Description

Calconcarboxylic Acid is a high-purity, specialized organic compound primarily valued as a sensitive and selective metallochromic indicator in complexometric titrations. Its core value proposition lies in providing precise endpoint detection for the titration of calcium and other metal ions, ensuring analytical accuracy and reliability in quality control processes. This product is essential for industries and laboratories requiring stringent quantitative analysis, including pharmaceutical manufacturing, water treatment facilities, and chemical research.

Application

• Complexometric Titration Indicator: Primary use as a visual indicator for the titration of calcium (Ca²⁺) ions with EDTA, offering a sharp color change from pink to blue.
• Water Hardness Analysis: Employed in standard methods for determining calcium and total hardness in industrial water, boiler feed water, and municipal water supplies.
• Pharmaceutical QC Testing: Used in the assay of calcium content in active pharmaceutical ingredients (APIs), nutritional supplements (e.g., calcium carbonate), and related formulations.
• Food & Beverage Industry: Applied in the analysis of calcium fortification levels in dairy products, beverages, and processed foods to ensure nutritional label compliance.
• Research & Development: Serves as a key reagent in chemical research for studying metal-ligand interactions, developing new analytical methods, and in educational laboratory settings.
• Environmental Monitoring: Utilized in soil testing and environmental sample analysis to quantify bioavailable calcium and other divalent cations.

Basic Information

Product Name	Calconcarboxylic Acid
CAS No.	3737-95-9
Molecular Formula	C₂₁H₁₄N₂O₇S
Molecular Weight	438.41 g/mol
Synonyms	Calconcarboxylic Acid; 3-Hydroxy-4-[(2-hydroxy-4-sulfo-1-naphthyl)azo]-2-naphthoic Acid; Calcon Carboxylic Acid; Patton-Reeder Indicator; NN Indicator; Eriochrome Blue Black R; Mordant Black 17; CI 15705; Acid Chrome Dark Blue; Solochrome Dark Blue
EINECS	223-110-4

Quality Control

Our Calconcarboxylic Acid CAS NO 3737-95-9 is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure it meets high-purity standards suitable for analytical and research applications. Key parameters including assay (purity), absorbance characteristics, and suitability as a titration indicator are verified. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with every shipment to guarantee traceability and compliance with your specifications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Keep the container tightly sealed when not in use to minimize exposure to atmospheric moisture and contaminants.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0 %
Suitability Test	Passes as Calcium indicator
Absorbance (Lambda max)	Conforms

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