Description

Trimethylene Borate is a specialized organoboron compound with the CAS number 20905-35-5, serving as a versatile chemical intermediate. Its value lies in its unique cyclic ester structure, which is highly reactive and useful for introducing boron-containing functional groups into more complex molecules. This product is essential for researchers and manufacturers in the pharmaceutical, agrochemical, and advanced materials sectors who require high-purity boron reagents for synthesis and development.

Application

• Pharmaceutical Intermediate: A key building block in the synthesis of novel boron-containing drug candidates, particularly for boron neutron capture therapy (BNCT) and protease inhibitors.
• Polymer & Material Science: Used as a monomer or cross-linking agent for creating boron-modified polymers, resins, and flame-retardant materials.
• Agrochemical Synthesis: Employed in the production of advanced herbicides, fungicides, and plant growth regulators that incorporate boron.
• Organic Synthesis Reagent: Acts as a protected form of boric acid or a transesterification agent in complex organic transformations and catalysis.
• Electrolyte Additive: Investigated for use in lithium-ion battery electrolytes to improve stability and performance at the electrode interface.
• Ceramic & Glass Precursor: Serves as a precursor for sol-gel processes to produce borosilicate glasses and advanced ceramic coatings.

Basic Information

Product Name	Trimethylene Borate
CAS No.	20905-35-5
Molecular Formula	C3H9BO3
Molecular Weight	103.91 g/mol
Synonyms	1,3,2-Dioxaborolane, 2-Methoxy-; 2-Methoxy-1,3,2-dioxaborolane; Trimethyl Borate (cyclic isomer); Boric Acid Trimethylene Ester; Cyclic Trimethylene Borate; 2-Methoxy-1,3,2-dioxaborinane; Propylene Borate
EINECS	Contact for details

Quality Control

Our Trimethylene Borate is produced under strict quality management systems to ensure batch-to-batch consistency and high purity. Each lot is analyzed using advanced techniques including GC, HPLC, and NMR to verify identity and assay. A comprehensive Certificate of Analysis (COA) detailing purity, impurity profile, and physical properties is provided with every shipment to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed under an inert atmosphere (e.g., nitrogen or argon) after opening to prevent degradation by atmospheric moisture.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 98.0%
Water Content (KF)	≤ 0.5%
Related Substances (GC)	Individual impurity ≤ 0.5%
Total Impurities	≤ 2.0%
Density (20°C)	~1.10 g/cm³

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