Description

Mono-(Trimethylsilyl)Phosphite CAS NO 91076-68-5 is a versatile organosilicon reagent primarily used as a key intermediate in the synthesis of complex organic and organophosphorus compounds. Its value lies in its ability to act as a highly effective silylating and phosphorylating agent, facilitating critical bond-forming reactions under mild conditions. This product is essential for research chemists and process development scientists in the pharmaceutical, agrochemical, and advanced materials industries who require reliable, high-purity building blocks for their synthetic workflows.

Application

• Pharmaceutical Intermediate: A crucial building block in the synthesis of novel active pharmaceutical ingredients (APIs), particularly those containing phosphorus or requiring silyl protection strategies.
• Agrochemical Synthesis: Used in the production of advanced pesticides, herbicides, and plant growth regulators where phosphorus-based chemistry is central to biological activity.
• Ligand and Catalyst Preparation: Serves as a precursor for the synthesis of specialized phosphite and phosphonite ligands used in homogeneous catalysis, such as asymmetric hydrogenation.
• Polymer Modification: Employed as a functionalizing agent to introduce phosphite groups into polymer backbones, enhancing properties like flame retardancy or adhesion.
• Silicon Chemistry Research: A fundamental reagent in organosilicon chemistry for studying silyl-phosphorus bond formation and reactivity.
• Electrolyte Additive: Investigated for use as a stabilizing additive in lithium-ion battery electrolytes to improve cycle life and safety.

Basic Information

Product Name	Mono-(Trimethylsilyl)Phosphite
CAS No.	91076-68-5
Molecular Formula	C3H11O3PSi
Molecular Weight	154.19 g/mol
Synonyms	Phosphorous Acid Mono(trimethylsilyl) Ester; Trimethylsilyl Phosphite; (Trimethylsilyloxy)phosphine Oxide; P-Hydroxy-P-(trimethylsiloxy)phosphine Oxide; Monotrimethylsilyl Phosphite; TMSP; H-Phosphonate Silyl Ester
EINECS	Contact for details

Quality Control

Our Mono-(Trimethylsilyl)Phosphite is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including NMR, GC, and HPLC, to ensure high chemical purity and consistency. We provide comprehensive Certificates of Analysis (COA) with every shipment, detailing all critical parameters. Our quality commitment ensures the material meets the stringent requirements for research and process development applications.

Storage

Preserve in a tightly closed container, protected from light. Store under an inert atmosphere (e.g., nitrogen or argon) in a cool, dry, and well-ventilated place. Recommended storage temperature is 2-8°C to maximize shelf life and minimize degradation due to its hygroscopic and oxidatively sensitive nature. Allow the container to reach room temperature before opening to prevent moisture condensation.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Purity (GC)	≥ 95.0%
Water Content (KF)	≤ 0.5%

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