Description

Acid Black 29 is a synthetic azo dye belonging to the acid dye class, widely recognized for its deep, intense black shade. Its primary value lies in its excellent affinity for protein fibers like wool, silk, and nylon, offering good wash and light fastness properties. This dye is essential for manufacturers in the textile and leather industries seeking to produce durable, high-quality black coloration. It is also utilized in specialized applications such as the dyeing of paper and the preparation of inks.

Application

• Textile Dyeing: Primary application for dyeing wool, silk, and nylon fibers to achieve a deep black color.
• Leather Finishing: Used in the dyeing of leather goods, providing rich and uniform black shades.
• Paper Coloration: Employed in the production of specialty colored papers, including decorative and packaging materials.
• Ink Manufacturing: Serves as a colorant in the formulation of certain types of inks for industrial or artistic purposes.
• Biomedical Staining: Potential use as a biological stain in histological applications, though specific grades are required.

Basic Information

Product Name	Acid Black 29
CAS No.	12217-14-0
Molecular Formula	C22H14N6Na2O9S2
Molecular Weight	616.49 g/mol
Synonyms	Acid Black 29; C.I. 20470; Acid Leather Black NB; Acid Black NB; Naphthalene Black 12B; Acid Black 2B; Lissamine Black 12B; Eriosin Black NB; Acid Black 29 (C.I. 20470); Sodium 4-amino-5-hydroxy-3-[(4-nitrophenyl)azo]-6-(phenylazo)naphthalene-2,7-disulphonate
EINECS	Contact for details

Quality Control

Our Acid Black 29 is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing to ensure consistency in strength, shade, and purity. Key parameters such as dye content, solubility, and fastness properties are verified. A Certificate of Analysis (COA) detailing these specifications is provided with each shipment to guarantee product integrity and 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 and incompatible materials. The product is hygroscopic (moisture-sensitive); ensure the container is properly sealed after each use to prevent moisture absorption.

Specification

Item	Specification
Appearance	Black to dark brown powder
Identification (IR)	Conforms to standard
Assay (Dye Content)	≥ 95%
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 1.0%
Shade	Conforms to standard
Solubility in Water	Conforms
pH (1% Solution)	6.0 - 8.0

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