1. Product Overview & Specifications

Basic Parameters

• CAS Number: 2411-89-4
• Molecular Formula: C₃₂H₃₂N₂O₁₂
• Molecular Weight: 636.60 g/mol
• Synonyms: Phthalein Purple, o-Cresolphthalexon, Chelating Indicator
• Appearance: White to off-white crystalline powder

Comparative Analysis

2. Key Applications

Primary Uses

• Clinical Diagnostics: Calcium quantification in serum/urine
• Environmental Analysis: Hardness testing in water
• Pharmaceutical QC: Metal impurity detection
• Research: Kinetic studies of metal-ligand interactions

Technical Advantages

• Detection limit: 0.05 ppm for Ca²⁺
• Stable colorimetric endpoint (≥30 mins)
• Compatible with EDTA titration methods

3. Usage Scenarios

Scenario 1: Water Hardness Testing

Procedure: Dissolve 0.1g in 100mL ammonia buffer (pH 10.5). Titrate with 0.01M EDTA until color changes from pink to colorless.

Scenario 2: Serum Calcium Assay

Protocol: Mix 50μL serum with 2mL indicator solution. Measure absorbance at 575nm against calibration standards.

4. Real-World Client Cases

Case Study 1: Hubei Hongjing Chemical Co., Ltd.

• Application: Quality control of calcium supplements
• Result: Achieved ±2% accuracy in batch testing

Case Study 2: Titan Scientific Co., Ltd.

• Application: Environmental monitoring of industrial wastewater
• Result: Detected Ca²⁺ levels as low as 0.2 ppm

5. Inquiry & Contact

For technical specifications sheets or bulk pricing:

• Email: info@vivalr.com
• Tel: (86) 15866781826

Request a free sample or schedule a product demonstration today.