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CAS

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2653-64-7

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.

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  • 2653-64-7 Structure

  • Basic information

    1. Product Name: 1-(1-naphthylazo)-2-naphthol
    2. Synonyms: 1-(1-naphthylazo)-2-naphthol;Red 2R;2-Naphthalenol, 1-(1-naphthalenylazo)-;Solvent red 4 (C.I. 12170);C.I. Solvent Red 4;C. I. Pigment Red 40;1-(1-Naphtylazo)-2-naphthol;1-(1-Naphtylazo)naphthalene-2-ol
    3. CAS NO:2653-64-7
    4. Molecular Formula: C20H14N2O
    5. Molecular Weight: 298.33796
    6. EINECS: 220-176-4
    7. Product Categories: Organics
    8. Mol File: 2653-64-7.mol

  • Chemical Properties

    1. Melting Point: N/A
    2. Boiling Point: 500.6°Cat760mmHg
    3. Flash Point: 256.5°C
    4. Appearance: /
    5. Density: 1.2g/cm3
    6. Vapor Pressure: 3.76E-10mmHg at 25°C
    7. Refractive Index: 1.662
    8. Storage Temp.: N/A
    9. Solubility: N/A
    10. CAS DataBase Reference: 1-(1-naphthylazo)-2-naphthol(CAS DataBase Reference)
    11. NIST Chemistry Reference: 1-(1-naphthylazo)-2-naphthol(2653-64-7)
    12. EPA Substance Registry System: 1-(1-naphthylazo)-2-naphthol(2653-64-7)

  • Safety Data

    1. Hazard Codes: N/A
    2. Statements: N/A
    3. Safety Statements: N/A
    4. WGK Germany:
    5. RTECS:
    6. HazardClass: N/A
    7. PackingGroup: N/A
    8. Hazardous Substances Data: 2653-64-7(Hazardous Substances Data)

2653-64-7 Usage

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+

2653-64-7SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 11, 2017

Revision Date: Aug 11, 2017

1.Identification

1.1 GHS Product identifier

Product name (1Z)-1-(naphthalen-1-ylhydrazinylidene)naphthalen-2-one

1.2 Other means of identification

Product number -
Other names Pigment Bordeaux

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:2653-64-7 SDS

2653-64-7Downstream Products

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.

ACID-BASE CHARACTERISTICS OF NAPHTHALENEDIAZONIUM SALTS

Bagal, I. L.,Snegireva, L. V.,El'tsov, A. V.

, p. 1507 - 1516 (2007/10/02)

On the basis of spectral and synthetic methods it was demonstrated that the acid-base equilibrium in naphthalenediazonium salts and their disulfo derivatives in an aqueous medium is complicated by the formation of hydroxyazo dyes.The thermodynamic acidity

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