Description

Calcein Disodium Salt, Indicator For Com Plexometry CAS NO 108750-13-6 is a high-purity, water-soluble fluorescent dye and metallochromic indicator. It is a critical reagent for the complexometric titration of calcium and other metal ions, offering a sharp and reliable colorimetric endpoint. This product is essential for analytical chemists and quality control laboratories in industries such as pharmaceuticals, water treatment, and food & beverage, where precise metal ion quantification is required.

Application

• Complexometric Titration: Primary indicator for the EDTA titration of calcium (Ca²⁺) and other divalent metal ions in aqueous solutions.
• Biochemical Research: Used as a fluorescent probe for studying calcium flux and membrane integrity in live-cell imaging and flow cytometry.
• Water Hardness Analysis: Determination of total water hardness (calcium and magnesium ions) in environmental and industrial water testing.
• Pharmaceutical QC: Assay of calcium content in raw materials, active pharmaceutical ingredients (APIs), and finished drug products.
• Food & Beverage Testing: Analysis of calcium and mineral content in dairy products, fortified foods, and beverages.
• Industrial Process Control: Monitoring metal ion concentrations in chemical manufacturing, plating baths, and boiler water systems.

Basic Information

Product Name	Calcein Disodium Salt, Indicator For Com Plexometry CAS NO 108750-13-6
CAS No.	108750-13-6
Molecular Formula	C30H24N2Na2O13
Molecular Weight	666.50 g/mol
Synonyms	Calcein, Disodium Salt; Fluorexon; Fluorescein Complexon; NSC 113233; 3,3'-Bis[N,N-bis(carboxymethyl)aminomethyl]fluorescein Disodium Salt; Calcein, Sodium Salt; Calcein W; [Fluorescein-bis(methyliminodiacetic acid)] Disodium Salt
EINECS	Contact for details

Quality Control

Our Calcein 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 industry standards for analytical reagents. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and assay results is provided with every shipment and is available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at a controlled room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); ensure the container is sealed after each use to prevent absorption of atmospheric moisture, which may affect performance.

Specification

Item	Specification
Appearance	Orange to orange-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Fluorescence	Conforms (Qualitative Test)
Solubility (in Water)	Clear, yellow-orange solution
pH (1% Solution)	7.0 - 9.0

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