Description

C.I.Acid Brown 358 is a synthetic acid dye belonging to the azo chemical class, identified by CAS No. 61967-98-4. It is valued for its ability to provide consistent, vibrant brown shades with good fastness properties on protein-based substrates like wool, silk, and leather. This dye is essential for manufacturers in the textile, leather finishing, and specialty paper industries seeking reliable and cost-effective coloration solutions.

Application

• Textile Dyeing: Primary application for dyeing wool, silk, and nylon fibers to achieve durable brown hues.
• Leather Processing: Used in the dyeing of leather goods, including footwear, apparel, and upholstery, for uniform color penetration.
• Paper Coloration: Employed for tinting specialty papers, including decorative and packaging materials.
• Wood Staining: Applicable in stains for wood and other natural fibers to enhance aesthetic appeal.
• Ink Formulation: A component in the manufacture of certain types of inks for industrial marking.
• Biological Staining: Potential use as a histological stain in laboratory settings for microscopic analysis.

Basic Information

Product Name	C.I.Acid Brown 358
CAS No.	61967-98-4
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Acid Brown 358; C.I. 20195; Acid Leather Brown 2GL; Acid Brown GL; Acid Brown A-GL; Dermacid Brown 2GL; Lanaperl Brown GL; Telon Brown AGL
EINECS	Contact for details

Quality Control

Our production of C.I.Acid Brown 358 adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. Every lot is tested against key parameters including color strength, shade, solubility, and fastness properties. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and conformance to specification is provided with each shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, 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	Brown powder or granules
Identification (IR)	Conforms to standard
Color Strength	100 ± 3% (vs. Standard)
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 1.0%
Shade	Conforms to standard
Solubility in Water	Conforms
Fastness Properties	To be specified per grade

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