Description

2-Phosphonobutane-1,2,4-Tricarboxylic Acid, Ammonium Salt is a high-performance, nitrogen-free phosphonate scale and corrosion inhibitor. This compound is valued for its exceptional stability across a wide pH range and its superior threshold inhibition properties, preventing scale formation at substoichiometric concentrations. It is a critical component for industrial water treatment, particularly in cooling and boiler systems, and is also utilized in detergent formulations and as a dispersant in various process industries.

Application

• Industrial Water Treatment: Primary application as a highly effective scale and corrosion inhibitor in recirculating cooling water systems, boiler water, and desalination plants.
• Detergent & Cleaning Formulations: Acts as a builder and sequestrant, enhancing cleaning power by inactivating water hardness ions (calcium, magnesium) and preventing scale on equipment.
• Pulp & Paper Industry: Used as a dispersant and chelating agent in bleaching processes and to control scale in paper mill water circuits.
• Textile Processing: Employed as a stabilizer and sequestrant in dyeing and bleaching baths to improve process consistency and fabric quality.
• Oilfield Applications: Functions as a scale inhibitor in squeeze treatments and production systems to prevent mineral scale deposition in wells and pipelines.
• Metal Surface Treatment: Used in cleaning and pickling formulations to control metal ion precipitation and improve surface finish.

Basic Information

Item	Details
Product Name	2-Phosphonobutane-1,2,4-Tricarboxylic Acid, Ammonium Salt
CAS No.	70233-62-4
Molecular Formula	C7H17N3O9P (for the triammonium salt)
Molecular Weight	318.20 g/mol (for the triammonium salt)
Synonyms	PBTC, Ammonium Salt; Phosphonobutane Tricarboxylic Acid, Ammonium Salt; 2-Phosphono-1,2,4-butanetricarboxylic Acid Ammonium Salt; PBTC-NH4; Bayhibit AM; Dequest 7000 (related); Water Treatment Scale Inhibitor PBTC; 1,2,4-Butanetricarboxylic acid, 2-phosphono-, ammonium salt
EINECS	Contact for details

Quality Control

Our 2-Phosphonobutane-1,2,4-Tricarboxylic Acid, Ammonium Salt is manufactured under a strict quality management system. Every batch is analyzed to ensure it meets precise specifications for active content, pH, and impurity profiles. Certificates of Analysis (COA) documenting purity, identity, and key physical-chemical parameters are available upon request to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive). Keep the container tightly sealed when not in use to prevent absorption of atmospheric moisture, which may lead to caking or reduced efficacy.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Active Content (as PBTC acid)	≥ 50.0 %
pH (1% aqueous solution)	6.0 - 8.0
Density (20°C)	1.30 - 1.40 g/cm³
Orthophosphate (as PO43-)	≤ 0.5 %
Iron (Fe)	≤ 10 mg/kg

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