Description

Phosphorous Acid 3-(Trimethylsilyl)Propyl Ester is a specialized organosilicon compound that serves as a versatile intermediate and functional additive. Its unique structure, combining a phosphite moiety with a silyl-protected alkyl chain, makes it valuable for modifying material properties and facilitating specific synthetic pathways. This product is primarily utilized by researchers and manufacturers in the pharmaceutical, agrochemical, and advanced materials sectors for applications requiring moisture scavenging, stabilization, or surface modification.

Application

• Pharmaceutical Intermediate: Used in the synthesis of active pharmaceutical ingredients (APIs) and prodrugs, particularly where phosphonate or phosphate ester functionalities are required.
• Polymer Stabilizer & Modifier: Acts as an antioxidant and processing stabilizer for polymers like polyolefins and polycarbonates, and can be used to introduce functional groups for further cross-linking.
• Agrochemical Synthesis: Serves as a key building block in the production of certain herbicides, fungicides, and plant growth regulators.
• Surface Coupling Agent: Functions as an adhesion promoter or surface modifier for inorganic materials (e.g., glass, silica) in composite materials and coatings.
• Moisture Scavenger: Employed in moisture-sensitive formulations and reaction systems, such as polyurethane or silicone sealants, to prevent hydrolysis and extend shelf life.
• Catalyst & Ligand Precursor: Utilized in organometallic chemistry and catalysis as a precursor for phosphite ligands in transition metal-catalyzed reactions.

Basic Information

Product Name	Phosphorous Acid 3-(Trimethylsilyl)Propyl Ester
CAS No.	66368-62-5
Molecular Formula	C9H23O3PSi
Molecular Weight	238.34 g/mol
Synonyms	3-(Trimethylsilyl)propyl Phosphite; (3-Trimethylsilylpropyl) Phosphite; Phosphorous Acid Tris(3-(Trimethylsilyl)propyl) Ester; Tris(3-(trimethylsilyl)propyl) Phosphite; 3-(Trimethylsilyl)-1-propanol Phosphite (3:1); Silaplane P-3; Silylated Propyl Phosphite
EINECS	Contact for details

Quality Control

Our production of Phosphorous Acid 3-(Trimethylsilyl)Propyl Ester adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including GC, NMR, and titration methods, to verify identity, purity, and consistency. We provide a detailed Certificate of Analysis (COA) with each shipment, ensuring full traceability and compliance with your technical requirements.

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 compound is hygroscopic (moisture-sensitive); containers must be kept tightly sealed and under an inert atmosphere (e.g., nitrogen or argon) after opening to prevent degradation.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 95.0%
Water Content (KF)	≤ 0.5%
Refractive Index (n20D)	1.430 - 1.440
Density (g/mL, 20°C)	0.95 - 1.00

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