Description

Thymolphthalexon, Indicator For Complexometry is a high-purity metallochromic indicator used for the precise endpoint detection in complexometric titrations, particularly those involving EDTA. Its core value lies in providing a sharp, clear color change that ensures accurate and reliable determination of metal ion concentrations in analytical procedures. This product is essential for professionals in analytical chemistry, quality control laboratories, and industrial process monitoring where trace metal analysis is critical.

Application

• Complexometric Titrations: Primary indicator for the titration of calcium, magnesium, and other metal ions with ethylenediaminetetraacetic acid (EDTA).
• Water Hardness Analysis: Determination of total hardness (calcium and magnesium ions) in water treatment facilities and environmental testing.
• Pharmaceutical QC: Used in the analysis of raw materials and finished products where metal ion content must be strictly controlled.
• Food & Beverage Industry: Testing for mineral content and ensuring product safety and compliance with regulatory standards.
• Geochemical & Metallurgical Analysis: Assaying ores, alloys, and geological samples for specific metal constituents.
• Research & Development: A key reagent in method development and analytical research within academic and industrial settings.

Basic Information

Item	Detail
Product Name	Thymolphthalexon, Indicator For Complexometry
CAS No.	62698-55-9
Molecular Formula	C38H44N2O12
Molecular Weight	720.77 g/mol
Synonyms	Thymolphthalein Complexone; Thymolphthalexone; 3,3'-Bis[N,N-bis(carboxymethyl)aminomethyl]thymolphthalein; NSC 113999; TPX; TPC; Thymolphthalein-3',3''-bis(methyliminodiacetic acid); Metalphthalein
EINECS	Contact for details

Quality Control

Our Thymolphthalexon indicator is manufactured under strict quality management systems to ensure batch-to-batch consistency and high performance. Each lot undergoes rigorous analytical testing, including purity assay and functional performance verification in standard titration methods. A Certificate of Analysis (COA) detailing all test results 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, well-ventilated area at a controlled room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); ensure the container is kept tightly sealed after use 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 %
Absorbance Ratio	Meets internal standard
Functional Test	Sharp color transition in standard Ca/Mg titration
Heavy Metals (as Pb)	≤ 20 ppm

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