Description

C.I.Acid Brown 359 is a synthetic acid dye belonging to the azo dye class, identified by CAS No. 61967-99-5. It is valued for its ability to provide consistent, durable brown coloration with good fastness properties on protein-based substrates. This dye is essential for manufacturers in the textile and leather industries seeking reliable and high-quality brown shades for their products.

Application

• Textile Dyeing: Primary application for dyeing wool, silk, and nylon fibers to achieve various shades of brown.
• Leather Finishing: Used in the dyeing of leather goods, including footwear, apparel, and upholstery.
• Paper Staining: Employed for coloring specialty papers where acid-fastness is required.
• Ink Formulation: A component in the manufacture of inks for specific marking and printing applications.
• Biomaterial Staining: Potential use in laboratory settings for histological staining of proteinaceous tissues.

Basic Information

Product Name	C.I.Acid Brown 359
CAS No.	61967-99-5
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Acid Brown 359; C.I. 20195; Acid Leather Brown 2GL; Acid Brown GL; Acid Fast Brown GL; Nylosan Brown E-RL; Telon Brown K-3RL; Amichrome Light Brown GL
EINECS	Contact for details

Quality Control

Our production of C.I.Acid Brown 359 adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance. Each lot is tested against key parameters including color strength, shade, solubility, and impurity profile. Certificates of Analysis (COA) documenting these results 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 incompatible materials. 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

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