Description

C.I. Acid Yellow 236 is a synthetic organic dye belonging to the acid dye class, identified by the CAS registry number 77907-21-2. This high-performance colorant is valued for its bright, vivid yellow hue and strong affinity for protein-based and polyamide fibers. It is primarily utilized in the textile industry for dyeing wool, silk, and nylon, as well as in the coloration of leather, paper, and inks, offering excellent wash and light fastness properties.

Application

• Primary dyeing of wool, silk, and nylon textiles.
• Coloration of leather goods and accessories.
• Manufacturing of colored paper and specialty papers.
• Formulation of inks for writing, printing, and marking.
• Dyeing of anodized aluminum for decorative purposes.
• Staining agent for biological and histological applications in laboratories.
• Production of colored soaps and detergents.
• Tinting of plastics and polymers where acid dye compatibility exists.

Basic Information

Product Name	C.I. Acid Yellow 236
CAS No.	77907-21-2
Molecular Formula	C16H12N4Na2O7S2
Molecular Weight	478.40 g/mol
Synonyms	Acid Yellow 236; C.I. 18970; Acid Leather Yellow G; Nylosan Yellow E-2G; Telon Yellow G; Acid Fast Yellow E-2G; Supranol Yellow GW; Acidol Yellow M-2GL
EINECS	Contact for details

Quality Control

Our C.I. Acid Yellow 236 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 comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and performance characteristics is provided with every shipment to guarantee compliance with your application requirements.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after use to prevent absorption of atmospheric moisture, which can affect product performance.

Specification

Item	Specification
Appearance	Yellow to orange-yellow powder
Identification (IR)	Conforms to standard
Color Strength	100 ± 3% (vs. Standard)
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Water Solubility	Conforms
Ash Content	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm

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