Description

Benzenesulfonic Acid, Hydroxy-, Monosodium Salt, Polymer With Formaldehyde And 4,4-Sulfonylbisphenol is a specialized polymeric sulfonate compound, CAS 71832-81-0, engineered for high-performance applications requiring thermal stability and ionic functionality. This material is valued for its role as a key intermediate or functional additive in advanced material synthesis. It is primarily sought by manufacturers in the polymer, specialty chemical, and electronics industries for developing flame-retardant materials, ion-exchange resins, and high-temperature polymers.

Application

• Polymer Modification: Acts as a comonomer or additive to impart sulfonate groups, enhancing hydrophilicity, flame retardancy, or ionic conductivity in engineering plastics and high-performance polymers.
• Ion-Exchange Resins: Serves as a critical component in the synthesis of specialty cation-exchange resins for water treatment, catalysis, and chemical separation processes.
• Flame Retardant Synergist: Used in formulations for thermoplastics and thermosets, particularly where sulfone and phenolic structures contribute to char formation and thermal stability.
• Dispersant & Stabilizer: Functions as a polymeric dispersant for pigments, fillers, and other solids in advanced coating and composite systems.
• Electronics Materials: Employed in the development of polyelectrolytes or membrane materials for specialized electronic and energy storage applications.
• Adhesive & Sealant Formulations: Provides enhanced adhesion and chemical resistance in high-performance adhesive systems.

Basic Information

Product Name	Benzenesulfonic Acid, Hydroxy-, Monosodium Salt, Polymer With Formaldehyde And 4,4-Sulfonylbisphenol
CAS No.	71832-81-0
Molecular Formula	(C6H4O4SNa · C6H6O · C12H10O4S)n (Polymeric)
Molecular Weight	Polymer - Contact for details
Synonyms	4-Hydroxybenzenesulfonic acid, monosodium salt, polymer with formaldehyde and 4,4'-sulfonyldiphenol; Phenolsulfonic acid, sodium salt, polymer with formaldehyde and bisphenol S; Sodium 4-hydroxybenzenesulfonate - formaldehyde - 4,4'-dihydroxydiphenyl sulfone polymer; Poly(sodium 4-hydroxybenzenesulfonate-co-formaldehyde-co-4,4'-sulfonyldiphenol); Bisphenol S - formaldehyde - sodium phenolsulfonate polymer; Sulfonated phenolic resin; Polymeric sodium phenolsulfonate formaldehyde bisphenol S condensate
EINECS	Contact for details

Quality Control

Our products undergo rigorous quality testing to ensure batch-to-batch consistency and compliance with industry standards. Quality parameters are strictly monitored, including sulfonate group content, molecular weight distribution, residual monomers, and thermal properties. Certificates of Analysis (COA) documenting purity, identity, and key specifications are available upon request. Our quality management system supports custom grade development to meet specific application 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). Due to its hygroscopic nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product performance. Keep away from incompatible materials such as strong oxidizing agents.

Specification

Item	Specification
Appearance	Off-white to light tan powder or granules
Identification (IR)	Conforms to structure
Sulfonate Group Content	Contact for details
Moisture Content	< 5.0% (Karl Fischer)
Residual Monomers	< 1.0% (HPLC)
pH (1% Solution)	6.0 - 8.5
Ash Content	Contact for details

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