Description

Vinylidenebis(Phosphonic Acid Dimethyl) Ester is a specialized organophosphorus compound that serves as a versatile chemical intermediate. Its value lies in its ability to introduce phosphonate functional groups, which are critical for imparting flame retardancy, scale inhibition, and metal-chelating properties to final products. This chemical is essential for manufacturers in the polymer, water treatment, and specialty chemical synthesis industries seeking to develop high-performance materials.

Application

• Flame Retardant Synergist: Used as a key intermediate in the synthesis of halogen-free, phosphorus-based flame retardants for engineering plastics, textiles, and coatings.
• Scale and Corrosion Inhibitor Precursor: An important building block for manufacturing advanced phosphonate-based inhibitors used in industrial water treatment, cooling towers, and oilfield applications.
• Polymer Modification: Acts as a monomer or cross-linking agent to incorporate phosphonate groups into polymer backbones, enhancing adhesion to metal surfaces, flame resistance, and thermal stability.
• Chelating Agent Synthesis: Serves as a precursor for producing high-efficiency chelating agents used in detergent formulations, pulp & paper processing, and metal cleaning solutions.
• Pharmaceutical & Agrochemical Intermediates: Utilized in the synthesis of bioactive molecules and active ingredients where the phosphonate moiety is required for biological activity.
• Surface Treatment Agent: Employed in formulations for metal surface pretreatment and conversion coatings to improve corrosion resistance and paint adhesion.

Basic Information

Product Name	Vinylidenebis(Phosphonic Acid Dimethyl) Ester
CAS No.	67293-68-9
Molecular Formula	C6H14O6P2
Molecular Weight	244.12 g/mol
Synonyms	Dimethyl Vinylidenediphosphonate; Tetramethyl Ethene-1,1-diyldiphosphonate; Vinylidene Diphosphonic Acid Tetramethyl Ester; 1,1-Bis(dimethoxyphosphoryl)ethene; Ethene-1,1-diylbis(phosphonic acid) tetramethyl ester; VBPA-DME; VDP Tetramethyl Ester
EINECS	Contact for details

Quality Control

Our production of Vinylidenebis(Phosphonic Acid Dimethyl) Ester adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including assay by GC or HPLC, identity confirmation (IR, NMR), and impurity profiling to ensure high purity and batch-to-batch consistency. A detailed Certificate of Analysis (COA) is provided with each shipment, documenting all critical quality parameters.

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 material is hygroscopic (moisture-sensitive); ensure containers are kept sealed to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC/HPLC)	≥ 95.0%
Water Content (KF)	≤ 0.5%
Specific Gravity (20°C)	1.20 - 1.30

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