Description

6-Hydroxy-5-[(2-Hydroxy-3,5-Dinitrophenyl)Azo]-2-Naphthalenesulfonic Acid Sodium Salt is a high-purity azo dye intermediate and analytical reagent. This compound is valued for its precise chromophoric properties and consistent performance in specialized chemical synthesis. It is primarily utilized by manufacturers and research laboratories in the dye, pigment, and analytical chemistry sectors.

Application

• Key intermediate for the synthesis of specialized azo dyes and pigments, particularly for technical applications.
• Used as a colorimetric reagent and indicator in analytical chemistry for metal ion detection and complexometric titrations.
• Potential component in the research and development of functional dyes for non-textile applications.
• Employed in laboratory settings for teaching and research purposes involving azo coupling reactions and spectrophotometry.
• May serve as a starting material for the preparation of light-absorbing compounds in experimental photochemical studies.

Basic Information

Product Name	6-Hydroxy-5-[(2-Hydroxy-3,5-Dinitrophenyl)Azo]-2-Naphthalenesulfonic Acid Sodium Salt
CAS No.	3838-30-0
Molecular Formula	C₁₆H₉N₄NaO₉S
Molecular Weight	456.32 g/mol
Synonyms	Acid Orange 74; C.I. 18745; Sodium 6-hydroxy-5-[(2-hydroxy-3,5-dinitrophenyl)azo]naphthalene-2-sulfonate; 3,5-Dinitro-2-hydroxyazobenzene-4'-sulfonic acid sodium salt; 2-Naphthalenesulfonic acid, 6-hydroxy-5-[(2-hydroxy-3,5-dinitrophenyl)azo]-, monosodium salt; Mordant Orange 6; Alizarine Orange R; Acid Leather Orange R
EINECS	223-342-7

Quality Control

Our production of 6-Hydroxy-5-[(2-Hydroxy-3,5-Dinitrophenyl)Azo]-2-Naphthalenesulfonic Acid Sodium Salt adheres to stringent in-process controls to ensure batch-to-batch consistency and high purity. Each lot is analyzed against established specifications for identity, assay, and impurity profiles. Certificates of Analysis (COA) documenting these results are available upon request to support your quality assurance protocols.

Storage

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

Specification

Item	Specification
Appearance	Orange to reddish-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.