Description

Carbonic Acid Bis(Trimethylsilyl) Ester (CAS NO 39981-89-0) is a highly reactive organosilicon reagent primarily used as a silylating agent and a versatile synthetic building block. Its core value lies in its ability to introduce the trimethylsilyl (TMS) protecting group, facilitating complex organic synthesis and derivatization for analysis. This compound is essential for researchers and manufacturers in the pharmaceutical, agrochemical, and advanced materials sectors. Its properties make it a critical intermediate for producing silicon-containing compounds and protecting sensitive functional groups during multi-step reactions.

Application

• Silylating Agent: Used to protect hydroxyl (-OH) and other labile functional groups in organic synthesis, particularly in the production of pharmaceuticals and natural products.
• Chemical Intermediate: Serves as a key precursor in the synthesis of more complex organosilicon compounds, including silicones and specialty polymers.
• Derivatization Reagent: Employed in analytical chemistry (e.g., GC-MS) to increase the volatility and thermal stability of polar compounds for improved detection.
• Polymer Chemistry: Utilized in the modification of polymer surfaces and the synthesis of novel polymeric materials with specific surface properties.
• Electronics & Semiconductor Industry: Acts as a source for silicon in chemical vapor deposition (CVD) processes for thin-film coatings.
• Agrochemical Synthesis: Used in the multi-step synthesis of advanced active ingredients and intermediates.

Basic Information

Product Name	Carbonic Acid Bis(Trimethylsilyl) Ester
CAS No.	39981-89-0
Molecular Formula	C7H18O3Si2
Molecular Weight	206.39 g/mol
Synonyms	Bis(trimethylsilyl) Carbonate; Carbonyl Bis(oxytrimethylsilane); Trimethylsilyl Carbonate; Hexamethyldisiloxane, Carbonate Derivative; O,O'-Bis(trimethylsilyl) Carbonate; TMS Carbonate; BTC; BSC
EINECS	Contact for details

Quality Control

Our Carbonic Acid Bis(Trimethylsilyl) Ester is manufactured under strict quality control protocols to ensure high purity and batch-to-batch consistency. We employ advanced analytical techniques including GC, HPLC, and NMR to verify identity and purity. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical properties is provided with each shipment. Our quality system is designed to meet the stringent requirements of research and industrial-scale applications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at a recommended temperature of 2-8°C (refrigerated) or as specified on the label. Due to its hygroscopic and highly volatile nature, containers must be kept tightly sealed under an inert atmosphere (e.g., nitrogen or argon) after opening to prevent moisture absorption and decomposition. Keep away from heat, sparks, and open flames.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 98.0%
Water Content (KF)	≤ 0.5%
Density (at 20°C)	~0.95 g/mL
Refractive Index (n20D)	~1.405

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