Description

Phenylphosphonic Acid Disodium Salt is a versatile organophosphorus compound widely utilized as a key intermediate and functional additive. Its primary value lies in its water-soluble, anionic character and its ability to act as a sequestrant, corrosion inhibitor, and flame retardant synergist. This chemical is essential for manufacturers in sectors such as industrial water treatment, polymer modification, and specialty chemical synthesis, where consistent quality and reliable supply are critical.

Application

• Industrial Water Treatment: Acts as an effective scale and corrosion inhibitor in cooling water and boiler systems.
• Polymer & Resin Additive: Serves as a flame retardant synergist and stabilizer in various polymer formulations.
• Chemical Synthesis: A valuable intermediate for producing other phenylphosphonate derivatives and metal-organic frameworks (MOFs).
• Detergent & Cleaning Formulations: Functions as a chelating agent and builder to enhance cleaning efficiency by sequestering metal ions.
• Electroplating & Metal Finishing: Used in bath formulations to improve surface quality and process stability.
• Pharmaceutical & Agrochemical Intermediates: Employed in the synthesis of active ingredients and fine chemicals.

Basic Information

Product Name	Phenylphosphonic Acid Disodium Salt
CAS No.	25148-85-0
Molecular Formula	C6H7Na2O3P
Molecular Weight	204.07 g/mol
Synonyms	Disodium Phenylphosphonate; Phenylphosphonic Acid Sodium Salt; Disodium Phenylphosphonic Acid; Benzenephosphonic Acid, Disodium Salt; Phosphonic Acid, Phenyl-, Disodium Salt; Disodium Monophenylphosphonate; Phenylphosphonate Disodium Salt; Sodium Phenylphosphonate (2:1)
EINECS	246-667-5

Quality Control

Our Phenylphosphonic Acid Disodium Salt is manufactured under a stringent quality management system. Each batch undergoes comprehensive analytical testing to ensure it meets precise specifications for purity, identity, and performance. A detailed Certificate of Analysis (COA) is provided with every shipment, confirming compliance with agreed-upon standards.

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). This product is hygroscopic (moisture-sensitive); the container must be kept tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
pH (5% Solution)	7.0 - 9.0
Water Content (KF)	≤ 2.0%
Heavy Metals (as Pb)	≤ 10 ppm

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