Description

Acid Yellow 137 is a synthetic organic dye belonging to the azo chemical class, valued for its bright, stable yellow hue. This high-performance colorant is engineered to deliver excellent light and wash fastness properties, making it a critical component for achieving durable coloration. It is primarily used by manufacturers in the textile, leather, and specialty paper industries seeking reliable and vibrant yellow shades for their products.

Application

• Primary dyeing and printing of polyamide (nylon) fibers and fabrics.
• Coloration of wool and silk textiles.
• Dyeing of leather goods, including apparel, upholstery, and accessories.
• Manufacturing of colored paper and specialty paper products.
• Ink formulation for specific writing instruments and stamp pads.
• As a colorant in the production of certain cosmetic products (subject to regional regulatory approval).

Basic Information

Product Name	Acid Yellow 137
CAS No.	72827-84-0
Molecular Formula	C16H13N4NaO4S
Molecular Weight	380.35 g/mol
Synonyms	Acid Yellow 137; C.I. 22910; 2,7-Naphthalenedisulfonic acid, 5-[(4-aminophenyl)azo]-4-hydroxy-3-[(2-methylphenyl)azo]-, sodium salt; Acid Leather Yellow G; Nylosan Yellow E-2G; Telon Yellow G; Supranol Yellow GG; Acid Fast Yellow E-2G
EINECS	Contact for details

Quality Control

Our Acid Yellow 137 is manufactured under a strict quality management system. Every batch is tested to ensure consistent strength, shade, and chemical purity. Key parameters such as color strength, solubility, and fastness properties are verified against our rigorous internal specifications. A comprehensive Certificate of Analysis (COA) detailing these results is provided with each shipment to guarantee product integrity and performance.

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 and sources of heat. The product is light-sensitive and should be stored away from direct light exposure to maintain stability.

Specification

Item	Specification
Appearance	Yellow to orange-yellow powder
Identification (IR)	Conforms to standard
Assay (HPLC)	Min. 95%
Moisture Content	Max. 5.0%
Water Solubility	Conforms
Shade	Conforms to standard pattern
Fastness Properties (Light, Wash)	Grade 4-5 (Typical)

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