Description

5-(Acetylamino)-4-Hydroxy-3-[(2-Hydroxy-5-Nitrophenyl)Azo]-2,7-Naphthalenedisulfonic Acid Disodium Salt is a high-purity, water-soluble azo dye intermediate and analytical reagent. This compound is valued for its precise chromophoric properties and consistent performance in demanding synthesis and diagnostic applications. It is primarily utilized by manufacturers in the specialty dyes, biological staining, and analytical chemistry sectors who require reliable, high-quality chemical building blocks.

Application

• Key intermediate for the synthesis of specialized azo dyes and pigments used in textiles, inks, and coatings.
• Biological staining agent in histology and microscopy for tissue sample analysis.
• Chromogenic substrate or reagent in clinical diagnostic kits and biochemical assays.
• Complexometric indicator in analytical chemistry for titration processes.
• Research and development of novel colorants and functional materials in academic and industrial labs.
• Potential use in photometric analysis and sensor technology due to its light-absorbing characteristics.

Basic Information

Product Name	5-(Acetylamino)-4-Hydroxy-3-[(2-Hydroxy-5-Nitrophenyl)Azo]-2,7-Naphthalenedisulfonic Acid Disodium Salt
CAS No.	4540-06-1
Molecular Formula	C18H12N4Na2O11S2
Molecular Weight	570.41 g/mol
Synonyms	Acid Orange 12; C.I. 15970; 2,7-Naphthalenedisulfonic acid, 5-(acetylamino)-4-hydroxy-3-[(2-hydroxy-5-nitrophenyl)azo]-, disodium salt; 5-Acetamido-4-hydroxy-3-[(2-hydroxy-5-nitrophenyl)azo]naphthalene-2,7-disulfonic acid disodium salt; Orange G; Wool Orange G; Disodium 5-acetamido-4-hydroxy-3-[(2-hydroxy-5-nitrophenyl)hydrazinylidene]naphthalene-2,7-disulfonate
EINECS	Contact for details

Quality Control

Our production of 5-(Acetylamino)-4-Hydroxy-3-[(2-Hydroxy-5-Nitrophenyl)Azo]-2,7-Naphthalenedisulfonic Acid Disodium Salt adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing to ensure high purity, consistent chroma value, and batch-to-batch reproducibility. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with each shipment to support your quality assurance processes.

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). This product is hygroscopic (moisture-sensitive); ensure the container is sealed after each use to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Orange to reddish-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Heavy Metals (as Pb)	≤ 20 ppm
Water Solubility	Freely soluble

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