Description

Acid Yellow 158 is a synthetic organic dye belonging to the azo chemical class, valued for its bright, stable yellow hue and excellent fastness properties. It is a critical component for achieving consistent, high-quality coloration in demanding industrial applications where durability is paramount. This dye is primarily sought by manufacturers in the textile, leather, and specialty paper industries for dyeing and printing natural and synthetic fibers.

Application

• Primary dyeing of nylon and wool fibers for apparel and carpets.
• Printing applications on silk and polyamide fabrics.
• Coloration of leather goods, including upholstery and accessories.
• Manufacture of colored paper and specialty packaging materials.
• As a colorant for inks used in various marking and printing processes.
• Potential use in the coloration of plastics and polymers, subject to compatibility testing.

Basic Information

Product Name	Acid Yellow 158
CAS No.	12220-84-7
Molecular Formula	C26H18N4Na2O8S2
Molecular Weight	624.55 g/mol
Synonyms	Acid Yellow 158; C.I. Acid Yellow 158; 2,7-Naphthalenedisulfonic acid, 5-[[4-[(2,5-dichlorophenyl)azo]phenyl]amino]-4-hydroxy-3-[(2-methylphenyl)azo]-, disodium salt; Acid Leather Yellow PG; Nylosan Yellow E-3G; Telon Yellow GRL; Supranol Yellow GRL; Acid Fast Yellow E-GL
EINECS	Contact for details

Quality Control

Our Acid Yellow 158 is manufactured under a stringent quality management system to ensure batch-to-batch consistency and performance. 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 guarantee it meets your specific application requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at ambient temperature (15-25°C). Keep away from strong oxidizing agents. For long-term storage, maintain low humidity conditions to prevent caking.

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
Fastness Properties	To be specified per grade

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