Description

Solochrome Black F is a high-purity metallochromic indicator dye, widely recognized for its critical role in complexometric titrations. Its primary value lies in providing a sharp, clear color change endpoint for the accurate determination of metal ions such as calcium, magnesium, and zinc. This product is essential for analytical laboratories and quality control departments across various industries. Professionals in water treatment, pharmaceuticals, food & beverage, and metallurgy rely on its consistent performance for precise volumetric analysis.

Application

• Primary indicator for the complexometric titration of calcium and magnesium ions (e.g., in water hardness testing).
• Endpoint detection in the analysis of zinc, cadmium, manganese, and lead ions in various industrial samples.
• Quality control testing in pharmaceutical manufacturing for raw material and finished product assay.
• Analytical procedures in environmental monitoring and wastewater treatment facilities.
• Metallurgical analysis for determining metal content in ores, alloys, and plating baths.
• Standard laboratory reagent for educational and research purposes in analytical chemistry.

Basic Information

Product Name	Solochrome Black F
CAS No.	8027-29-0
Molecular Formula	C20H12N3O7SNa
Molecular Weight	461.38 g/mol
Synonyms	Eriochrome Black F; Mordant Black 11; Calcon; Calconcarboxylic Acid; C.I. 14645; 2-Hydroxy-1-(2-hydroxy-4-sulfo-1-naphthylazo)-3-naphthoic Acid Sodium Salt; 1-(1-Hydroxy-2-naphthylazo)-2-naphthol-4-sulfonic Acid Sodium Salt
EINECS	232-411-9

Quality Control

Our Solochrome Black F is manufactured under a strict quality management system. Each batch undergoes comprehensive testing to ensure it meets the high standards required for analytical applications. Key parameters including identity, purity, and performance in titration are verified. A Certificate of Analysis (COA) detailing all test results is provided with every shipment to guarantee traceability and compliance.

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). Keep the container tightly sealed when not in use to prevent contamination and moisture absorption.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to structure
Assay (Titration)	≥ 85.0% (as dye content)
Loss on Drying	≤ 5.0%
Residue on Ignition (Sulfated Ash)	≤ 30.0%
Performance Test	Clear, sharp color transition in standard EDTA titration
Solubility	Soluble in water and ethanol

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