Description

3-[(5-Chloro-2-Hydroxy-4-Nitrophenyl)Azo]-4,5-Dihydroxy-2,7-Naphthalenedisulfonic Acid Disodium Salt is a high-purity, water-soluble azo dye intermediate and analytical reagent. This compound is valued for its strong chelating properties and vivid colorimetric response, making it essential for precise detection and complexometric titration processes. It is primarily sought by manufacturers and laboratories in the chemical synthesis, analytical chemistry, and metallurgy sectors.

Application

• Complexometric Titration Indicator: Used as a sensitive metallochromic indicator for the titration of metal ions such as calcium, magnesium, and rare earth elements.
• Analytical Reagent: Employed in spectrophotometric analysis and colorimetric assays for the detection and quantification of specific metal cations in solution.
• Dye Intermediate: Serves as a key precursor in the synthesis of specific azo dyes and pigments, particularly those requiring high lightfastness and chelating functionality.
• Research & Development: Utilized in chemical research for studying metal-ligand interactions and developing new analytical methodologies.
• Water Treatment Analysis: Applied in testing water hardness and for monitoring trace metal content in industrial water systems.

Basic Information

Product Name	3-[(5-Chloro-2-Hydroxy-4-Nitrophenyl)Azo]-4,5-Dihydroxy-2,7-Naphthalenedisulfonic Acid Disodium Salt
CAS No.	5850-66-8
Molecular Formula	C₁₆H₈ClN₃Na₂O₁₁S₂
Molecular Weight	579.81 g/mol
Synonyms	Acid Chrome Dark Blue; ACDB; 3-[(5-Chloro-2-hydroxy-4-nitrophenyl)azo]-4,5-dihydroxy-2,7-naphthalenedisulfonic acid disodium salt; C.I. Mordant Blue 29; Chrome Dark Blue; Acid Chrome Blue; 5-Chloro-2-hydroxy-4-[(2-hydroxy-3,6-disulfo-1-naphthyl)azo]benzoic acid disodium salt; 1-Naphthalenesulfonic acid, 3-[(5-chloro-2-hydroxy-4-nitrophenyl)azo]-4,5-dihydroxy-, disodium salt
EINECS	227-468-0

Quality Control

Our production of 3-[(5-Chloro-2-Hydroxy-4-Nitrophenyl)Azo]-4,5-Dihydroxy-2,7-Naphthalenedisulfonic Acid Disodium Salt adheres to stringent in-process controls to ensure batch-to-batch consistency and high purity. Every lot is analyzed to confirm identity, potency, and impurity profiles. A Certificate of Analysis (COA) detailing all relevant specifications is provided with each shipment to guarantee compliance with your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect purity and performance.

Specification

Item	Specification
Appearance	Dark blue to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Water Solubility	Completely soluble
Heavy Metals (as Pb)	≤ 20 ppm

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