2653-64-7 Usage
Description
1-(1-naphthylazo)-2-naphthol is an organic compound with a yellow-red crystalline structure. It has a melting point of 224°C and is soluble in hot ethanol and benzene, displaying a red color. When dissolved in concentrated sulfuric acid, it forms a red light blue solution, which turns red light purple upon dilution and eventually precipitates as a red-brown solid. The dye ethanol solution of this compound turns dark red upon the addition of concentrated hydrochloric acid and bright red light brown when mixed with concentrated sodium hydroxide solution.
Uses
Used in Oil, Fat, and Wax Coloring:
1-(1-naphthylazo)-2-naphthol is used as a coloring agent in the oil, fat, and wax industries. Its ability to produce a red color in various solvents makes it a suitable choice for coloring these substances.
Used in Soap Coloring:
In the soap industry, 1-(1-naphthylazo)-2-naphthol is utilized as a coloring agent to impart a desired red hue to the soap products.
Standard:
The light fastness and heat resistance of 1-(1-naphthylazo)-2-naphthol are stable, with a melting point of 220°C. It is insoluble in water and shows no change when mixed with 5% sodium carbonate or 5% hydrochloric acid.
Preparation
Naphthalen-1-amine diazotization and Naphthalen-2-ol coupling.
Standard
Light Fastness
Melting point
Stable
ISO
General
Check Digit Verification of cas no
The CAS Registry Mumber 2653-64-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,6,5 and 3 respectively; the second part has 2 digits, 6 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 2653-64:
(6*2)+(5*6)+(4*5)+(3*3)+(2*6)+(1*4)=87
87 % 10 = 7
So 2653-64-7 is a valid CAS Registry Number.
InChI:InChI=1/C20H14N2O/c23-19-13-12-15-7-2-4-10-17(15)20(19)22-21-18-11-5-8-14-6-1-3-9-16(14)18/h1-13,21H/b22-20+
2653-64-7Relevant articles and documents
New dry arenediazonium salts, stabilized to an exceptionally high degree by the anion of o-benzenedisulfonimide
Barbero, Margherita,Crisma, Marco,Degani, Lacopo,Fochi, Rita,Perracino, Paolo
, p. 1171 - 1175 (2007/10/03)
Arenediazonium o-benzenedisulfonimides 3 (20 examples, yield >90%) were prepared in the dry state by diazotization of aromatic amines with (-pentyl nitrite and o-benzenedisulfonimide in glacial acetic acid or formic acid at 0-5°C. Unlike most diazonium salts in the dry state, salts 3 are very highly stable.
