1-(2-Pyridylazo)-2-naphthol
Also known as: PAN INDICATOR
Orange red amorphous powder. Melting point 141 ℃, soluble in methanol, ethanol, benzene, ether, chloroform and hot dilute alkali solution, insoluble in water. The solution is pink above pH12, orange red in weak acid and purple in concentrated sulfuric acid. Its metal complex is pink or red.
| Payment & Shipping Terms | Supply Capacity | ||
|---|---|---|---|
| Payment Terms: | T/T, WU | Production Capacity: | 100T/year |
| Min. Order: | 25KG | Packing: | according to the customer's requirements |
| Means of Transport: | Ocean, Air, Land | Delivery Date: | 7 days |
1-(2-Pyridylazo)-2-naphthol CAS 85-85-8
Orange red amorphous powder. Melting point 141 ℃, soluble in methanol, ethanol, benzene, ether, chloroform and hot dilute alkali solution, insoluble in water. The solution is pink above pH12, orange red in weak acid and purple in concentrated sulfuric acid. Its metal complex is pink or red.
Related properties
Orange red amorphous powder,Soluble in methanol, ethanol, benzene, ether, chloroform and hot alkali liquor, insoluble in water.when the pH of solution more than 12,it is pink.In the weak acid orange red,Purple in sulfuric acid,The metal complex are pink or red.
Application
Metal indicator and the spectral analysis of transition metal reagents. Embodied in: used for photometric method and extraction spectrophotometry and fluorescence spectrophotometry Al3 +, Sb3 + and Cd2 +, Zn2 +, Co2 +, Cu2 + and Ga3 +, In3 +, Fe3 +, Pd 2 + metal ions such as chromogenic agent. And used for determination of EDTA coordination titration Bi3 + and Ga3 +, In3 + and Ni2 +, Cu2 +, Ce3 +, such as metal indicator, also used for trace metal precipitant, used to capture titanium, vanadium, manganese, iron, cobalt, nickel, copper, zinc and lead, etc trace trace metals.
1.Complexon indicator
2.Metal indicator and the spectral analysis of transition metal reagents.Specific performance:Used for photometric method and extraction spectrophotometry and fluorescence spectrophotometry Al3+, Sb3+ and Cd2+, Zn2+, Co2+, Cu2+and Ga3+, In3+, Fe3+, Pb2+ metal ions such as chromogenic agent.Also used for trace metal precipitant.Is used to capture titanium, vanadium, manganese, iron, cobalt, nickel, copper, zinc and lead, etc trace trace metals.
Methods of production:
By 2 - aminopyridine after diazotization, and 2 - naphthol coupling. Anhydrous ethanol will react with sodium metal to produce ethanol, sodium 2 - aminopyridine ethanol solution, then add the ventilation with ethyl nitrite steam for 45 to 50 ℃. 8 hours to finish, thermal insulation, filter the diazonium salt washing with ether . Add the diazonium salt in the ethanol solution of 2 - naphthol, on the carbon dioxide for 45 to 50 ℃ access coupling reaction, filter out crystallization after 6 hours, reoccupy after washing with distilled water ethanol recrystallization, drying is the finished product.
Hazard statements
Dangerous code: Xi
The level of danger: R36/37/38
Security level: S26-36
Mosinter, a professional Indicator Chemicals manufacturer in China , produces high quality 1-(2-Pyridylazo)-2-naphthol CAS 85-85-8. We can customize according to customer's requirement. If you have any question pls mail us or call us.
| CAS Number | 85-85-8 |
|---|---|
| Molecular Formula | C15H11N3O |
| Molecular Weight | 249.27 |
| Place of Origin | Zhejiang,China (Mainland) |
| Melting point | 138-141 °C |
Send an inquiry for 1-(2-Pyridylazo)-2-naphthol
Related products
1,10-Phenanthroline Hydrate
O-phenanthroline (o-phenanthroline) is a commonly used redox indicator. As a simple, cheap and fast detection method, o-phenanthroline colorimetry is widely used in the detection and analysis of iron. The principle is that in the solution of pH = 3 ~ 9, o-phenanthrene and Fe2 + will form a stable orange red complex. The color depth of the complex can be used to determine the content of iron ions in the sample to be tested.
5,5′-Dithiobis(2-nitrobenzoic Acid)
Widely used in biochemical research, it is a sensitive reagent for the determination of thiol group in protein, polypeptide and tissue. Monitoring of organophosphorus pesticide poisoning (determination of cholinesterase).
8-Hydroxyquinoline
8-hydroxyquinoline is a white or light yellow crystalline or crystalline powder. It is a white or light yellow crystalline or crystalline powder, insoluble in water and ether, soluble in ethanol, acetone, chloroform, benzene or dilute acid, and can be sublimated. Less corrosive. Low toxicity, ld504800mg / kg.
AZURE II EOSINATE
The main components are the mixture of methylene blue, azure I and eosin.
Acid Blue 93
It is a weak acid dye, soluble in water and alcohol. Methyl blue is widely used in animal and plant production technology. When combined with eosin, it can dye nerve cells, which is also an indispensable dye in bacterial production. Aqueous solution is the living dye of protozoa. Methyl blue is very easy to oxidize, so it can not be preserved for a long time after dyeing.
Acid Green 1
Biological staining, complexation indicator. Naphthol green B can be combined with acid chrome blue K to form a mixed indicator KB indicator, which makes its color change more acute, from purplish red to blue green.
Alizarin Red S
Orange yellow or yellow brown powder, soluble in water, slightly soluble in ethanol, insoluble in benzene and chloroform; pH of 1% aqueous solution is 2.15, and its aqueous solution is light yellow brown, yellow after adding hydrochloric acid, and blue purple after adding sodium hydroxide. As a dye coordination agent, it has been widely used in spectrophotometry. In recent years, many authors have applied the adsorptive catalytic wave of ARS and its metal complexes on the mercury electrode to the electroanalysis, which has improved the sensitivity and selectivity of the determination.
