Description

Alizarin Complexone Dihydrate, Indicator Grade, Pure is a high-purity metallochromic indicator and chelating agent. Its primary value lies in its exceptional selectivity and sensitivity for calcium and other metal ions in complexometric titrations and analytical chemistry. This indicator grade material is essential for researchers and quality control laboratories in the pharmaceutical, environmental, and water treatment industries who require precise and reliable endpoint detection in quantitative analysis.

Application

• Complexometric Titration Indicator: Primary use as a visual and photometric endpoint indicator for the titration of calcium, magnesium, and lanthanide ions with EDTA or similar chelating agents.
• Water Hardness Analysis: Critical component in standardized methods for determining total water hardness (calcium and magnesium concentration) in industrial and municipal water systems.
• Clinical & Pharmaceutical Analysis: Used in the quantitative determination of calcium in biological fluids, pharmaceutical formulations, and raw materials.
• Spectrophotometric Reagent: Employed in the development of sensitive spectrophotometric methods for trace metal analysis due to its color-forming complexes.
• Research & Development: Serves as a key reagent in chemical research involving metal ion binding studies, sensor development, and method validation.
• Quality Control (QC) Testing: Integral to QC protocols in industries where precise metal ion quantification is required, such as in food, beverage, and chemical manufacturing.

Basic Information

Product Name	Alizarin Complexone Dihydrate, Indicator Grade, Pure
CAS No.	455303-00-1
Molecular Formula	C₁₉H₁₅NO₉ • 2H₂O
Molecular Weight	437.35 g/mol (Dihydrate)
Synonyms	Alizarin Complexone; Alizarin Fluorine Blue; 3-[Bis(carboxymethyl)amino-methyl]-1,2-dihydroxyanthraquinone Dihydrate; Alizarin-3-methylamine-N,N-diacetic acid; ALC; Alizarin Complexon; 1,2-Dihydroxyanthraquinon-3-ylmethyliminodiacetic Acid Dihydrate
EINECS	Contact for details

Quality Control

Our Indicator Grade Alizarin Complexone Dihydrate is manufactured under strict quality protocols to ensure batch-to-batch consistency and performance reliability in sensitive analytical applications. Each lot is tested to confirm identity, purity, and suitability for use as a metallochromic indicator. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and performance tests is provided with every shipment.

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 compound is hygroscopic (moisture-sensitive); ensure the container is kept tightly sealed in a low-humidity environment to prevent absorption of water, which may affect its performance and stability.

Specification

Item	Specification
Appearance	Orange to reddish-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0% (on anhydrous basis)
Water Content (KF)	7.0 - 9.0% (corresponding to dihydrate)
Loss on Drying	≤ 0.5% (after drying)
Absorbance Ratio (Performance)	Meets internal standard for indicator suitability
Heavy Metals (as Pb)	≤ 20 ppm

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