Description

Acid Black 24 is a synthetic azo dye belonging to the acid dye class, valued for its strong affinity to protein fibers like wool, silk, and nylon. Its primary commercial value lies in providing deep, level shades with good wet fastness properties, making it a reliable choice for demanding textile applications. This dye is essential for manufacturers in the textile, leather, and paper industries seeking consistent, high-quality coloration for their products.

Application

• Textile Dyeing: Primary application for dyeing wool, silk, and nylon fibers, producing deep black to grey shades.
• Leather Finishing: Used in the coloration of leather goods, offering good penetration and color uniformity.
• Paper Staining: Employed for tinting and coloring specialty papers and paper products.
• Ink Formulation: A component in the manufacture of certain inks, particularly for specialized printing applications.
• Biological Staining: Potential use as a histological stain in laboratory settings for microscopic analysis.
• Polyamide Dyeing: Effective for coloring synthetic polyamide materials beyond traditional nylon.

Basic Information

Product Name	Acid Black 24
CAS No.	3071-73-6
Molecular Formula	C36H23N5Na2O6S2
Molecular Weight	731.71 g/mol
Synonyms	Acid Black 24; C.I. 26370; Acid Leather Black NB; Naphthalene Black 12B; Acid Black NB; Acid Leather Black NB; Amido Black 10B (related); C.I. Acid Black 24; Sodium 4-amino-5-hydroxy-3-[(4-nitrophenyl)azo]-6-(phenylazo)naphthalene-2,7-disulfonate
EINECS	221-320-2

Quality Control

Our Acid Black 24 is produced under a stringent quality management system to ensure batch-to-batch consistency and performance reliability. Each lot is tested against key 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 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 and sources of ignition. For long-term storage, ensure the original packaging remains sealed to prevent moisture absorption and contamination.

Specification

Item	Specification
Appearance	Black to dark brown powder
Identification (IR)	Conforms to standard
Assay (Color Strength)	≥ 95% (vs. Standard)
Moisture Content	≤ 5.0%
Water Solubility	Conforms
Shade	Conforms to standard
pH (1% Solution)	6.0 - 8.0

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