Description

Chromazol Ks Benzoic Acid, 3-[(1,8-Dihydroxy-3,6-Disulfo-2-Naphthalenyl)Azo]-2-Hydroxy-5-Sulfo-, Trisodium Salt is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its multi-sulfonated, polyhydroxy structure provides excellent solubility and chelating properties, making it a versatile precursor for the synthesis of specialized dyes and analytical reagents. This compound is primarily required by manufacturers in the textile dyeing, biological staining, and metallurgical analysis sectors, where consistent quality and reliable supply are critical.

Application

• Textile Dye Intermediate: A key precursor for synthesizing specific acid dyes and metal-complex dyes used on wool, silk, and polyamide fibers.
• Biological Staining Agent: Used in the formulation of specialized histological and cytological stains for microscopy.
• Metallochromic Indicator: Functions as a colorimetric indicator in complexometric titrations for the determination of metal ions like aluminum, iron, and rare earth elements.
• Analytical Reagent: Employed in laboratory settings for the spectrophotometric detection and quantification of specific metal cations.
• Chelating Agent Synthesis: Serves as a building block for creating advanced chelating polymers and ligands.
• Ink & Pigment Manufacturing: Used in the production of specialized inks and colorants requiring specific hue and stability properties.

Basic Information

Item	Detail
Product Name	Chromazol Ks Benzoic Acid, 3-[(1,8-Dihydroxy-3,6-Disulfo-2-Naphthalenyl)Azo]-2-Hydroxy-5-Sulfo-, Trisodium Salt
CAS No.	55306-09-7
Molecular Formula	C17H8N2Na3O13S3
Molecular Weight	622.39 g/mol
Synonyms	Chromazol KS; Acid Chrome Blue K; 3-[(1,8-Dihydroxy-3,6-disulfo-2-naphthyl)azo]-2-hydroxy-5-sulfobenzoic acid trisodium salt; Mordant Blue 1; C.I. 43830; Eriochrome Azurol B; Aluminon; Aurintricarboxylic acid trisodium salt
EINECS	Contact for details

Quality Control

Our Chromazol Ks is manufactured under a stringent quality management system. Every batch undergoes comprehensive analytical testing to ensure it meets exacting purity and performance standards for its intended applications. Key parameters such as assay, impurity profile, and solubility are verified. A detailed Certificate of Analysis (COA) is provided with each shipment to guarantee traceability and compliance.

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 nature, the container must be kept sealed to prevent moisture absorption, which can affect product stability and handling properties.

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm
Residue on Ignition	Contact for details

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