Description

C.I. Acid Black 187 is a high-performance, synthetic acid dye belonging to the azo chemical class, widely recognized for its deep black shade and excellent fastness properties. This dye is engineered to deliver superior color strength and consistency, which is critical for achieving uniform and durable coloration in demanding industrial applications. It is an essential material for manufacturers in the textile, leather, and paper industries who require a reliable and high-quality black dye for nylon, wool, silk, and other polyamide fibers.

Application

• Primary dyeing of nylon, wool, and silk textiles to achieve deep, level black shades.
• Leather finishing and dyeing for footwear, upholstery, and automotive interiors.
• Paper coloration, including specialty papers and packaging materials.
• Ink formulation for jet printing and other specialty printing applications.
• Dyeing of polyamide-based technical textiles and carpets.
• As a colorant for anodized aluminum and other metal surfaces.

Basic Information

Item	Details
Product Name	C.I. Acid Black 187
CAS No.	61901-11-9
Molecular Formula	C40H23N7Na4O13S4
Molecular Weight	1085.88 g/mol
Synonyms	Acid Black 187; C.I. 15711; Acid Leather Black NB; Nylosan Black N-BL; Telon Black BGL; Acidol Black M-BL; Erionyl Black BGL; Supranol Black BGL; Acid Black NB; Black 187
EINECS	Contact for details

Quality Control

Our production of C.I. Acid Black 187 adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. Each lot is subjected to comprehensive analytical testing, including spectrophotometric analysis for strength and shade, and chromatography for purity. Certificates of Analysis (COA) detailing specific test results are available upon request to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture, which can affect product performance.

Specification

Item	Specification
Appearance	Black powder or granules
Identification (IR)	Conforms to standard
Color Strength	100 ± 3% (vs. Standard)
Shade	Conforms to standard
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 1.0%
pH (1% Solution)	6.0 - 8.0
Fastness Properties	Contact for details

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