Description

C.I. Azoic Yellow 28 is a synthetic organic pigment belonging to the azoic coupling component class, identified by CAS NO 12221-26-0. It is valued for its bright, clean yellow hue and excellent fastness properties, particularly to light and washing. This pigment is primarily used in the textile industry for the coloration of cellulosic fibers like cotton and viscose, where it forms an insoluble colorant within the fiber matrix.

Application

• Textile Dyeing and Printing: Primary application for dyeing and printing cotton, viscose, and other cellulosic fibers to achieve vibrant, wash-fast yellow shades.
• Ink Formulations: Used in the manufacture of specialty inks, including textile printing inks, where color stability is required.
• Pigment Preparations: Can be processed into pigment preparations or dispersions for use in paints, coatings, and plastics, though less common than in textiles.
• Leather Coloring: Employed in the dyeing of leather goods to provide durable yellow coloration.
• Paper Staining: Suitable for the surface coloring or mass coloration of specialty papers.

Basic Information

Product Name	C.I. Azoic Yellow 28
CAS No.	12221-26-0
Molecular Formula	C17H13ClN4O4
Molecular Weight	372.76 g/mol
Synonyms	Pigment Yellow 28; Azoic Yellow 4G; Azoic Yellow GC; C.I. 18830; 2,5-Dichloro-4-[[5-hydroxy-3-methyl-1-(4-sulfophenyl)-1H-pyrazol-4-yl]azo]benzenesulfonic acid; Fast Yellow GC Base; Naphthol AS-G Base
EINECS	Contact for details

Quality Control

Our C.I. Azoic Yellow 28 is manufactured under a strict quality management system. Each batch is tested to ensure consistent shade, strength, and chemical composition. Key parameters such as purity, insolubility, and fastness properties are verified. A Certificate of Analysis (COA) detailing these specifications is provided with every shipment to guarantee it meets the requirements for industrial textile applications.

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 strong oxidizing agents. The product is light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Yellow to orange-yellow powder
Identification (IR)	Conforms to standard
Shade	Conforms to standard
Strength	100 ± 5%
Moisture Content	≤ 5.0%
Water-soluble Matter	≤ 1.0%
Particle Size (Residue on 80 mesh)	≤ 5.0%
Fastness to Light	≥ 5-6 (Standard scale)
Fastness to Washing	≥ 4-5 (Standard scale)

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