Description

Tris(4-Isocyanatophenyl) Thiophosphate is a specialized aromatic polyisocyanate monomer containing a thiophosphate core. This compound is valued for its ability to introduce flame-retardant properties and enhanced thermal stability into high-performance polymer systems. It is primarily sought by manufacturers in the advanced materials sector for developing specialty polyurethanes, coatings, and adhesives where fire safety and material integrity are critical.

Application

• As a key reactive intermediate in the synthesis of flame-retardant polyurethane foams and elastomers.
• Incorporation into high-performance coatings and adhesives to improve fire resistance and thermal stability.
• Used in the production of specialized epoxy resin hardeners and cross-linking agents.
• As a modifier in advanced composite materials for aerospace and automotive applications.
• Research and development of novel polymeric materials with tailored mechanical and fire safety properties.
• Potential use in the formulation of specialty sealants and encapsulants for electronic components.

Basic Information

Product Name	Tris(4-Isocyanatophenyl) Thiophosphate
CAS No.	4151-51-3
Molecular Formula	C21H12N3O3PS
Molecular Weight	417.37 g/mol
Synonyms	Phosphorothioic Tris(4-isocyanatophenyl) Ester; Tris(p-isocyanatophenyl) Thiophosphate; Thiophosphoric Acid Tris(4-isocyanatophenyl) Ester; Desmodur® RFE (related class); Aromatic Triisocyanate; 4-Isocyanatophenyl Thiophosphate Trimer; Tris(4-isocyanatophenoxy) Thiophosphate
EINECS	223-984-8

Quality Control

Our production of Tris(4-Isocyanatophenyl) Thiophosphate adheres to stringent quality management protocols. Each batch is analyzed to ensure high purity and consistency, with key parameters monitored via advanced analytical techniques. Certificates of Analysis (COA) detailing purity, isocyanate content, and impurity profiles are provided to guarantee the material meets your specific application requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed under a dry inert atmosphere (e.g., nitrogen or argon) to prevent moisture ingress and degradation. Isocyanate-containing materials should be stored separately from moisture, acids, bases, and alcohols.

Specification

Item	Specification
Appearance	White to off-white crystalline powder or solid
Identification (IR)	Conforms to structure
Assay (NCO Content)	≥ 98.0%
Purity (HPLC)	≥ 97.0%
Melting Point	Contact for details
Hydrolyzable Chloride	≤ 0.1%
Moisture (Karl Fischer)	≤ 0.1%

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