Description

Acid Yellow 42 is a synthetic organic dye belonging to the azo dye class, identified by CAS NO 6375-55-9. It is valued for its bright, vivid yellow hue and good fastness properties, making it a reliable colorant for demanding industrial applications. This product is primarily used by manufacturers in the textile, leather, and paper industries seeking consistent and high-quality dyeing results.

Application

• Textile Dyeing: Used for dyeing natural fibers like wool, silk, and nylon, providing a bright yellow color.
• Leather Coloring: Applied in the dyeing of leather goods, including footwear, apparel, and accessories.
• Paper Staining: Employed to color paper products, including specialty papers and packaging materials.
• Ink Formulation: Serves as a colorant component in the manufacture of inks for various printing applications.
• Biological Staining: Utilized in specific histological and microbiological staining procedures in laboratory settings.
• Plastics and Polymers: Can be incorporated as a colorant for certain types of plastics and synthetic materials.

Basic Information

Product Name	Acid Yellow 42
CAS No.	6375-55-9
Molecular Formula	C16H12N4Na2O7S2
Molecular Weight	494.40 g/mol
Synonyms	Acid Yellow G; C.I. Acid Yellow 42; Food Yellow 2; FD&C Yellow No. 6; Sunset Yellow FCF; E110; Lissamine Yellow 2G; Wool Yellow G; Hexacol Sunset Yellow FCF; 6-Hydroxy-5-[(4-sulfophenyl)azo]-2-naphthalenesulfonic acid disodium salt
EINECS	228-885-6

Quality Control

Our Acid Yellow 42 is produced under a strict quality management system. Every batch is tested to ensure it meets precise color strength, purity, and solubility specifications. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing key parameters such as assay, heavy metal content, and identification. Our quality protocols are designed to support compliance with relevant industry standards for its intended applications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents. The product is light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Orange-yellow powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 85.0%
Color Strength	100 ± 3%
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 0.2%
Heavy Metals (as Pb)	≤ 20 ppm
Arsenic (As)	≤ 3 ppm
Subsidiary Dyes	≤ 3.0%
Solubility (in Water)	Clear, yellow solution

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.