Description

Acid Brown 325 is a synthetic organic dye belonging to the acid dye class, widely used for its strong affinity to protein fibers. This high-performance dye is valued for its excellent color fastness properties, including good light and wash fastness, making it a reliable choice for demanding applications. It is primarily utilized in the textile and leather industries for dyeing wool, silk, and nylon, as well as in the coloration of paper and specialty inks.

Application

• Primary dyeing of wool and wool-blend textiles.
• Coloration of silk fabrics and garments.
• Dyeing of nylon fibers for carpets, apparel, and technical textiles.
• Leather finishing and dyeing for upholstery, footwear, and accessories.
• Paper coloration for specialty packaging and decorative papers.
• Manufacture of inks for writing, printing, and marking.
• Historical staining applications in microscopy and biological research.
• As a colorant in the production of wood stains and coatings.

Basic Information

Product Name	Acid Brown 325
CAS No.	61967-97-3
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Acid Brown 325; C.I. Acid Brown 325; Acid Leather Brown 325; Acid Fast Brown 325; Brown 325; Acid Dye Brown 325; Lanasyn Brown 325; Telon Brown 325; Supranol Brown 325
EINECS	Contact for details

Quality Control

Our Acid Brown 325 is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing to ensure consistent shade, strength, and purity. A Certificate of Analysis (COA) detailing key parameters such as color strength, solubility, and impurity profile is provided with each shipment to guarantee it meets your specific application requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed after each use to prevent moisture absorption, which can affect product performance.

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 (Light, Wash)	≥ Grade 4 (Typical)

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