Description

1-Naphthalenesulfonic acid, 6-(3-chloro-2-hydroxy-5-nitrophenyl)azo-5-hydroxy-, monosodium salt, mixt. with 4-4-(3-chloro-2-hydroxy-5-nitrophenyl)azo-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-ylbenzenesulfonic acid monosodium salt is a high-purity, complex azo dye intermediate. This compound is valued for its ability to impart specific, stable color properties in demanding industrial applications. It is primarily required by manufacturers in the textile, leather, and specialty ink industries for producing high-performance pigments and dyes.

Application

• Primary use as a dye intermediate for the synthesis of high-grade, complex azo dyes and pigments.
• Textile dyeing and printing, particularly for synthetic fibers requiring colorfastness and chemical resistance.
• Leather finishing and coloring processes to achieve durable and vibrant hues.
• Manufacture of specialty inks, including those for security printing and high-performance applications.
• Production of colorants for plastics and polymers where thermal stability is required.
• Research and development of novel chromophores and functional dyes in academic and industrial laboratories.

Basic Information

Item	Detail
Product Name	1-Naphthalenesulfonic acid, 6-(3-chloro-2-hydroxy-5-nitrophenyl)azo-5-hydroxy-, monosodium salt, mixt. with 4-4-(3-chloro-2-hydroxy-5-nitrophenyl)azo-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-ylbenzenesulfonic acid monosodium salt
CAS No.	8006-02-8
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	C.I. Acid Black 52; Acid Black 52; Lissamine Black 12B; Naphthalene Black 12B; 2,7-Naphthalenedisulfonic acid, 4-hydroxy-5-[[2-hydroxy-5-nitro-3-(phenylazo)phenyl]azo]-, disodium salt (component); Mordant Black 17; Azo Black; Benzenesulfonic acid, 4-[[3-chloro-2-hydroxy-5-nitrophenyl]azo]-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl-, monosodium salt (component)
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to rigorous quality control protocols to ensure batch-to-batch consistency and performance. Each lot is analyzed against stringent in-house specifications. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment to support your quality assurance processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents and incompatible materials. This material is light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Dark powder or granules
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm
Water Solubility	Conforms

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