Description

C.I. Acid Red 225 is a synthetic, water-soluble monoazo acid dye known for its bright and vivid red color. It is a critical component for achieving durable and vibrant coloration on protein-based fibers like wool, silk, and nylon, as well as leather. This dye is essential for manufacturers in the textile, leather finishing, and specialty paper industries seeking consistent, high-quality red shades with good fastness properties. Its reliable performance makes it a staple for dyeing operations requiring precise color matching and batch-to-batch consistency.

Application

• Primary dyeing of wool, silk, and other protein-based natural fibers.
• Coloration of polyamide fibers, including nylon, for textiles and carpets.
• Leather dyeing and finishing for apparel, upholstery, and accessories.
• Staining and coloring of specialty papers and paper products.
• Ink formulation for specific marking and printing applications.
• As a colorant for anodized aluminum in certain industrial processes.

Basic Information

Product Name	C.I. Acid Red 225
CAS No.	12220-25-6
Molecular Formula	C23H21N4NaO8S2
Molecular Weight	576.55 g/mol
Synonyms	Acid Red 225; C.I. 22870; Acid Leather Red G; Nylosan Red F-3GL; Telon Red F3GL; Amido Naphthol Red G; Acid Fast Red A; 5-(Acetylamino)-4-hydroxy-3-[(2-methoxy-5-methyl-4-sulfophenyl)azo]-2,7-naphthalenedisulfonic Acid Trisodium Salt
EINECS	Contact for details

Quality Control

Our production of C.I. Acid Red 225 adheres to stringent quality management protocols to ensure product purity, color strength, and consistency. Each batch is analyzed against key parameters including spectrophotometric analysis for shade and strength, and HPLC for purity and impurity profiling. A Certificate of Analysis (COA) detailing these results is provided with every shipment to guarantee it meets your specific application requirements and industry standards.

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.

Specification

Item	Specification
Appearance	Red to dark red powder
Identification (IR)	Conforms to standard
Color Strength	100 ± 3% (vs. Standard)
Hue	Within agreed tolerance
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 0.5%
pH (1% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	≤ 50 ppm

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