Description

2-[Phosphonooxy]-2-Propenoic Acid Trisodium Salt Hydrate is a water-soluble organophosphorus compound that serves as a highly effective scale inhibitor and chelating agent. Its unique molecular structure, featuring both phosphonate and carboxylate functional groups, provides superior sequestration of metal ions like calcium and magnesium under demanding conditions. This product is essential for industrial water treatment, detergent formulation, and textile processing where control of hardness ions and prevention of inorganic deposits are critical for operational efficiency and product quality.

Application

• Industrial Water Treatment: Primary application as a high-performance antiscalant and dispersant in cooling water, boiler water, and reverse osmosis (RO) systems to prevent calcium carbonate, sulfate, and phosphate scales.
• Detergent & Cleaning Formulations: Acts as a builder and sequestrant in liquid and powder detergents, enhancing cleaning power by inactivating water hardness ions and improving surfactant efficacy.
• Textile Processing: Used in bleaching, dyeing, and finishing baths to sequester metal ions that can cause shade variation, fabric damage, or precipitate formation.
• Pulp & Paper Manufacturing: Employed in bleaching processes and as a dispersant to control scale in digesters and paper machines, improving pulp brightness and operational continuity.
• Oilfield Chemicals: Component in scale inhibitor formulations for squeeze treatments and production chemicals to control mineral scale in downhole and topside facilities.
• Personal Care Products: Chelating agent in shampoos, liquid soaps, and other formulations to stabilize products and improve performance in hard water.

Basic Information

Product Name	2-[Phosphonooxy]-2-Propenoic Acid Trisodium Salt Hydrate
CAS No.	5541-93-5
Molecular Formula	C3H2Na3O7P · xH2O
Molecular Weight	Anhydrous: 249.98 g/mol
Synonyms	Phosphonooxypropenoic Acid Trisodium Salt; Acrylic Acid, 2-(Phosphonooxy)-, Trisodium Salt, Hydrate; Trisodium 2-(Phosphonooxy)acrylate Hydrate; ATMP Na3 (Aminotris(methylenephosphonic acid) trisodium salt is a different compound); PBTC precursor (related to 2-Phosphonobutane-1,2,4-Tricarboxylic Acid); Water Treatment Scale Inhibitor Intermediate; Sodium Phosphonooxyacrylate Hydrate
EINECS	226-894-2

Quality Control

Our production of 2-[Phosphonooxy]-2-Propenoic Acid Trisodium Salt Hydrate adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. The product is manufactured under a quality system compliant with ISO 9001 standards. Each lot is subjected to comprehensive analytical testing, including assay by titration, identification by FT-IR, and quantification of key impurities. Certificates of Analysis (COA) detailing purity, physical properties, and test results are provided with every shipment and are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). This material is hygroscopic (moisture-sensitive). The original container must be kept tightly sealed after each use to minimize exposure to atmospheric moisture, which can lead to caking or reduced efficacy. Keep away from strong acids and strong oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder or granules
Identification (IR)	Conforms to reference spectrum
Assay (Titration)	≥ 95.0% (on anhydrous basis)
pH (1% Aqueous Solution)	9.0 - 11.0
Water Content (KF)	≤ 5.0%
Chloride (as Cl)	≤ 0.1%
Sulfate (as SO4)	≤ 0.5%

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