Description

Acid Brown 98 is a synthetic organic dye belonging to the acid dye class, widely recognized for its application in textile coloration. This product is valued for its ability to provide consistent, vibrant brown shades with good fastness properties on protein fibers like wool, silk, and nylon. It is an essential material for dye houses and chemical manufacturers serving the textile, leather, and specialty paper industries globally.

Application

• Textile Dyeing: Primary application for dyeing wool, silk, and polyamide (nylon) fibers to achieve durable brown hues.
• Leather Finishing: Used in the coloration of leather goods, providing rich color and penetration.
• Paper Staining: Employed in the production of specialty and decorative papers requiring colorfastness.
• Ink Formulation: A colorant component in the manufacture of certain inks for industrial marking or packaging.
• Biological Staining: Potential use as a histological stain in laboratory settings for microscopic analysis.
• Polymer Coloring: Can be incorporated into synthetic polymers and plastics for mass coloration.

Basic Information

Product Name	Acid Brown 98
CAS No.	12269-88-4
Molecular Formula	C32H24N8Na2O8S2
Molecular Weight	774.69 g/mol
Synonyms	Acid Brown 98; C.I. Acid Brown 98; Acid Leather Brown D; Acidol Brown M-BR; Amacid Brown BRL; Derma Fur Brown BRL; Lanasyn Brown BRL; Supranol Fast Brown BRL; Telon Fast Brown BRL; Acid Fast Brown BRL; C.I. 20195
EINECS	Contact for details

Quality Control

Our Acid Brown 98 is manufactured under a stringent quality management system to ensure batch-to-batch consistency and performance. Each lot is tested against established specifications for color strength, shade, solubility, and impurity profiles. A Certificate of Analysis (COA) detailing purity, physical properties, and conformance is provided with every shipment to support your quality assurance protocols.

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 strong oxidizing agents. The product is hygroscopic (moisture-sensitive); ensure containers are sealed after each use to prevent moisture absorption and caking.

Specification

Item	Specification
Appearance	Brown powder or granules
Identification (IR)	Conforms to standard
Assay (Colorant Content)	≥ 95%
Moisture Content	≤ 5.0%
Water Solubility	Conforms
pH (1% Solution)	6.0 - 8.0
Ash Content	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm

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