Description

Thymolphthalein Complexone Disodium Salt is a high-purity, water-soluble metallochromic indicator and chelating agent. Its primary value lies in its exceptional selectivity for calcium and magnesium ions, making it a critical component for precise complexometric titrations in analytical chemistry. This compound is essential for laboratories and quality control departments in the pharmaceutical, water treatment, and food & beverage industries requiring accurate determination of water hardness and metal ion concentrations.

Application

• Complexometric Titrations: Primary use as a specific indicator for the titration of calcium and magnesium ions (water hardness) with EDTA.
• Water Quality Analysis: Standard method for determining total hardness in drinking, process, and wastewater.
• Pharmaceutical QC: Used in the assay of calcium and magnesium in raw materials, excipients, and finished drug products.
• Food & Beverage Testing: Analysis of mineral content, particularly calcium and magnesium, in dairy products, beverages, and nutritional supplements.
• Clinical Diagnostics: Component in reagent kits for the colorimetric determination of calcium in serum and other biological fluids.
• Industrial Process Control: Monitoring water hardness in boiler feed water, cooling towers, and other industrial water systems to prevent scaling.

Basic Information

Product Name	Thymolphthalein Complexone Disodium Salt
CAS No.	85409-48-9
Molecular Formula	C38H40N2O12Na2
Molecular Weight	762.71 g/mol
Synonyms	Thymolphthalein Complexone; Thymolphthalein-3',3''-bis(methyliminodiacetic acid) Disodium Salt; Calconcarboxylic Acid; 3,3-Bis[N,N-bis(carboxymethyl)aminomethyl]thymolphthalein Disodium Salt; NSC 113945; TPCS; TPC Disodium Salt; Thymolphthalexon
EINECS	Contact for details

Quality Control

Our Thymolphthalein Complexone Disodium Salt is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing to ensure high purity, consistent performance, and compliance with relevant analytical reagent standards. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and assay is provided with every shipment to guarantee traceability and reliability for your critical applications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); keep the container tightly sealed to prevent absorption of atmospheric moisture, which may affect performance.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0 %
Heavy Metals (as Pb)	≤ 20 ppm
Performance Test (Titration)	Conforms (Sharp color change endpoint)
Solubility (in Water)	Clear, colorless to faintly blue solution

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