Description

Acid Brown 365 is a synthetic organic dye belonging to the acid dye class, identified by CAS No. 63641-88-3. It is valued for its ability to provide durable, vibrant brown coloration to protein-based fibers like wool, silk, and nylon, as well as leather and paper. This dye is essential for manufacturers in the textile, leather finishing, and specialty paper industries seeking consistent, high-quality colorants for their products.

Application

• Textile Dyeing: Primary application for dyeing wool, silk, and nylon fibers, offering good wash and light fastness.
• Leather Coloring: Used in the finishing process to impart rich, uniform brown shades to various types of leather.
• Paper Staining: Employed for coloring specialty papers, including decorative and packaging materials.
• Ink Formulation: A component in the manufacture of certain types of inks for industrial marking or printing.
• Biological Staining: Potential use as a histological stain in laboratory settings for microscopic analysis.
• Wood Staining: Can be utilized to color wood and wood-based products for aesthetic enhancement.

Basic Information

Product Name	Acid Brown 365
CAS No.	63641-88-3
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Acid Brown 365; C.I. Acid Brown 365; Acid Leather Brown 365; Brown 365; Acid Dye Brown 365; Lederbraun 365 (German); Marron Acide 365 (French); (Alternative names may vary by supplier and region)
EINECS	Contact for details

Quality Control

Our Acid Brown 365 is produced under a stringent quality management system to ensure batch-to-batch consistency and performance. Quality parameters including color strength, shade, solubility, and impurity profiles are rigorously tested against established standards. A Certificate of Analysis (COA) detailing these specifications is provided with each shipment to guarantee compliance with your technical requirements.

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. For long-term storage, ensure the original packaging remains sealed to prevent moisture absorption and contamination.

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	Matches reference standard
Solubility in Water	Conforms
Fastness Properties	Contact for details

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