Description

2-Naphthalenesulfonic Acid, 3-[[5-Hydroxy-2-[(4-Hydroxyphenyl) Sulfonyl]Phenyl]Methyl]-, Monoammonium Salt is a specialized organic salt with a complex aromatic structure, valued for its functional properties in advanced chemical synthesis. This compound is a key intermediate in the production of high-performance dyes, optical brighteners, and specialty polymers, where its specific sulfonic acid and phenolic groups are essential. It is primarily required by manufacturers in the fine chemicals, textile auxiliaries, and advanced material sectors seeking reliable, high-purity intermediates for their processes.

Application

• Key Intermediate for Optical Brighteners (OBA): A critical building block in the synthesis of stilbene-based optical brightening agents used in paper, textiles, and detergents.
• Dye and Pigment Manufacturing: Serves as a precursor for the production of high-value, water-soluble azo and anthraquinone dyes.
• Specialty Polymer Synthesis: Used to incorporate sulfonate groups into polymers to enhance hydrophilicity, dyeability, or antistatic properties.
• Chemical Research & Development: Employed as a standard or reagent in R&D for developing new functional materials and photoactive compounds.
• Textile Auxiliaries: Potential use in formulating leveling agents, dispersants, or finishing agents for synthetic fibers.
• Analytical Chemistry: May be used as a reference standard or a complexing agent in specific analytical methodologies.

Basic Information

Product Name	2-Naphthalenesulfonic Acid, 3-[[5-Hydroxy-2-[(4-Hydroxyphenyl) Sulfonyl]Phenyl]Methyl]-, Monoammonium Salt
CAS No.	68683-35-2
Molecular Formula	C23H21NO7S2 • NH3 (or C23H24N2O7S2)
Molecular Weight	Approx. 504.58 g/mol
Synonyms	Monoammonium 3-[[5-Hydroxy-2-[(4-hydroxyphenyl)sulfonyl]phenyl]methyl]-2-naphthalenesulfonate; Ammonium 2-Naphthalenesulfonate derivative; 4,4'-Bis[(2-sulfo-1-naphthyl)amino]stilbene-2,2'-disulfonic acid related intermediate; Optical Brightener Intermediate; Stilbene disulfonic acid derivative; OB-1 related intermediate; CBS 127 intermediate (trade name related).
EINECS	Contact for details

Quality Control

Our production of 2-Naphthalenesulfonic Acid, 3-[[5-Hydroxy-2-[(4-Hydroxyphenyl) Sulfonyl]Phenyl]Methyl]-, Monoammonium Salt adheres to stringent quality management protocols to ensure batch-to-batch consistency and high purity. Products undergo rigorous analytical testing, including HPLC for assay and impurity profiling, to meet precise customer specifications. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and related substances is provided with each shipment to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled 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 can affect product stability and performance.

Specification

Item	Specification
Appearance	Off-white to light yellow powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Related Substances (HPLC)	Total impurities ≤ 3.0%
Heavy Metals	≤ 20 ppm
Residue on Ignition	≤ 0.5%

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