Description

Acid Yellow 242 is a high-performance synthetic organic dye belonging to the azo chemical class, specifically engineered for demanding coloration applications. Its primary value lies in providing excellent light and wash fastness properties, ensuring color integrity in challenging environments. This dye is essential for manufacturers in the textile and leather industries seeking vibrant, durable yellow shades for nylon, wool, and silk fibers.

Application

• Primary dyeing of nylon fibers for apparel, sportswear, and automotive textiles.
• Coloration of wool and silk fabrics, prized for its level dyeing and good migration properties.
• Leather dyeing for footwear, upholstery, and fashion accessories.
• Ink formulation for specialty printing applications requiring specific color fastness.
• As a colorant for paper and other specialty substrates where acid dyes are applicable.

Basic Information

Product Name	Acid Yellow 242
CAS No.	157629-95-3
Molecular Formula	C21H18N4Na2O8S2
Molecular Weight	580.50 g/mol
Synonyms	Acid Fast Yellow A; C.I. Acid Yellow 242; Acid Yellow 242 (C.I. 18695); 2,7-Naphthalenedisulfonic acid, 5-[[4-[(2,5-dihydroxyphenyl)azo]phenyl]azo]-4-hydroxy-3-[(4-nitrophenyl)azo]-, disodium salt; Acid Leather Yellow RL; Nylosan Yellow E-RL; Telon Yellow RL
EINECS	Contact for details

Quality Control

Our Acid Yellow 242 is manufactured under a strict quality management system to ensure batch-to-batch consistency and performance reliability. Each lot is tested against key parameters including color strength, shade, solubility, and fastness properties. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and performance metrics is provided with every shipment to support your quality assurance protocols.

Storage

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

Specification

Item	Specification
Appearance	Yellow to orange powder
Identification (IR)	Conforms to standard
Color Strength	100 ± 3% (vs. Standard)
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 0.5%
pH (1% Solution)	6.0 - 8.0
Shade	Within agreed tolerance
Fastness Properties (Typical)	Light: 5-6; Wash: 4-5

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