Description

C.I. Acid Red 158 is a synthetic, water-soluble azo dye belonging to the acid dye class, valued for its bright red hue and good fastness properties. It is a critical coloring agent for protein-based fibers like wool, silk, and nylon, providing excellent leveling and wash-fastness. This dye is essential for manufacturers in the textile, leather, and paper industries seeking vibrant and durable coloration.

Application

• Primary dyeing and printing of wool, silk, and nylon textiles.
• Coloration of leather goods, including footwear, apparel, and accessories.
• Manufacturing of colored paper and paper products.
• As a staining agent in biological and histological applications.
• Ink formulation for specialized printing applications.
• Dyeing of feathers and furs.

Basic Information

Product Name	C.I. Acid Red 158
CAS No.	8004-55-5
Molecular Formula	C32H21N5Na2O8S2
Molecular Weight	729.65 g/mol
Synonyms	Acid Red 158; C.I. 20535; Acid Leather Red BG; Nylosan Red F-3GL; Supranol Red 3BW; Telon Red F3GL; Acid Fast Red A2B; Aminyl Red F-3GL; Acid Brilliant Red 3B; Acid Milling Red 3B
EINECS	Contact for details

Quality Control

Our C.I. Acid Red 158 is manufactured under a strict quality management system. Every batch is tested to ensure consistent strength, shade, and purity, meeting the specifications required for industrial dyeing applications. A comprehensive Certificate of Analysis (COA) detailing purity, solubility, and fastness properties is provided with each shipment.

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. The product is light-sensitive and should be stored away from direct light exposure.

Specification

Item	Specification
Appearance	Red to dark red powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 95%
Moisture Content	≤ 5.0%
Water Solubility	Conforms
Shade & Strength	Matches standard ± 5%
pH (1% Solution)	6.0 - 8.0

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