Description

Acid Yellow 38 is a synthetic, water-soluble azo dye belonging to the acid dye class, widely recognized for its bright and vivid yellow hue. This dye is valued for its strong affinity to protein fibers like wool, silk, and nylon, providing excellent color fastness and level dyeing properties. It is an essential coloring agent for the textile industry and is also utilized in the coloration of leather, paper, and certain specialty inks. Acid Yellow 38 CAS NO 13390-47-1 is supplied as a high-purity powder to ensure consistent performance in demanding industrial applications.

Application

Acid Yellow 38 is primarily used as a coloring agent across several industries due to its vibrant shade and good fastness properties. Key application areas include:

• Textile Dyeing: For dyeing wool, silk, nylon, and other polyamide fibers.
• Leather Coloring: Used in the finishing and dyeing of leather goods.
• Paper Staining: Employed in the production of colored papers and paper products.
• Ink Formulation: A component in the manufacture of specialty inks, including stamp pad and inkjet inks.
• Biological Staining: Potential use as a microscopic stain in histology and cytology.
• Food Contact Materials: For coloring packaging materials where direct food contact is not intended.

Basic Information

Product Name	Acid Yellow 38
CAS No.	13390-47-1
Molecular Formula	C16H13N3Na2O7S2
Molecular Weight	477.40 g/mol
Synonyms	Acid Yellow 38; C.I. 25135; Lissamine Yellow 2G; Wool Yellow 2G; Acid Leather Yellow 2G; Acid Fast Yellow 2G; Acid Yellow 2G; 6-Hydroxy-5-[(4-sulfophenyl)azo]-2-naphthalenesulfonic acid disodium salt; Disodium 6-hydroxy-5-[(4-sulfonatophenyl)diazenyl]naphthalene-2-sulfonate
EINECS	236-560-1

Quality Control

Our Acid Yellow 38 is manufactured under a strict quality management system. Every batch is tested to ensure it meets high-purity standards and consistent color strength. Key parameters such as dye content, shade, solubility, and impurity profiles are verified. Certificates of Analysis (COA) detailing all test results are available upon request to support your quality assurance protocols.

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 and incompatible materials. The product is light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Yellow to orange-yellow powder
Identification (IR)	Conforms to standard
Assay (Dye Content)	Min. 95%
Moisture Content	Max. 5.0%
Water Solubility	Clear solution at 1%
Shade & Strength	Within agreed tolerance vs. standard
pH (1% Solution)	6.0 - 8.0
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.