Description

3-[(4-Nitrophenyl)Azo]-5-[(6-Sulpho-1-Naphthyl)Azo]Salicylic Acid, Sodium Salt is a high-purity, water-soluble azo dye intermediate. This compound is valued for its strong chromophoric properties and ability to form stable, intense color complexes. It is primarily required by manufacturers in the dye and pigment industries for producing specialized colorants, as well as by research and analytical laboratories for use as a chemical reagent and indicator.

Application

• Primary Intermediate for the synthesis of specialized azo dyes and pigments, particularly for textiles and inks.
• Chemical Reagent in analytical chemistry for colorimetric assays and as a pH or metal ion indicator.
• Research & Development tool in organic synthesis and material science for studying azo coupling reactions.
• Specialty Colorant for niche applications requiring specific lightfastness and solubility properties.
• Biological Staining agent in histological and microbiological laboratory procedures.

Basic Information

Product Name	3-[(4-Nitrophenyl)Azo]-5-[(6-Sulpho-1-Naphthyl)Azo]Salicylic Acid, Sodium Salt
CAS No.	98072-17-4
Molecular Formula	C23H14N5NaO7S
Molecular Weight	519.44 g/mol
Synonyms	Acid Red 299 (C.I. 18130); Sodium 3-[(4-nitrophenyl)azo]-5-[(6-sulfo-1-naphthyl)azo]salicylate; 3-[(p-Nitrophenyl)azo]-5-[(6-sulfo-1-naphthyl)azo]salicylic acid sodium salt; 5-[(6-Sulfo-1-naphthalenyl)azo]-3-[(4-nitrophenyl)azo]-2-hydroxybenzoic acid sodium salt; 2-Hydroxy-5-[(6-sulfo-1-naphthyl)azo]-3-[(4-nitrophenyl)azo]benzoic acid sodium salt; Azo dye intermediate 98072-17-4; C.I. Acid Red 299
EINECS	Contact for details

Quality Control

Our 3-[(4-Nitrophenyl)Azo]-5-[(6-Sulpho-1-Naphthyl)Azo]Salicylic Acid, Sodium Salt is manufactured under strict quality control protocols to ensure batch-to-batch consistency and high purity. Each lot is tested against rigorous in-house specifications, which typically include identity confirmation, assay, and impurity profiling. A Certificate of Analysis (COA) detailing all test results is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); ensure the container is kept tightly sealed when not in use to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Water Solubility	Freely 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.