Description

Methylenediphosphonic Acid Trisodium Salt is a high-purity, water-soluble organophosphonate compound. It serves as a highly effective chelating and scale inhibition agent, valued for its stability across a wide pH range. This product is essential for industrial water treatment, detergent formulations, and as a key intermediate in specialty chemical synthesis for the pharmaceutical and agrochemical sectors.

Application

• Industrial Water Treatment: Primary application as a scale and corrosion inhibitor in cooling towers, boilers, and reverse osmosis systems.
• Detergent & Cleaning Formulations: Acts as a builder and sequestrant to enhance cleaning power by controlling water hardness ions.
• Chemical Synthesis: Serves as a versatile intermediate or ligand in the production of pharmaceuticals, agrochemicals, and other organophosphorus compounds.
• Oilfield Chemicals: Used in scale squeeze treatments and as a component in drilling fluids to prevent mineral scale deposition.
• Pulp & Paper Industry: Employed in bleaching processes and as a chelant to control metal ions that can degrade pulp quality.
• Textile Processing: Functions as a stabilizer and sequestrant in peroxide bleaching baths and dyeing processes.
• Personal Care Products: Incorporated in formulations where chelation is required, such as in certain cosmetic stabilizers.

Basic Information

Product Name	Methylenediphosphonic Acid Trisodium Salt
CAS No.	39478-93-8
Molecular Formula	C H4 Na3 O7 P2
Molecular Weight	267.96 g/mol
Synonyms	MDP·Na3; MDP-Na3; Trisodium Methylenediphosphonate; (Phosphonomethyl)iminobis(methylenephosphonic acid) trisodium salt; Aminotris(methylenephosphonic acid) derivative; Dequest® 2006 (similar); 1-Hydroxyethylidene-1,1-diphosphonic acid trisodium salt (related compound); ATMP trisodium salt (common industry name for similar phosphonates)
EINECS	Contact for details

Quality Control

Our Methylenediphosphonic Acid Trisodium Salt 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, pH, and heavy metal content is provided with every shipment to guarantee traceability and consistency for your critical applications.

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 after initial use to prevent absorption of atmospheric moisture, which can lead to caking or reduced efficacy.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms
Assay (Titration)	≥ 95.0%
pH (1% Solution)	6.0 - 8.0
Water Content	≤ 5.0%
Heavy Metals (as Pb)	≤ 10 ppm
Chloride (Cl)	≤ 0.1%
Sulfate (SO4)	≤ 0.1%

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