Description

Sodium 4-Hydroxy-3-[(2-Hydroxy-1-Naphthyl)Azo]-5-Nitrobenzenesulphonate is a high-purity azo dye intermediate and analytical reagent. This compound is valued for its precise chemical structure and consistent performance in demanding synthesis and detection processes. It is primarily required by manufacturers and research laboratories in the dye, pigment, and analytical chemistry sectors for producing specific colorants and as a chromogenic agent.

Application

• Key intermediate for the synthesis of specific azo dyes and pigments, particularly those requiring a naphthol-based structure.
• Used as a chromogenic reagent in analytical chemistry for the detection and quantification of metal ions.
• Employed in the research and development of specialty colorants for inks, coatings, and plastics.
• Potential use as a staining agent in histological and biological research applications.
• Component in the formulation of indicator solutions for pH or complexometric titrations.
• Starting material for the production of functional dyes used in non-textile applications.

Basic Information

Product Name	Sodium 4-Hydroxy-3-[(2-Hydroxy-1-Naphthyl)Azo]-5-Nitrobenzenesulphonate
CAS No.	3179-84-8
Molecular Formula	C₁₇H₁₀N₃NaO₇S
Molecular Weight	423.33 g/mol
Synonyms	Acid Orange 20; C.I. 14630; 4-Hydroxy-3-[(2-hydroxy-1-naphthalenyl)azo]-5-nitrobenzenesulfonic acid sodium salt; Benzenesulfonic acid, 4-hydroxy-3-[(2-hydroxy-1-naphthyl)azo]-5-nitro-, sodium salt; Sodium 4-hydroxy-3-(2-hydroxy-1-naphthylazo)-5-nitrobenzenesulfonate; 1-Naphthol-2-azo-4-sulpho-2-nitrobenzene sodium salt; Orange GGN; Tropaeolin G
EINECS	221-661-1

Quality Control

Our production of Sodium 4-Hydroxy-3-[(2-Hydroxy-1-Naphthyl)Azo]-5-Nitrobenzenesulphonate adheres to stringent in-process controls to ensure batch-to-batch consistency and high chemical purity. Every lot is analyzed against established specifications, including identity confirmation by FT-IR and purity assessment by HPLC. A comprehensive Certificate of Analysis (COA) detailing all test results 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). Keep away from incompatible materials such as strong oxidizing agents.

Specification

Item	Specification
Appearance	Orange to reddish-brown powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (1% in Water)	Clear, orange solution

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