Description

C.I.Acid Black 115 is a synthetic acid dye belonging to the azo chemical class, valued for its deep, rich black shade and excellent fastness properties. This high-performance dye is engineered to deliver consistent, vibrant coloration with strong affinity for protein-based fibers. It is an essential component for manufacturers in the textile and leather industries seeking durable and reliable black dyeing solutions. The compound is identified by the CAS registry number 12238-85-6.

Application

• Textile Dyeing: Primary application for dyeing wool, silk, and nylon fibers to achieve a deep, level black shade with good wash and light fastness.
• Leather Processing: Used in the dyeing of leather goods, providing uniform penetration and a rich, stable black color for upholstery, apparel, and accessories.
• Paper Coloration: Employed in specialty paper production where a deep, permanent black color is required.
• Ink Formulation: A component in the manufacture of certain inks, particularly for applications requiring acid-stable pigments.
• Biomedical Staining: Used in specific histological staining protocols in laboratory settings.

Basic Information

Product Name	C.I. Acid Black 115
CAS No.	12238-85-6
Molecular Formula	C22H14N6Na2O9S2
Molecular Weight	616.49 g/mol
Synonyms	Acid Black 115; C.I. 26905; Acid Leather Black NB; Nylon Fast Black 2B; Amido Black 10B (related); Wool Black 2B; Azo Black; Acid Dye Black 115; Sodium 4-amino-5-hydroxy-3-[(4-nitrophenyl)azo]-6-(phenylazo)naphthalene-2,7-disulphonate
EINECS	Contact for details

Quality Control

Our C.I. Acid Black 115 is manufactured under a strict quality management system to ensure batch-to-batch consistency and performance. Each lot is tested against stringent in-house specifications for critical parameters including color strength, shade, solubility, and impurity profile. A Certificate of Analysis (COA) detailing these results is provided with every shipment to guarantee compliance with your technical 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. The material is light-sensitive (store away from light).

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
Heavy Metals (as Pb)	≤ 20 ppm

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