6407-85-8

Basic information

• Product Name: sodium 6-(1-naphthylazo)naphthalene-2-sulphonate
• Synonyms: sodium 6-(1-naphthylazo)naphthalene-2-sulphonate;6-(1-Naphtylazo)-2-naphthalenesulfonic acid sodium salt;6-[(1-Naphtyl)azo]-2-naphthalenesulfonic acid sodium salt;Azo Acid Brown;C.I.13000;C.I.Acid Brown 8
• CAS NO: 6407-85-8
• Molecular Formula: C20H13N2NaO3S
• Molecular Weight: 384.38359
• EINECS: 229-046-1
• Mol File: 6407-85-8.mol
• Article Data: 0

Chemical Properties

• Boiling Point: 689.6°C at 760 mmHg
• Flash Point: 370.9°C
• Appearance: /
• Density: 1.25g/cm³
• Vapor Pressure: 7.21E-19mmHg at 25°C
• Refractive Index: 1.629
• CAS DataBase Reference: sodium 6-(1-naphthylazo)naphthalene-2-sulphonate(CAS DataBase Reference)
• NIST Chemistry Reference: sodium 6-(1-naphthylazo)naphthalene-2-sulphonate(6407-85-8)
• EPA Substance Registry System: sodium 6-(1-naphthylazo)naphthalene-2-sulphonate(6407-85-8)

Safety Data

• Hazardous Substances Data: 6407-85-8(Hazardous Substances Data)

Usage

Description

Sodium 6-(1-naphthylazo)naphthalene-2-sulphonate is an organic compound that is characterized by its brown color in solid form. Its water solution appears yellow-brown, but it is not particularly soluble in water. However, it is easily soluble in ethanol, where it exhibits a yellow-light brown color. When exposed to strong sulfuric acid in the dark, the compound turns purple and then red upon dilution. In an aqueous solution, the addition of strong hydrochloric acid results in a yellow-olive brown color, while the addition of concentrated hydrogen peroxide leads to an orange-brown, oxidized solution.

Uses

Used in Dye Industry:
Sodium 6-(1-naphthylazo)naphthalene-2-sulphonate is used as a dye for various applications due to its color-changing properties when exposed to different chemicals and conditions. Its ability to produce a range of colors makes it a versatile choice for the dye industry.
Used in Textile Industry:
In the textile industry, sodium 6-(1-naphthylazo)naphthalene-2-sulphonate is used as a colorfastness agent. It helps to improve the light fastness (ISO 4-5), soaping fastness (ISO 3), perspiration fastness (ISO 2), oxygen bleaching fastness (ISO 3), and fastness to seawater (ISO 1) of fabrics, ensuring that the colors remain vibrant and resistant to various environmental factors.
Used in Analytical Chemistry:
Sodium 6-(1-naphthylazo)naphthalene-2-sulphonate can also be used in analytical chemistry as a reagent for the detection and quantification of certain metal ions, such as copper and iron, due to its color-changing properties upon interaction with these ions.
Used in Research and Development:
sodium 6-(1-naphthylazo)naphthalene-2-sulphonate's unique properties make it a valuable tool in research and development, particularly in the fields of chemistry and materials science. It can be used to study the effects of various chemicals and conditions on its structure and properties, leading to the development of new materials and applications.

Preparation

6-Aminonaphthalene-2-sulfonic acid diazo, and Naphthalen-1-amine coupling, and then diazo, and with ethanol and sodium carbonate common heating, away with amino.

Standard

Light Fastness

Fading

Stain

ISO

4-5

InChI:InChI=1/C31H28N2O5S/c1-4-37-30(35)27-20(2)32-31-33(28(27)23-11-8-12-25(18-23)36-3)29(34)26(39-31)17-21-13-15-24(16-14-21)38-19-22-9-6-5-7-10-22/h5-18,28H,4,19H2,1-3H3