Description

p-Xylylenebisphosphonic Acid is an organophosphorus compound featuring a rigid xylylene backbone linked to two phosphonic acid groups. This structure is critical for its strong chelating and scale inhibition properties, making it a valuable intermediate and functional additive. It is primarily utilized in industrial water treatment, as a precursor for advanced materials, and in specialized chemical synthesis. Global industries rely on this compound for its effectiveness in controlling mineral deposits and modifying surface properties.

Application

• Industrial Water Treatment: Acts as a highly effective scale and corrosion inhibitor in cooling water, boiler water, and reverse osmosis systems.
• Chemical Synthesis Intermediate: Serves as a key building block for synthesizing metal-organic frameworks (MOFs), functional polymers, and advanced ligands.
• Detergent & Cleaning Formulations: Used as a chelating agent and builder to sequester hardness ions like calcium and magnesium, enhancing cleaning efficiency.
• Oilfield Chemicals: Applied in scale squeeze treatments and as a component in drilling fluids to prevent mineral scale formation in wells and pipelines.
• Textile & Paper Processing: Functions as a dispersant and sequestrant to control metal ions that can interfere with bleaching, dyeing, and pulp processing.
• Personal Care Products: Incorporated as a stabilizing and chelating agent in certain cosmetic and personal care formulations.

Basic Information

Product Name	p-Xylylenebisphosphonic Acid
CAS No.	4546-06-9
Molecular Formula	C8H12O6P2
Molecular Weight	266.13 g/mol
Synonyms	1,4-Phenylenebis(methylenephosphonic acid); p-Xylylenediphosphonic acid; PXDPA; (Phosphonomethyl)benzene-1,4-diylbis(methylphosphonic acid); 1,4-Bis(phosphonomethyl)benzene; Benzene-1,4-diylbis(methylphosphonic acid); PBMPA; Tetrasodium p-xylylenediphosphonate (derivative salt form)
EINECS	Contact for details

Quality Control

Our p-Xylylenebisphosphonic Acid is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure it meets precise specifications for purity, identity, and performance. A Certificate of Analysis (COA) documenting key parameters such as assay, impurity profile, and physical characteristics is provided with every shipment and is available upon request.

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 (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture, which can affect product quality.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 2.0%
pH (1% aqueous solution)	2.0 - 4.0
Heavy Metals (as Pb)	≤ 20 ppm

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