Description

Sulphur Black 1 CAS NO 1326-82-5 is a high-performance sulfur dye renowned for its deep, intense black coloration and excellent fastness properties. This product is essential for achieving durable and cost-effective dyeing of cellulosic fibers like cotton and viscose. It is a critical raw material for textile manufacturers, leather tanneries, and paper producers seeking a robust and economical black dye solution.

Application

• Textile Dyeing: Primary application for dyeing cotton, linen, viscose, and other cellulosic fabrics to a deep, fast black shade.
• Leather Processing: Used in the dyeing of leather goods, providing good penetration and color fastness.
• Paper Coloration: Employed in the production of colored papers, particularly for deep black or gray tones.
• Wood Staining: Applicable for staining wood, offering a dark, opaque finish.
• Ink Manufacturing: Can be utilized as a pigment or dye component in certain ink formulations.
• Batch Dyeing Processes: Well-suited for exhaust dyeing methods in textile mills due to its application profile.

Basic Information

Product Name	Sulphur Black 1
CAS No.	1326-82-5
Molecular Formula	C22H16N6Na4O13S4
Molecular Weight	844.66 g/mol
Synonyms	Sulfur Black 1; C.I. Sulphur Black 1; C.I. 53185; Immedial Black VSF; Sulphur Black B; Sulphur Black G; Kayaku Sulphur Black B; D&C Black No. 1; Leather Black SB
EINECS	215-473-4

Quality Control

Our Sulphur Black 1 is manufactured under a stringent quality management system to ensure batch-to-batch consistency and performance. Quality is verified through comprehensive testing including strength/shade evaluation, solubility, and fastness property checks against industry benchmarks. A Certificate of Analysis (COA) detailing specific lot parameters 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 and incompatible materials.

Specification

Item	Specification
Appearance	Black powder or granules
Strength (Shade)	Standard Depth (100% ± 5%)
Moisture Content	≤ 5.0%
Water Solubility	To be clear or almost clear solution
Alkali Solubility	Conforms
Fastness Properties (Typical)	Wash: 3-4; Light: 4; Rubbing: 3-4

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