Description

Tetrakis(Hydroxymethyl)Phosphonium Sulfate is a versatile organophosphorus compound primarily supplied as an aqueous solution. This chemical matters for its role as a highly effective precursor and reactive intermediate in industrial synthesis and finishing processes. It is needed by manufacturers in the textile, polymer, and specialty chemical industries for applications ranging from flame retardancy to biocidal treatments.

Application

• Flame Retardant for Textiles and Polymers: Acts as a key intermediate in the production of durable flame-retardant finishes for cotton, polyester, and other fabrics.
• Biocidal Agent: Used in the formulation of antimicrobial and antifungal treatments for industrial water systems, leather, and paper products.
• Crosslinking Agent: Serves as a reactive crosslinker in the synthesis of thermosetting resins and coatings, enhancing durability and chemical resistance.
• Paper and Pulp Industry: Employed to improve wet-strength and dry-strength properties of paper products.
• Oilfield Chemicals: Utilized as a component in drilling mud additives and scale inhibitors.
• Rubber and Latex Processing: Functions as a stabilizer and vulcanization agent in certain synthetic rubber formulations.

Basic Information

Product Name	Tetrakis(Hydroxymethyl)Phosphonium Sulfate
CAS No.	55566-30-8
Molecular Formula	C4H12O4P+ · ½ SO42- or [(HOCH2)4P]2SO4
Molecular Weight	406.26 g/mol (for bis-THPS sulfate)
Synonyms	THPS; Tetrakis(hydroxymethyl)phosphonium sulfate (50% solution); Phosphonium, tetrakis(hydroxymethyl)-, sulfate (2:1); Bis[tetrakis(hydroxymethyl)phosphonium] sulfate; THPS 75%; (Hydroxymethyl)phosphonium sulfate; Tetrahydroxymethylphosphonium sulfate; Flame Retardant THPS
EINECS	Contact for details

Quality Control

Our Tetrakis(Hydroxymethyl)Phosphonium Sulfate is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure consistency and compliance with agreed specifications. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with each shipment to guarantee traceability and product integrity.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive) and should be kept away from strong oxidizing agents, strong acids, and strong bases.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow aqueous solution
Assay (as THPS)	≥ 75% w/w (typical)
pH (as supplied)	2.0 - 4.0
Specific Gravity (20°C)	1.30 - 1.40
Water Content	Balance
Identification (IR)	Conforms

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