Description

C.I.Direct Black 132 is a high-performance, disazo direct dye renowned for its deep, intense black shade and excellent build-up properties. It is a critical component for achieving durable and economical coloration on cellulosic fibers like cotton, viscose, and paper. This dye is essential for textile mills, paper manufacturers, and leather tanneries seeking a cost-effective black with good wash and light fastness for a variety of end products.

Application

• Textile Dyeing: Primary application for dyeing cotton, viscose, rayon, and other cellulosic fibers to a deep black shade.
• Paper Coloring: Used in the mass coloration of paper and paperboard products.
• Leather Finishing: Employed in the dyeing of leather goods to achieve a uniform black color.
• Ink Formulation: A pigment source in the manufacture of certain inks and toners.
• Blend Component: Often used in combination with other direct dyes to adjust shade or improve fastness properties.

Basic Information

Product Name	C.I. Direct Black 132
CAS No.	12221-92-0
Molecular Formula	C40H23N9Na4O13S4
Molecular Weight	1085.88 g/mol
Synonyms	Direct Black 132; Direct Black BN; C.I. 35435; Direct Deep Black EW; Direct Black VSF; Direct Black G; Atul Direct Black VSF; Amanil Black B; Benzo Deep Black EWN
EINECS	Contact for details

Quality Control

Our production of C.I. Direct Black 132 adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. Every lot is tested against key parameters including shade, strength, solubility, and fastness properties. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and performance metrics is provided with each shipment to guarantee it meets your specific application requirements.

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. The product is hygroscopic (moisture-sensitive); ensure containers are sealed after use to prevent moisture absorption and caking.

Specification

Item	Specification
Appearance	Black to Bluish-Black Powder
Identification (IR)	Conforms to Standard
Color Strength	100 ± 3% (vs. Standard)
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 1.0%
pH (1% Solution)	6.0 - 8.0
Shade	Conforms to Standard
Fastness Properties (Typical)	Wash: 3-4; Light: 4-5

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