Description

Naphtholblackb CAS NO 735-19-3 is a synthetic organic dye belonging to the azo dye class, valued for its strong coloring properties and chemical stability. This compound is essential for industries requiring deep, durable black shades in various substrates. It is primarily utilized in the textile, leather, and paper manufacturing sectors, as well as in specialized applications for inks and biological staining.

Application

• Textile Dyeing: Primary application for dyeing cotton, wool, and synthetic fibers to achieve a deep black color.
• Leather Finishing: Used in the dyeing process for leather goods, providing consistent and rub-fast coloration.
• Paper Coloring: Employed in the production of colored papers and paperboard.
• Ink Formulation: A key pigment for manufacturing printing inks, including flexographic and gravure inks.
• Biological Staining: Used in histology and microscopy as a staining agent for tissue samples.
• Plastics and Polymers: Incorporated as a colorant for certain plastics and polymeric materials.

Basic Information

Product Name	Naphtholblackb
CAS No.	735-19-3
Molecular Formula	C22H14N6Na2O9S2
Molecular Weight	616.49 g/mol
Synonyms	Acid Black 1; Naphthalene Black 12B; C.I. 20470; Amido Black 10B; Aniline Blue Black; Buffalo Black NBR; Naphthol Blue Black; Acid Blue Black; Eriosin Blue Black B; Wool Black 6BN
EINECS	Contact for details

Quality Control

Our Naphtholblackb is manufactured under strict quality management systems to ensure batch-to-batch consistency and high purity. Each lot is tested against stringent in-house specifications, which typically include parameters for identity, assay, and impurity profiles. Certificates of Analysis (COA) detailing the results of these tests are available upon request 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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Dark blue-black to black powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm

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