Description

Acid Yellow 10 is a synthetic, water-soluble acid dye belonging to the azo dye class, identified by CAS NO 21542-82-5. It is valued for its bright, vivid yellow hue and excellent affinity for protein-based fibers like wool, silk, and nylon, as well as its use in coloring other materials. This dye is essential for manufacturers in the textile, leather, paper, and specialty ink industries seeking consistent, high-color-strength pigments for their products.

Application

• Textile Dyeing: Primary application for dyeing wool, silk, and nylon fibers, providing good light and wash fastness.
• Leather Coloring: Used in the dyeing of leather goods to achieve vibrant and uniform yellow shades.
• Paper Staining: Employed in the production of colored papers, including decorative and specialty papers.
• Ink Formulation: A key component in the manufacture of inks for ballpoint pens, stamp pads, and other writing instruments.
• Biological Staining: Utilized in microscopy and histology as a staining agent for biological tissues.
• Food Contact Material Coloring: May be used for coloring packaging materials where direct food contact is not intended.

Basic Information

Product Name	Acid Yellow 10
CAS No.	21542-82-5
Molecular Formula	C16H13N4NaO4S
Molecular Weight	380.35 g/mol
Synonyms	Acid Yellow 10; C.I. 47005; Quinoline Yellow WS; Food Yellow 13 (when of specific purity); D&C Yellow No. 10; 2-(2-Quinolyl)-1,3-indandione disulfonic acid disodium salt; Acid Leather Yellow PG; Acid Fast Yellow E
EINECS	244-440-1

Quality Control

Our Acid Yellow 10 is manufactured under a strict quality management system. Each batch is tested to ensure it meets precise specifications for color strength, hue, solubility, and impurity profiles. We provide comprehensive Certificates of Analysis (COA) with key parameters including assay, heavy metal content, and identification. Our quality commitment supports compliance with relevant industry standards for dyes and colorants.

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	Yellow to orange-yellow powder
Identification (IR)	Conforms to standard
Assay (HPLC)	Min. 85%
Color Strength	100 ± 5% (vs. Standard)
Moisture Content	Max. 5.0%
Water Solubility	Clear solution at 1%
Ash Content (Sulfated)	Max. 30%
Heavy Metals (as Pb)	Max. 20 ppm

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