Description

Calcichrome CAS NO 3810-39-7 is a specialized metallochromic indicator and complexometric reagent primarily used for the selective detection and titration of calcium ions. Its core value lies in its high sensitivity and specificity for calcium, providing a sharp, clear color change at the endpoint of complexometric titrations. This makes it an essential analytical tool for quality control and research laboratories in the pharmaceutical, food & beverage, and water treatment industries, where precise calcium quantification is critical.

Application

• Complexometric Titration: Primary use as a metallochromic indicator for the direct or indirect titration of calcium ions using EDTA or similar chelating agents.
• Clinical & Pharmaceutical Analysis: Determination of calcium content in serum, urine, and various pharmaceutical formulations to ensure dosage accuracy and product quality.
• Food & Beverage Quality Control: Analysis of calcium fortification levels in dairy products, infant formula, juices, and dietary supplements.
• Water Hardness Testing: Used in procedures to measure calcium concentration, a key component of water hardness, in industrial and municipal water supplies.
• Biochemical Research: A research tool for studying calcium-binding proteins, cellular calcium flux, and other calcium-dependent biochemical processes.
• Industrial Process Control: Monitoring calcium levels in chemical manufacturing, boiler feed water, and other industrial processes where scale formation is a concern.

Basic Information

Product Name	Calcichrome
CAS No.	3810-39-7
Molecular Formula	C30H26N6O16S4Na4
Molecular Weight	994.82 g/mol
Synonyms	Calcichrome; NSC 113999; 3,3'-Bis[N,N-bis(carboxymethyl)aminomethyl]-o-cresolsulfonphthalein tetrasodium salt; o-Cresolphthalein Complexone; CPC; Phthalein Purple; o-Cresolphthalein-3',3''-bis(methyliminodiacetic acid); Calcium Colorimetric Indicator
EINECS	223-286-3

Quality Control

Our Calcichrome is manufactured under strict quality management systems to ensure batch-to-batch consistency and reliability for analytical applications. Each lot undergoes rigorous testing, including identification, purity assay, and performance validation in standard calcium titration methods. A comprehensive 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 place at a controlled room temperature (15-25°C). The product is light-sensitive and should be handled and stored accordingly to maintain stability and performance.

Specification

Item	Specification
Appearance	Dark purple to brown powder
Identification (IR)	Conforms to structure
Assay (Titration)	≥ 95.0%
Loss on Drying	≤ 5.0%
Heavy Metals (as Pb)	≤ 20 ppm
Performance Test	Passes standard calcium titration endpoint test

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