Description

Mordant Black 3 is a high-purity metallochromic indicator and complexometric dye widely recognized for its critical role in analytical chemistry. Its primary value lies in providing sharp, reliable endpoints for the titration of metal ions, particularly calcium and magnesium, ensuring analytical accuracy and reproducibility. This product is essential for quality control laboratories, water treatment facilities, and research institutions engaged in complexometric analysis and dyeing processes. Mordant Black 3 CAS NO 3564-14-5 is supplied to meet the stringent requirements of industrial and analytical applications.

Application

• Complexometric Titration Indicator: The primary application is as a visual indicator for the EDTA titration of calcium and magnesium ions in water hardness testing and other analytical procedures.
• Metallochromic Dye: Used in the dyeing of textiles, leather, and other materials where it forms stable, colored complexes with metal mordants like chromium and aluminum.
• Analytical Reagent: Employed in laboratory settings for the quantitative determination of various metal ions in solution through spectrophotometric or titrimetric methods.
• Biological Staining: Finds use in histology and microscopy as a staining agent for specific tissue components when complexed with metals.
• Research & Development: Serves as a key chemical in R&D for studying metal-ligand interactions, developing new analytical methods, and synthesizing coordination compounds.

Basic Information

Product Name	Mordant Black 3
CAS No.	3564-14-5
Molecular Formula	C20H12N3O7SNa
Molecular Weight	461.38 g/mol
Synonyms	Eriochrome Black T; Solochrome Black T; 1-(1-Hydroxy-2-naphthylazo)-6-nitro-2-naphthol-4-sulfonic acid sodium salt; Mordant Black 11; CI 14645; Calcon; EDTA Black T; Acid Chrome Black T
EINECS	222-617-2

Quality Control

Our Mordant Black 3 is manufactured under strict quality management systems to ensure batch-to-batch consistency and performance reliability. Each lot is tested against rigorous in-house specifications for purity, color value, and indicator performance. A comprehensive Certificate of Analysis (COA) detailing assay, identification, and impurity profiles 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 a controlled room temperature (15-25°C). Keep away from incompatible materials and sources of ignition. Due to its light-sensitive nature, prolonged exposure to direct light should be avoided to maintain product integrity.

Specification

Item	Specification
Appearance	Dark brownish-black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Solubility	Soluble in water and ethanol
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.