6537-66-2

Basic information

• Product Name: DIRECT YELLOW 29
• Synonyms: Solius Light Yellow RT;Triamin Yellow RT.;2',2'''-[Azobis(4,1-phenylene)]bis(6-methyl-2,6'-bibenzothiazole-7-sulfonic acid sodium) salt;Sirius Supra Yellow RT;2,6'-Dibenzothiazole-7-sulfonic acid, 2',2'''-(azodi-4,1-phenylene)bis(6-methyl-, disodium salt;Amanil fast yellow bx;Atlantic fast yellow ffx;Benzanil supra yellow gx
• CAS NO: 6537-66-2
• Molecular Formula: C42H24N6Na2O6S6
• Molecular Weight: 947.05
• EINECS: 229-448-7
• Mol File: 6537-66-2.mol
• Article Data: 0

Chemical Properties

• Appearance: /
• Density: 1.66g/cm3
• Refractive Index: 1.847
• CAS DataBase Reference: DIRECT YELLOW 29(CAS DataBase Reference)
• NIST Chemistry Reference: DIRECT YELLOW 29(6537-66-2)
• EPA Substance Registry System: DIRECT YELLOW 29(6537-66-2)

Safety Data

• Hazardous Substances Data: 6537-66-2(Hazardous Substances Data)

Usage

Description

DIRECT YELLOW 29 is a red light yellow dye with properties of palm red powder. It is soluble in water, resulting in a golden brown color with a solubility of 30 g/L at 60°C and 48 g/L at 98°C. In ethanol, it appears as a light lemon yellow color. When treated with strong sulfuric acid, it turns orange red brown, and when diluted, it becomes gold. The dye solution turns orange red brown with strong hydrochloric acid, and when thick sodium hydroxide solution is added, it turns golden brown. The presence of copper and iron ions in the dyeing process causes a slight color change. DIRECT YELLOW 29 has good resistance to chlorine stability and is resistant to reduction on Rongalite and sodium sulfide. It is characterized by its acid resistance, alkali resistance, light fastness, soaping, water fading, and stain fading properties.

Uses

Used in Textile Industry:
DIRECT YELLOW 29 is used as a dye for cotton and viscose fibers, allowing for direct printing and whitening. It is also used in combination with dispersal dyes in a high-temperature bath for dyeing polyester/cotton blended fabrics.
Used in Leather Industry:
DIRECT YELLOW 29 is used for leather shading, providing a consistent and vibrant color to the leather products.
Used in Paper Industry:
DIRECT YELLOW 29 is utilized for paper shading, enhancing the appearance and quality of the final paper product.

Preparation

use sodium hypochlorite processing C.I. Direct Yellow 59 (C.I. 49000) solution.

Standard

Acid Resistance

Fading

Stain

AATCC

5

InChI:InChI=1/C42H26N6O6S6/c1-21-3-15-31-35(37(21)59(49,50)51)57-41(45-31)25-9-17-29-33(19-25)55-39(43-29)23-5-11-27(12-6-23)47-48-28-13-7-24(8-14-28)40-44-30-18-10-26(20-34(30)56-40)42-46-32-16-4-22(2)38(36(32)58-42)60(52,53)54/h3-20H,1-2H3,(H,49,50,51)(H,52,53,54)/b48-47+