Description

C.I. Acid Black 71 is a synthetic acid dye belonging to the azo chemical class, widely recognized for its deep, intense black shade. This compound is valued for its excellent tinctorial strength and good lightfastness, making it a reliable colorant for demanding industrial applications. It is primarily utilized by manufacturers in the textile, leather, and paper industries for dyeing protein-based fibers like wool, silk, and nylon, as well as for surface coating applications.

Application

• Primary dyeing of wool, silk, and other protein-based natural fibers.
• Coloration of polyamide (nylon) fibers in the textile industry.
• Leather dyeing for footwear, garments, and upholstery.
• Surface coloring and coating of specialty papers and paperboard.
• Ink formulation for specific printing applications.
• As a colorant for anodized aluminum in certain industrial finishes.

Basic Information

Product Name	C.I. Acid Black 71
CAS No.	127830-14-2
Molecular Formula	C22H14N6Na2O9S2
Molecular Weight	616.49 g/mol
Synonyms	Acid Black 71; C.I. 15711; Acid Leather Black NB; Acid Black NB; Acid Fast Black; Naphthalene Black 10B; Acid Black 10B; Wool Black 6BN
EINECS	Contact for details

Quality Control

Our C.I. Acid Black 71 is manufactured under a strict quality management system to ensure batch-to-batch consistency and performance. Each lot is tested for critical parameters including color strength, shade, solubility, and impurity profile to meet industry specifications. A Certificate of Analysis (COA) detailing these results is provided with every 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 incompatible materials. The product is light-sensitive and should be stored away from direct light exposure to maintain stability.

Specification

Item	Specification
Appearance	Black powder or granules
Identification (IR)	Conforms to standard
Color Strength	100 ± 3% (vs. Standard)
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 1.0%
Shade	Conforms to standard
Solubility in Water	Conforms

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