Description

C.I. Acid Yellow 136 is a synthetic monoazo acid dye, identified by CAS No. 61724-52-5, valued for its bright, vivid yellow hue and good fastness properties. It is a critical component for imparting durable and wash-resistant coloration to protein-based and polyamide fibers. This dye is essential for manufacturers in the textile, leather, and paper industries seeking consistent, high-quality yellow shades for their products.

Application

• Textile Dyeing: Primary application for dyeing natural protein fibers like wool and silk, as well as synthetic polyamide fibers such as nylon, offering good leveling and exhaustion properties.
• Leather Coloring: Used in the dyeing of leather goods, providing rich and uniform yellow colors with good adhesion to the protein matrix of leather.
• Paper Staining: Employed for coloring specialty papers, including decorative and packaging papers, where a bright yellow shade is required.
• Ink Formulation: A colorant for certain types of inks, particularly where acid dye compatibility is needed for specific substrates.
• Biological Staining: Potential use as a microscopic stain in histology and cytology for contrast and identification under specific protocols.

Basic Information

Product Name	C.I. Acid Yellow 136
CAS No.	61724-52-5
Molecular Formula	C16H12N4Na2O7S2
Molecular Weight	506.40 g/mol
Synonyms	Acid Yellow 136; Acid Leather Yellow GRL; C.I. 24895; Acid Fast Yellow GRL; Nylosan Yellow E-GRL; Telon Yellow GRL; Supranol Yellow GRL; Acid Yellow GRL
EINECS	Contact for details

Quality Control

Our C.I. Acid Yellow 136 is manufactured under a stringent quality management system to ensure batch-to-batch consistency and performance. Each lot is tested against rigorous internal specifications for color strength, shade, solubility, and impurity profiles. A Certificate of Analysis (COA) detailing purity, physical properties, and conformance is provided with every shipment to guarantee it meets the demands of industrial dyeing processes.

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 incompatible materials. Due to its light-sensitive nature (store away from light), prolonged exposure to direct light should be avoided to maintain product integrity.

Specification

Item	Specification
Appearance	Yellow to orange-yellow powder
Identification (IR)	Conforms to standard
Color Strength	100 ± 3% (vs. Standard)
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 0.5%
Shade	Conforms to standard
Solubility	Freely soluble in water

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