Description

Nitrosulfonazo Iii is a specialized azo dye and analytical reagent used as a sensitive chromogenic agent for the detection and quantification of specific metal ions. Its value lies in its ability to form highly colored, stable complexes, enabling precise colorimetric analysis in research and industrial quality control. This product is essential for analytical chemists and laboratories in sectors such as environmental monitoring, metallurgy, and pharmaceutical research, where accurate trace metal analysis is critical.

Application

• Spectrophotometric Determination of rare earth elements and transition metals in geological and environmental samples.
• Analytical Reagent in laboratory settings for the colorimetric assay of specific cations like calcium, magnesium, or barium.
• Research & Development tool in inorganic and coordination chemistry for studying metal-ligand interactions.
• Quality Control in metallurgical industries for analyzing metal purity and alloy composition.
• Educational Use as a demonstrative reagent in university chemistry courses for teaching complexometric titration and spectroscopy principles.
• Indicator in certain titration methods where a sharp color change is required at the endpoint.

Basic Information

Product Name	Nitrosulfonazo Iii
CAS No.	1964-89-2
Molecular Formula	C22H14N4O14S3Na2
Molecular Weight	684.54 g/mol
Synonyms	Nitrosulfonazo III; 2,7-Bis(4-nitro-2-sulfophenylazo)chromotropic acid disodium salt; 3,6-Bis[(4-nitro-2-sulfophenyl)azo]-4,5-dihydroxy-2,7-naphthalenedisulfonic acid disodium salt; NSC 403796; Nitrosulphonazo III; p-Nitrosulfonazo III
EINECS	Contact for details

Quality Control

Our Nitrosulfonazo Iii is manufactured under strict quality management protocols. Each batch undergoes rigorous analytical testing, including purity assay by HPLC and identity confirmation by FT-IR, to ensure it meets the high standards required for precise analytical work. A comprehensive Certificate of Analysis (COA) detailing purity, absorbance characteristics, and other critical parameters is provided with every shipment to guarantee batch-to-batch consistency and performance reliability.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at a controlled room temperature (15-25°C). Keep the container tightly sealed to minimize exposure to atmospheric moisture.

Specification

Item	Specification
Appearance	Dark brown to purple-brown powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0 %
Absorbance (Lambda max)	Conforms to standard range
Solubility	Soluble in water, slightly soluble in ethanol

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