Description

Sulphon Black Ra is a synthetic organic dye belonging to the sulfonated azo dye class, identified by CAS No. 6527-60-2. This product is valued for its deep, intense black color and strong affinity for various substrates, making it a critical component in industrial coloration processes. It is primarily required by manufacturers in the textile, leather, and paper industries seeking reliable and consistent dyeing performance.

Application

• Primary dye for textile fibers, including cotton, wool, and silk.
• Coloration agent in leather finishing processes for shoes, bags, and upholstery.
• Pigment for specialty paper products requiring a deep black hue.
• Manufacturing of inks for industrial printing applications.
• Potential use as a colorant in the production of certain plastics and polymers.
• Research and development applications in analytical chemistry as a staining agent.

Basic Information

Product Name	Sulphon Black Ra
CAS No.	6527-60-2
Molecular Formula	C22H14N6Na2O9S2
Molecular Weight	616.49 g/mol
Synonyms	Acid Black 1; Naphthalene Black 12B; C.I. 20470; Sulphon Black R; Acid Leather Black RB; Amacid Black RA; Diamond Black F; Lissamine Black 12B; Sodium 4-amino-5-hydroxy-3-[(4-nitrophenyl)azo]-6-(phenylazo)naphthalene-2,7-disulphonate
EINECS	229-439-2

Quality Control

Our Sulphon Black Ra is manufactured under a stringent quality management system. Each batch undergoes comprehensive analytical testing to ensure it meets precise specifications for color strength, purity, and solubility. Certificates of Analysis (COA) documenting key parameters 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). Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Black powder or granules
Identification (IR)	Conforms to standard
Assay (Dye Content)	Min. 95%
Moisture Content	Max. 5.0%
Water Insoluble Matter	Max. 0.5%
pH (1% Solution)	6.0 - 8.0
Shade	Conforms to standard

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