Description

Tetrakis(Hydroxymethyl)Phosphonium Dihydrogen Phosphate is a specialized organophosphorus compound that serves as a highly effective flame retardant and durable press finishing agent. Its unique chemical structure provides excellent thermal stability and cross-linking properties, making it a critical component for enhancing material safety and performance. This product is essential for manufacturers in the textile, polymer, and specialty chemical industries seeking to meet stringent fire safety and material durability standards.

Application

• Flame Retardant for Textiles: Primary application in imparting durable flame resistance to cotton, polyester, and blended fabrics for protective workwear, home furnishings, and industrial textiles.
• Durable Press (DP) Finishing Agent: Used as a key reactant in cross-linking formulations to provide wrinkle resistance, shape retention, and smooth-drying properties to cellulosic fabrics.
• Polymer Additive: Acts as a reactive flame retardant and stabilizer in specific polymer systems, including polyurethanes and certain thermosetting resins.
• Wood Treatment: Employed in formulations to provide fire retardancy to wood and wood composite materials.
• Paper and Packaging Treatment: Used to enhance the flame retardant properties of specialty papers and packaging materials.
• Adhesive and Coating Modifier: Incorporated into certain adhesive and coating formulations to improve fire performance and thermal stability.

Basic Information

Product Name	Tetrakis(Hydroxymethyl)Phosphonium Dihydrogen Phosphate
CAS No.	34762-86-2
Molecular Formula	C4H14O10P2
Molecular Weight	284.10 g/mol
Synonyms	THP Dihydrogen Phosphate; Tetrakis(hydroxymethyl)phosphonium phosphate (THPP); Phosphonium, tetrakis(hydroxymethyl)-, phosphate (1:1); THP Salt; THP-P; Flame Retardant THP Salt; Retardol C; Proban®-based phosphate salt; Tetrahydroxymethylphosphonium phosphate
EINECS	Contact for details

Quality Control

Our Tetrakis(Hydroxymethyl)Phosphonium Dihydrogen Phosphate is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure consistent purity, performance, and compliance with industry specifications for flame retardant applications. A comprehensive Certificate of Analysis (COA) detailing assay, pH, solubility, and other critical parameters is provided with every shipment to guarantee traceability and quality assurance.

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 material is hygroscopic (moisture-sensitive). Keep the container tightly sealed when not in use to prevent absorption of atmospheric moisture, which can affect product quality and performance.

Specification

Item	Specification
Appearance	Colorless to pale yellow viscous liquid or solid
Identification (IR)	Conforms
Assay (Titration)	≥ 65.0 % (as THP Salt)
pH (10% Solution)	1.5 - 3.0
Solubility in Water	Completely soluble
Phosphorus Content	Contact for details
Moisture (Karl Fischer)	≤ 5.0 %

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