Description

C.I. Acid Yellow 232 is a synthetic organic dye belonging to the acid dye class, identified by CAS NO 134687-50-6. This high-performance colorant is valued for its bright, vivid yellow hue and strong affinity for protein-based and polyamide fibers. It is essential for manufacturers in the textile and leather industries seeking consistent, wash-fast coloration. The product is also utilized in specialized applications requiring precise and stable yellow shades.

Application

• Primary dyeing and printing of nylon, wool, and silk textiles.
• Coloration of leather goods, including upholstery, apparel, and accessories.
• Manufacturing of paper and specialty paper products.
• Ink formulation for inks used in marking and specialty printing.
• As a colorant for certain types of plastics and synthetic materials.
• Research and development applications in analytical chemistry and as a staining agent.

Basic Information

Product Name	C.I. Acid Yellow 232
CAS No.	134687-50-6
Molecular Formula	C21H16N4Na2O8S2
Molecular Weight	582.48 g/mol
Synonyms	Acid Yellow 232; C.I. 18851; Acid Leather Yellow N-2R; Nylosan Yellow E-2R; Telon Yellow K-2G; Acid Fast Yellow E-2G; Acidol Yellow M-2GL; Supranol Yellow 4GL; Dermacid Yellow 232
EINECS	Contact for details

Quality Control

Our C.I. Acid Yellow 232 is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing to ensure it meets precise color strength, shade, and purity specifications. Key parameters such as solubility, fastness properties, and heavy metal content are verified. Certificates of Analysis (COA) documenting these 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 incompatible materials. Due to its light-sensitive nature, 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)
Shade	Conforms to standard
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 0.5%
Dye Content	≥ 90%
Fastness Properties	Contact for details

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