Description

Mordant Black 17 is a high-purity, synthetic azo dye complexing agent widely used as a metallochromic indicator. Its core value lies in its selective and sharp color change in the presence of specific metal ions, enabling precise endpoint detection in complexometric titrations. This product is essential for analytical laboratories and quality control departments in industries such as water treatment, metallurgy, and chemical manufacturing where accurate metal ion quantification is critical.

Application

• Complexometric Titration Indicator: Primary application as an indicator for the titration of calcium, magnesium, and other metal ions with EDTA.
• Water Hardness Analysis: Used in standard methods for determining total hardness (calcium and magnesium) in water samples.
• Metallurgical Analysis: Employed in the analysis of ores, alloys, and metal plating solutions.
• Dyeing and Staining Agent: Functions as a mordant dye for textiles and as a biological stain in microscopy.
• Chelometric Reagent: Serves as a reagent in studies of metal complex formation and stability constants.
• Industrial Process Control: Applied in monitoring metal ion concentrations in chemical process streams and effluent treatment.

Basic Information

Product Name	Mordant Black 17
CAS No.	2538-85-4
Molecular Formula	C20H12N3O7SNa
Molecular Weight	461.38 g/mol
Synonyms	Eriochrome Black T; Solochrome Black T; Chrome Black ET; CI 14645; Mordant Black 11; 1-(1-Hydroxy-2-naphthylazo)-6-nitro-2-naphthol-4-sulfonic acid sodium salt; Sodium 1-(1-hydroxy-2-naphthylazo)-6-nitro-2-naphthol-4-sulfonate
EINECS	219-793-8

Quality Control

Our Mordant Black 17 is manufactured under strict quality management protocols to ensure batch-to-batch consistency and performance reliability for analytical applications. Each lot is tested against stringent in-house specifications for purity, indicator performance, and impurity profile. A comprehensive Certificate of Analysis (COA) detailing assay, loss on drying, and heavy metal content is provided with every shipment to support your quality assurance requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); ensure the container is kept tightly sealed when not in use to prevent absorption of atmospheric moisture, which can affect performance.

Specification

Item	Specification
Appearance	Brownish-black powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
pH (1% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	≤ 20 ppm
Indicator Performance	Passes test

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