1-Nitroso-2-naphthol/α-Nitroso-β-nophthol

English Name: 1-nitroso-2-naphthol; α- Nitroso- β- nophthol

Other names: α- Nitroso- β- Naphthol; Cobalt reagent; 1-nitrosonaphthol; 1,2-naphthoquinone-1-oxime

CAS No.: 131-91-9

C10H7NO2=173.17

Grade: br

Purity: ≥ 97.0% (neutralization titration)

Moisture: ≤ 0.5%

Burning residue: ≤ 0.05%

Grade: ind

Melting point: 104 ～ 108 ℃

Sensitivity test: acceptable

 Physicochemical properties: brownish yellow needle crystal or powder. Easy to sublimate. Slightly soluble in water, soluble in ethanol, benzene, ether, carbon disulfide, caustic solution, carbon trichloride, carbon tetrachloride and other organic solvents, slightly soluble in cold petroleum ether. The solution is yellowish or brownish orange, and forms red or blue water-soluble complexes with CO3 +, Ru3 +, ZrO2 +, Fe2 +, etc., which can be extracted by chloroform and carbon tetrachloride

Purpose: biochemical research. It is used as a chromogenic agent for spectrophotometric determination of cobalt, palladium and zirconium. It is used as a coprecipitation agent for enriching Cr3 +, CO2 +, Fe2 +, uo, and also as an extractant for Ag +, Cd2 +, CO2 +, Cu2 +, Ni2 +, and th4 + plasma. It is used as a precipitant for measuring cobalt by weighing method. It is also used as an intermediate in organic synthesis

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