Description

Acid Brown 214 is a synthetic acid dye belonging to the azo dye class, valued for its excellent color fastness and dyeing properties on protein fibers like wool, silk, and nylon. It is a critical component for achieving durable and vibrant brown shades in textile manufacturing, offering strong wash and light fastness. This dye is essential for industries requiring high-performance coloration, including textile dyeing, leather finishing, and paper coloration.

Application

• Textile Dyeing: Primary application for dyeing wool, silk, and nylon fibers to achieve a range of brown hues with good fastness properties.
• Leather Finishing: Used in the coloration of leather goods, providing rich, uniform brown colors.
• Paper Coloration: Employed in specialty paper production for tinting and decorative purposes.
• Ink Manufacturing: Serves as a colorant in the formulation of certain inks and toners.
• Biomaterial Staining: Potential use in laboratory settings for staining biological materials in microscopy.

Basic Information

Product Name	Acid Brown 214
CAS No.	37372-87-5
Molecular Formula	C32H21N5Na4O16S4
Molecular Weight	995.78 g/mol
Synonyms	Acid Brown 2R; C.I. Acid Brown 214; Acid Leather Brown 2R; Acidol Brown 2R; Amido Brown 2R; Dermacid Brown 2R; Lissamine Brown 2R; Supranol Brown 2R; Tectilon Brown 2R; 2-Naphthalenesulfonic acid, 7-[[4-[[2-(aminosulfonyl)-4-nitrophenyl]azo]-7-sulfo-1-naphthalenyl]azo]-8-hydroxy-, tetrasodium salt
EINECS	253-515-8

Quality Control

Our Acid Brown 214 is manufactured under strict quality management systems to ensure batch-to-batch consistency and performance. Each lot is tested against stringent in-house specifications for parameters such as color strength, shade, solubility, and impurity profile. A Certificate of Analysis (COA) detailing purity, physical properties, and conformance 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 incompatible materials such as 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% (vs. Standard)
Moisture Content	Max. 5.0%
Water Solubility	Conforms
pH (1% Solution)	6.0 - 8.0
Ash Content	Max. 30%

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