Description

C.I. Acid Red 228 is a synthetic, water-soluble azo dye belonging to the acid dye class, widely recognized for its vibrant red hue. This high-performance colorant is valued for its excellent tinctorial strength and good lightfastness, providing reliable and consistent coloration. It is primarily used for dyeing protein fibers like wool, silk, and nylon, as well as in the coloration of leather and paper products, meeting the demands of textile and material finishing industries.

Application

• Textile Dyeing: Primary application for dyeing wool, silk, and polyamide (nylon) fibers to achieve bright red shades.
• Leather Coloring: Used in the tanning industry for dyeing leather goods, providing good penetration and color uniformity.
• Paper Staining: Employed in the production of specialty papers, decorative papers, and packaging materials.
• Ink Formulation: A component in the manufacture of inks for various printing applications.
• Biomedical Staining: Potential use as a biological stain in laboratory and histological applications.
• Food Contact Material Coloring: For coloring materials that may come into contact with food, subject to specific regulatory compliance.

Basic Information

Product Name	C.I. Acid Red 228
CAS No.	12270-01-8
Molecular Formula	C23H21N5Na2O8S2
Molecular Weight	621.55 g/mol
Synonyms	Acid Red 228; C.I. 17030; Acid Leather Red BG; Acid Leather Red B; Nylosan Red F-3GL; Telon Red F3GL; Supranol Red 3GW; Acid Fast Red A2B; Amido Naphthol Red G; Acid Brilliant Red 3B
EINECS	Contact for details

Quality Control

Our production of C.I. Acid Red 228 adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. Each lot is tested against key parameters including color strength, shade, solubility, and impurity profile. Certificates of Analysis (COA) documenting purity, heavy metal content, and other relevant specifications are available upon request to support your quality assurance processes.

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	Red to dark red powder
Identification (IR)	Conforms to standard
Color Strength	100 ± 3% (vs. Standard)
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 1.0%
Ash Content	≤ 1.0%
Heavy Metals (as Pb)	≤ 50 ppm
Solubility in Water	Conforms
Shade	Conforms to standard

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