Description

3-Phosphonopentane-1,3,5-Tricarboxylic Acid CAS NO 4379-09-3 is a multifunctional organic phosphonic acid compound valued for its exceptional chelating and scale inhibition properties. Its unique molecular structure, featuring three carboxylic acid groups and a phosphonate group, makes it a highly effective sequestrant for polyvalent metal ions such as calcium, magnesium, and iron. This chemical is essential for formulators and process engineers in industries requiring advanced water treatment, high-performance cleaning, and mineral scale control. Its strong acidic nature and organic solvent compatibility allow for versatile formulation across a range of demanding industrial applications.

Application

• Industrial Water Treatment: Acts as a powerful scale and corrosion inhibitor in cooling towers, boilers, and reverse osmosis systems.
• Detergent & Cleaning Formulations: Serves as a superior builder and sequestrant in industrial and institutional cleaners, enhancing efficacy in hard water.
• Pulp & Paper Processing: Used as a chelating agent to control metal ions that can catalyze peroxide decomposition and affect pulp brightness.
• Textile Auxiliary: Functions as a stabilizer and sequestrant in bleaching, dyeing, and finishing baths to improve process consistency.
• Oilfield Chemicals: Employed in scale squeeze treatments and as a component in drilling fluid additives to prevent mineral deposition.
• Personal Care: May be used in specialized formulations as a chelating agent to stabilize products by binding trace metals.
• Metal Surface Treatment: Assists in cleaning and pickling formulations by chelating metal ions to prevent redeposition and improve surface quality.
• Agricultural Chemicals: Can be utilized as a stabilizer or compatibility agent in certain pesticide and fertilizer formulations.

Basic Information

Product Name	3-Phosphonopentane-1,3,5-Tricarboxylic Acid
CAS No.	4379-09-3
Molecular Formula	C8H13O11P
Molecular Weight	316.16 g/mol
Synonyms	3-Phosphonopentane-1,3,5-tricarboxylic acid; Phosphonobutane-1,2,4-tricarboxylic acid (PBTC); 2-Phosphonobutane-1,2,4-tricarboxylic acid; PBTC; 1,2,4-Butanetricarboxylic acid, 2-phosphono-; Dequest 7000; Bayhibit AM; Aquacid-108 EX
EINECS	224-506-8

Quality Control

Our 3-Phosphonopentane-1,3,5-Tricarboxylic Acid is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise specifications for identity, purity, and performance. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical parameters is provided with every shipment. Our production adheres to relevant industry standards, and we support our global customers with documentation for regulatory compliance, including REACH.

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); containers must be kept tightly sealed after opening to prevent absorption of atmospheric moisture, which can lead to caking or reduced efficacy. Keep away from strong bases and incompatible materials.

Specification

Item	Specification
Appearance	Colorless to pale yellow viscous liquid or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 50.0% (as aqueous solution, typical) / ≥ 95.0% (solid, typical)
pH (1% aqueous solution)	1.5 - 2.5
Density (20°C)	1.25 - 1.35 g/cm³ (for liquid grades)
Phosphorus (P) Content	9.5 - 10.5 %
Iron (Fe)	≤ 10 ppm
Chloride (Cl)	≤ 50 ppm

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