautions: Avoid inhalation of powder and contact with eyes (undiluted)
5. Regulatory & Compliance Attributes
- Complies with USP (United States Pharmacopeia) standards
- Registered under relevant pharmaceutical regulatory authorities (FDA, EMA, etc.)
6. Environmental & Health Impact
- Biodegradability: Data not applicable due to pharmaceutical use
- Ecotoxicity: Low risk due to controlled medical use
- Bioaccumulation: Not applicable
- Carcinogenicity/Mutagenicity: Not classified as carcinogenic
Safety Handling Precautions
- PPE Required: Gloves recommended during handling of raw powder
- Handling Guidelines: Avoid dust generation; handle in well-ventilated area
- Storage Measures: Keep container tightly closed; protect from moisture and light
First Aid Measures
- Inhalation: Move to fresh air; seek medical attention if symptoms develop
- Skin Contact: Wash with soap and water; seek medical advice if irritation occurs
- Eye Contact: Rinse thoroughly with water; seek medical attention if irritation persists
- Ingestion: Seek immediate medical attention; do not induce vomiting unless directed
Firefighting Measures
- Fire Hazards: Not highly flammable but combustible
- Extinguishing Media: Use water spray, foam, dry chemical, or CO₂
- Special Precautions: Wear protective equipment to avoid inhalation of dust
- Hazardous Combustion Products: May produce nitrogen oxides and other toxic fumes
Related products
Cetirizine Dihydrochloride
Chloramphenicol Palmitate Micronised
Dicyclomine Hydrochloride
Diloxanide Furoate
Doxycycline Hyclate BP
Ivermectin BP Vet
Methyl Salicylate BP
Miconazole Nitrate BP
Miconazole Nitrate BP is a high-purity, pharmaceutical-grade antifungal agent conforming to British Pharmacopoeia (BP) specifications. It is widely used in the formulation of topical and oral pharmaceutical products for the treatment of fungal infections caused by dermatophytes and yeasts, including Candida species. Miconazole Nitrate functions by inhibiting the biosynthesis of ergosterol, a vital component of fungal cell membranes, leading to cell death.
This white to off-white crystalline powder is highly effective and exhibits broad-spectrum antifungal and some antibacterial activity. It is commonly utilized in creams, ointments, powders, and gel formulations.

Preservatives(food)
Flavor Enhancers
Acidulants
Sweeteners
Antioxidants
Colorants(food)
Nutraceutical Ingredients (food)
Nutrient Supplements
Emulsifiers
Collectors
Dust Suppressants
Explosives and Blasting Agents
Flocculants and Coagulants
Frothers
Leaching Agents
pH Modifiers
Precious Metal Extraction Agents
Antioxidants(plastic)
Colorants (Pigments, Dyes)
Fillers and Reinforcements
Flame Retardants
Monomers
Plasticizers
Polymerization Initiators
Stabilizers (UV, Heat)
Antifoaming Agents
Chelating Agents
Coagulants and Flocculants
Corrosion Inhibitors
Disinfectants and Biocides
Oxidizing Agents
pH Adjusters
Scale Inhibitors( water)
Antioxidants(cosmetic)
Emollients
Fragrances and Essential Oils
Humectants
Preservatives
Surfactants(cosmetic)
Thickeners
UV Filters
Fertilizers
Soil Conditioners
Plant Growth Regulators
Animal Feed Additives
Biostimulants
Pesticides (Herbicides, Insecticides, Fungicides)
Active Pharmaceutical Ingredients (APIs)
Excipients
Solvents(pharmaceutical)
Antibiotics
Antiseptics and Disinfectants
Vaccine Adjuvants
Nutraceutical Ingredients (pharmaceutical)
Analgesics & Antipyretics
Analytical Reagents
Solvents(lab)
Chromatography Chemicals
Spectroscopy Reagents
microbiology-and-cell-culture-reagents
Molecular Biology Reagents
Biochemical Reagents
Inorganic and Organic Standards
Laboratory Safety Chemicals
Specialty Laboratory Chemicals(Special Laboratory Equipment)
Demulsifiers
Hydraulic Fracturing Fluids
Scale Inhibitors(oil)
Surfactants(oil)
Drilling Fluids
Dyes and Pigments
Bleaching Agents
Softening Agents
Finishing Agents
Antistatic Agents
Admixtures
Waterproofing Agents
Sealants and Adhesives
Curing Compounds
Concrete Repair Chemicals
Anti-Corrosion Coatings
Surfactants(cleaning)
Builders
Enzymes
Solvents (Cleaning)
Fragrances
Electronic Chemicals
Catalysts
Lubricants
Photographic Chemicals
Refrigerants
Automotive chemicals
Pyrotechnic Chemicals
Biodegradable Surfactants
Bio-based Solvents
Renewable Polymers
Carbon Capture Chemicals
Wastewater Treatment Chemicals
Pigments
Solvents(paint)
Specialty Coatings
Binders/Resins
Additives
Driers
Anti-Corrosion Agents
Functional Coatings
Application-Specific Coatings
Fresh Herbs
Ground Spices
Whole Spices
Spice Blends
Dried Herbs
Leavening Agents
Dough Conditioners
Flour Treatments
Fat Replacers
Decoratives
Preservatives(baking)
Plasticizers & Softeners
Reinforcing Agents
Adhesion Promoters
Vulcanizing Agents
Antidegradants
Blowing Agents
Fillers & Extenders
Accelerators & Retarders