Calmagite Indicator, 0.1% Aqueous

The solution’s primary benefit is its precise 0.1% aqueous concentration and its function as a reliable indicator. Calmagite forms a distinct wine-red complex with Ca²⁺ and Mg²⁺ ions at alkaline pH. During titration with EDTA, the indicator is released from the complex, resulting in a sharp, unmistakable color change from wine-red to pure blue at the equivalence point. This pre-mixed formulation eliminates the complex and time-consuming steps of in-house preparation, guaranteeing maximum consistency and reproducible results for critical environmental and water quality analysis.

Features:

• Sharp Visual Endpoint: The dramatic color shift from red to blue allows for high precision in determining the equivalence point, reducing user error and increasing titration accuracy.
• Ready-to-Use Formula: Pre-standardized at 0.1% concentration to save preparation time and eliminate the risk of contamination or concentration errors associated with dry-powder mixing.
• Broad Application: Essential for testing municipal water, boiler feedwater, cooling tower water, and environmental samples according to Standard Methods for the Examination of Water and Wastewater.
• Consistent Quality: Manufactured by LabChem Inc. under strict quality control to ensure lot-to-lot reliability.

Analytical Titration Tips:

• pH Management: Calmagite requires a stable alkaline environment (pH 10.0 ± 0.1) to function correctly. Always use a proper Ammonia-Ammonium Chloride buffer before adding the indicator to ensure the color change is accurate and sharp.
• Interference: High concentrations of heavy metals like copper, iron, or manganese can "poison" the indicator, causing the endpoint to be sluggish or disappear. If this occurs, a masking agent may be required.
• Storage: Keep the bottle tightly sealed when not in use. While the aqueous formulation is stable, exposure to excessive light or air can lead to degradation over long periods.