Naphazoline hydrochloride
- CAS No.
- 550-99-2
- Chemical Name:
- Naphazoline hydrochloride
- Synonyms
- NAPHAZOLINE HCL;Naphazoline hydrochloride (Naphcon);4,5-DIHYDRO-2-(1-NAPHTHYLMETHYL)-1H-IMIDAZOLE HYDROCHLORIDE;clera;niazol;coldan;naphcon;rhinoperd;rhinantin;stricylon
- CBNumber:
- CB1412136
- Molecular Formula:
- C14H14N2.ClH
- Molecular Weight:
- 246.74
- MDL Number:
- MFCD00012554
- MOL File:
- 550-99-2.mol
- MSDS File:
- SDS
- TDS File:
- TDS
| Product description | Number | Pack Size | Price |
| Naphazoline hydrochloride | N5504 | 25g | $79.7 |
| Naphazoline hydrochloride European Pharmacopoeia (EP) Reference Standard | N0080000 | 60 mg | $175 |
| Naphazoline hydrochloride United States Pharmacopeia (USP) Reference Standard | 1457006 | 200mg | $416 |
| Naphazoline hydrochloride European Pharmacopoeia (EP) Reference Standard | N0080000 | 50 mg | $164 |
| Naphazoline Hydrochloride >99.0%(T) | N0542 | 10g | $32 |
| More product size | |||
| Melting point | 254-260 °C |
|---|---|
| storage temp. | Keep in dark place,Inert atmosphere,Room temperature |
| solubility | Freely soluble in water, soluble in ethanol (96 per cent). |
| pka | pKa (25°C) 10.35 ±0.02, (35°C) 10.13 ±0.02, (45°C) 9.92 ±0.03; pKa (25°C) 10.35 ±0.02, (35°C) 10.13 ±0.02, (45°C) 9.92 ±0.03 |
| form | Crystalline Powder |
| color | White |
| PH | pH (50g/l, 25℃) : 4.0～6.0 |
| Water Solubility | 170 g/L (20 ºC) |
| Sensitive | Hygroscopic |
| Merck | 14,6368 |
| BRN | 3716843 |
| Stability | Hygroscopic |
| Major Application | pharmaceutical (small molecule) |
| Cosmetics Ingredients Functions | SKIN CONDITIONING - MISCELLANEOUS |
| InChI | InChI=1S/C14H14N2.ClH/c1-2-7-13-11(4-1)5-3-6-12(13)10-14-15-8-9-16-14;/h1-7H,8-10H2,(H,15,16);1H |
| InChIKey | DJDFFEBSKJCGHC-UHFFFAOYSA-N |
| SMILES | C(C1C2C(=CC=CC=2)C=CC=1)C1NCCN=1.[H]Cl |
| CAS DataBase Reference | 550-99-2(CAS DataBase Reference) |
| FDA 21 CFR | 341.20 |
| EWG's Food Scores | 1 |
| FDA UNII | MZ1131787D |
| UNSPSC Code | 41116107 |
| NACRES | NA.77 |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |  GHS06 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Signal word | Danger | |||||||||
| Hazard statements | H300 | |||||||||
| Precautionary statements | P264-P270-P301+P310+P330-P405-P501-P301+P310a-P321-P501a | |||||||||
| Hazard Codes | T,Xn | |||||||||
| Risk Statements | 25-23/24/25-20/21/22 | |||||||||
| Safety Statements | 45-36/37/39-24/25 | |||||||||
| RIDADR | UN 2811 6.1/PG 2 | |||||||||
| WGK Germany | 3 | |||||||||
| RTECS | NJ4375000 | |||||||||
| HazardClass | 6.1 | |||||||||
| PackingGroup | III | |||||||||
| HS Code | 29339900 | |||||||||
| Storage Class | 11 - Combustible Solids | |||||||||
| Hazardous Substances Data | 550-99-2(Hazardous Substances Data) | |||||||||
| Toxicity | LD50 s.c. in rats: 385 mg/kg (Gylfe) | |||||||||
| NFPA 704 |
|
Naphazoline hydrochloride price More Price(69)
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| Sigma-Aldrich | N5504 | Naphazoline hydrochloride | 550-99-2 | 25g | $79.7 | 2026-04-30 | Buy |
| Sigma-Aldrich | N0080000 | Naphazoline hydrochloride European Pharmacopoeia (EP) Reference Standard | 550-99-2 | 60 mg | $175 | 2026-04-30 | Buy |
| Sigma-Aldrich | 1457006 | Naphazoline hydrochloride United States Pharmacopeia (USP) Reference Standard | 550-99-2 | 200mg | $416 | 2026-04-30 | Buy |
| Sigma-Aldrich | N0080000 | Naphazoline hydrochloride European Pharmacopoeia (EP) Reference Standard | 550-99-2 | 50 mg | $164 | 2025-07-31 | Buy |
| TCI Chemical | N0542 | Naphazoline Hydrochloride >99.0%(T) | 550-99-2 | 10g | $32 | 2026-04-30 | Buy |
Naphazoline hydrochloride Chemical Properties,Uses,Production
Pharmacological effects
Naphazoline hydrochloride, is commonly used as a vasoconstrictor in the hospital's otorhinolaryngology and ophthalmology ,it is a adrenomimetic drug ,it has a strong effect on contraction of blood vessels and blood pressure elevation,it has inhibition effect on the central nervous system,by contraction of local vascular, it can play an anti-inflammatory and analgesic role in the local inflammatory lesions , and can eliminate congestion due to fatigue or other reasons. Clinically it is used for the treatment of colds, acute and chronic rhinitis, allergic conjunctivitis, allergic and inflammatory nasal congestion embolism. Local long-term use can lead to blood flow reduction in medication area, which causes resistance decreasing , and results in superinfection. It can not be taken orally. Dropping excess liquid or high concentrations can cause poisoning. Care should be taken, especially in children. Infants, hypertension, hyperthyroidism patients should take with caution, atrophic rhinitis patients are banned. The interval time of dropping , is preferably not less than 4 to 6 hours.
The above information is edited by the chemicalbook of Tian Ye.
Chemical Properties
White crystalline powder. Melting point 255-260 ℃. 40 grams of the product can be dissolved in 100 ml of water . It is soluble in alcohol, slightly soluble in chloroform, insoluble in ether and benzene. Odorless, bitter taste.
Uses
This product is a vasoconstrictor. Rat subcutaneous injection is LD50 385 mg/kg.
Production method
By the α-naphthalene acetic acid and ethylene diamine condensation, cyclization ,2-(1-naphthylmethyl) imidazoline (C14H14N2, [835-31-4]) is made , then after salifying, naphazoline hydrochloride is derived . The α-acetic acid and ethylene diamine are added to the reaction pot, stir and heat to 120 ℃, react after 1 hour, then heat to 130 ℃, react for 1 hour. Ethylenediamine and water are distilled ,and after vacuum distillation, collect 180-240 ℃ (1.33-4 kPa) distillate, obtain 2-(1-naphthylmethyl) imidazoline. It is dissolved in a mixture of acetone and ethanol, and at 10-12℃ inlet hydrogen chloride gas to become into a salt, naphazoline hydrochloride crystals is generated .
Chemical Properties
White or almost white, crystalline powder.
Originator
Albalon,Allergan,Australia
Uses
Naphazoline Hydrochloride is a useful synthetic intermediate used in eye drops. A vasoconstrictor.
Uses
adrenergic blocker
Uses
antihistamine
Definition
ChEBI: Naphazoline is an organic molecular entity.
Manufacturing Process
2.7 parts of naphtyl-(1)-acetiminoethylether (produced from naphthyl-1- acetonitrile) were dissolved in 12 parts of absolute alcohol. 1 part of ethylenediamine is then added and the mixture was heated to gentle boiling while passing it through nitrogen and simultaneously stirring until ammonia escaped no longer. The alcohol was is then distilled and the residue mixed with 40 parts of benzene and 1.8 parts of caustic potash. Stirring was continued for some time whereby the imidazoline base was dissolved in benzene. The benzene residue, is recrystallized several times from toluene. The 2-[naphthyl-1-methyl]-imidazoline represented the coloriless crystalls of melting point 252°-253°C. Its hydrochloride is easily soluble in water.
brand name
Albalon (Allergan); Nafazair (Bausch & Lomb); Nafazair (Pharmafair); Naphcon (Alcon); Opcon (Bausch & Lomb); Vasocon (Novartis).
Therapeutic Function
Vasoconstrictor, Nasal decongestant
Biological Activity
α-adrenoceptor agonist; imidazoline receptor agonist; vasoconstrictor.
Naphazoline hydrochloride Preparation Products And Raw materials
Raw materials
Preparation Products
| Supplier | Tel | Country | ProdList | Advantage | |
|---|---|---|---|---|---|
| Hebei Yanxi Chemical Co., Ltd. | +86-17531190177 | faithe@yan-xi.com | China | 5853 | 58 |
| Hebei Chuanghai Biotechnology Co., Ltd | +86-17732866630 | mina@chuanghaibio.com | China | 18126 | 58 |
| Henan Bao Enluo International TradeCo.，LTD | +86-17331933971 | deasea125996@gmail.com | China | 2472 | 58 |
| Anhui Ruihan Technology Co., Ltd | +undefined17756083858 | daisy@anhuiruihan.com | China | 973 | 58 |
| Henan Fengda Chemical Co., Ltd | +86-371-86557731 +86-13613820652 | info@fdachem.com | China | 20120 | 58 |
| Shaanxi Xianhe Biotech Co., Ltd | +86-17709210191; +86-17709210191 | Jerry@xhobio.com | China | 906 | 58 |
| Chongqing Soarwin Technology Co., Ltd | +86-15790943001 | crystal@sorawin.cn | China | 421 | 58 |
| Shanghai Daken Advanced Materials Co.,Ltd | +86-2158073036 | info@dakenam.com | China | 14026 | 58 |
| Nanjing Gold Pharmaceutical Technology Co. Ltd. | 025-84209270 15906146951 | CHINA | 115 | 55 | |
| Henan Tianfu Chemical Co.,Ltd. | +86-0371-55170693 +86-19937530512 | info@tianfuchem.com | China | 21585 | 55 |
Related articles
- Indications and side effects of Naphazoline hydrochloride eye drops
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- May 29，2024
View Lastest Price from Naphazoline hydrochloride manufacturers
| Image | Update time | Product | Price | Min. Order | Purity | Supply Ability | Manufacturer | |
|---|---|---|---|---|---|---|---|---|
 |
2026-07-30 | Naphazoline hydrochloride
550-99-2
|
$1.00 | 1KG | 99.00%-101.00%,USP/BP | 1ton/month | WUHAN FORTUNA CHEMICAL CO., LTD | |
 |
2026-07-23 | Naphazoline hydrochloride
550-99-2
|
1kg | 0.99 | 1000kg | Shaanxi Xianhe Biotech Co., Ltd | ||
 |
2026-07-09 | Naphazoline hydrochloride
550-99-2
|
$1.00-200.00 | 1KG | 99%, 99.5% Sublimated | Henan Fengda Chemical Co., Ltd |
-
- Naphazoline hydrochloride
550-99-2
- $1.00
- 99.00%-101.00%,USP/BP
- WUHAN FORTUNA CHEMICAL CO., LTD
-
- Naphazoline hydrochloride
550-99-2
- $0.00
- 0.99
- Shaanxi Xianhe Biotech Co., Ltd
-
- Naphazoline hydrochloride
550-99-2
- $1.00-200.00
- 99%, 99.5% Sublimated
- Henan Fengda Chemical Co., Ltd
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