Description

Acid Brown 14 is a synthetic azo dye belonging to the acid dye class, valued for its ability to impart a durable brown color to protein-based fibers. Its primary commercial significance lies in its strong affinity for wool, silk, and nylon, ensuring excellent wash and light fastness properties. This dye is essential for manufacturers in the textile, leather, and paper industries seeking consistent, high-quality coloration for their products.

Application

• Primary dyeing of wool and wool-blend textiles and yarns.
• Coloration of silk fabrics and garments.
• Dyeing of nylon fibers for carpets, apparel, and industrial fabrics.
• Leather finishing and dyeing for upholstery, footwear, and accessories.
• Paper coloration for specialty packaging and decorative papers.
• As a colorant for inks and coatings where acid dye compatibility is required.

Basic Information

Product Name	Acid Brown 14
CAS No.	5850-16-8
Molecular Formula	C22H14N4Na2O9S2
Molecular Weight	604.48 g/mol
Synonyms	Acid Leather Brown D; Acid Brown D; C.I. Acid Brown 14; Acid Fast Brown D; Lissamine Brown B; Wool Fast Brown D; Nylomine Brown C-3R; Brown 14 (Acid Dye); 2,7-Naphthalenedisulfonic acid, 4-hydroxy-3-[(2-hydroxy-1-naphthalenyl)azo]-, disodium salt
EINECS	227-450-8

Quality Control

Our Acid Brown 14 is manufactured under a strict quality management system to ensure batch-to-batch consistency and performance. Each lot is tested for critical parameters including dye content, shade, solubility, and fastness properties. A Certificate of Analysis (COA) detailing purity and specification compliance 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.

Specification

Item	Specification
Appearance	Brown powder
Identification (IR)	Conforms to standard
Assay (Dye Content)	≥ 95%
Moisture Content	≤ 5.0%
Water Solubility	Conforms
Shade	Within agreed tolerance
Fastness to Washing	≥ 4-5 (ISO 105-C03)
Fastness to Light	≥ 5 (ISO 105-B02)

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