Description

2-Nitroso-1-Naphthol-4-Sulfonic Acid Hydrate is a specialized organic intermediate and analytical reagent known for its chelating properties. This compound is valued for its role in the precise detection and quantification of specific metal ions in complex matrices. It serves as a critical raw material for researchers and manufacturers in the chemical synthesis, analytical chemistry, and metallurgy sectors, where high-purity reagents are essential for reliable results.

Application

• Analytical Reagent: Primarily used as a sensitive and selective colorimetric reagent for the detection and gravimetric determination of cobalt (Co²⁺) and palladium (Pd²⁺) ions.
• Chelating Agent: Functions as a ligand to form stable, colored complexes with various transition metals, useful in separation and purification processes.
• Chemical Synthesis: Serves as a key intermediate in the synthesis of more complex naphthalene derivatives, dyes, and functional organic compounds.
• Research & Development: Employed in laboratory settings for method development in analytical chemistry and metallurgical analysis.
• Photographic Industry: Historically used in certain photographic processes and sensitizers.
• Catalyst Preparation: Can be utilized in the preparation of metal-organic catalysts or precursors.

Basic Information

Item	Detail
Product Name	2-Nitroso-1-Naphthol-4-Sulfonic Acid Hydrate
CAS No.	1172850-83-7
Molecular Formula	C₁₀H₇NO₆S • xH₂O
Molecular Weight	279.23 (Anhydrous basis)
Synonyms	1-Nitroso-2-naphthol-4-sulfonic acid; 2-Nitroso-1-naphthol-4-sulfonic acid; Nitroso-R-salt; 1,2-Naphthoquinone-1-oxime-4-sulfonic acid; Cobalt reagent; Palladium reagent; Nitroso R Salt; NSC 403697
EINECS	Contact for details

Quality Control

Our 2-Nitroso-1-Naphthol-4-Sulfonic Acid Hydrate is produced under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure identity, purity, and consistency. A Certificate of Analysis (COA) detailing specifications such as assay (by titration or HPLC), loss on drying, and heavy metal content is provided with every shipment to guarantee it meets your application requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C). This material is hygroscopic (moisture-sensitive) and should be handled in a dry environment to prevent degradation. Keep away from strong acids and incompatible materials.

Specification

Item	Specification
Appearance	Yellow to orange-brown crystalline powder
Identification (IR)	Conforms to structure
Assay (Titration)	≥ 95.0% (on anhydrous basis)
Loss on Drying	≤ 5.0 %
Solubility	Soluble in water, alkaline solutions; sparingly soluble in organic solvents
Heavy Metals (as Pb)	≤ 20 ppm

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