Description

Acid Brown 30 is a synthetic azo dye belonging to the acid dye class, known for its excellent affinity for protein fibers like wool, silk, and nylon. This dye is valued for its ability to produce rich, durable brown shades with good light and wash fastness properties. It is primarily used in the textile industry for dyeing and printing, as well as in the coloration of leather and paper products.

Application

• Textile Dyeing: Primary application for dyeing wool, silk, and polyamide (nylon) fibers to achieve a range of brown hues.
• Leather Coloration: Used in the tanning industry for dyeing leather goods, providing consistent and vibrant color.
• Paper Staining: Employed in the production of specialty papers, including decorative and packaging materials.
• Ink Formulation: A component in the manufacture of inks for various printing applications.
• Biomedical Staining: Potential use as a biological stain in laboratory settings for histological applications.

Basic Information

Product Name	Acid Brown 30
CAS No.	12238-95-8
Molecular Formula	C32H24N8Na4O14S4
Molecular Weight	984.84 g/mol
Synonyms	Acid Brown G; C.I. Acid Brown 30; Acid Leather Brown G; Lissamine Brown G; Acid Fast Brown G; Wool Fast Brown G; Acid Brown 30 (C.I. 17605); Tetrasodium 6,6'-((3,3'-dimethoxy[1,1'-biphenyl]-4,4'-diyl)bis(azo))bis(4-amino-5-hydroxynaphthalene-2,7-disulfonate)
EINECS	235-447-5

Quality Control

Our Acid Brown 30 is manufactured under a stringent quality management system to ensure batch-to-batch consistency and performance. Each lot is tested against key parameters including color strength, shade, solubility, and impurity profile. A Certificate of Analysis (COA) detailing purity, physical properties, and conformance to specification is provided with every shipment.

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 light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Brown powder or granules
Identification (IR)	Conforms to standard
Assay (HPLC)	Min. 95%
Color Strength	100 ± 3%
Moisture Content	Max. 5.0%
Water Solubility	Conforms
pH (1% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	Max. 20 ppm

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