Description

Trimethyl Phosphite is a versatile organophosphorus compound widely used as a key intermediate in the synthesis of various agrochemicals, flame retardants, and pharmaceuticals. Its primary value lies in its role as a phosphorylating and reducing agent, facilitating critical reactions in industrial-scale manufacturing. This product is essential for producers in the agrochemical, polymer additives, and fine chemical synthesis sectors who require a reliable and high-purity phosphite source.

Application

• Agrochemical Intermediate: A crucial building block for synthesizing organophosphate insecticides, herbicides, and fungicides.
• Flame Retardant Production: Used in the manufacture of phosphonate-based flame retardants for plastics, textiles, and construction materials.
• Pharmaceutical Synthesis: Serves as a reagent in the production of certain antiviral drugs and other active pharmaceutical ingredients (APIs).
• Polymer Stabilizer Precursor: An intermediate for producing antioxidants and stabilizers that protect polymers from thermal and oxidative degradation.
• Lubricant & Fuel Additive: Employed in the synthesis of additives that improve the performance and stability of lubricants and fuels.
• Chemical Synthesis: Acts as a versatile reagent for organic transformations, including the Arbuzov and Michaelis–Arbuzov reactions.

Basic Information

Product Name	Trimethyl Phosphite
CAS No.	121-45-9
Molecular Formula	C3H9O3P
Molecular Weight	124.08 g/mol
Synonyms	Phosphorous Acid Trimethyl Ester; Methyl Phosphite; Trimethoxyphosphine; TMP; Phosphorous Acid Trimethyl Ester; Trimethyl Phosphonate (common misnomer); P(OCH3)3; TMPhite
EINECS	204-471-5

Quality Control

Our Trimethyl Phosphite is manufactured under a stringent quality management system to ensure batch-to-batch consistency and high purity. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing key parameters such as assay, moisture content, and specific impurity profiles. Our quality commitment aligns with industrial best practices and relevant chemical standards to support your production needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from heat and incompatible materials. Due to its hygroscopic (moisture-sensitive) nature, containers must be kept tightly sealed to prevent degradation from atmospheric moisture. Recommended storage temperature is 15-25°C.

Specification

Item	Specification
Appearance	Colorless clear liquid
Identification (IR)	Conforms
Assay (GC)	≥ 98.0%
Water Content (Karl Fischer)	≤ 0.5%
Density at 20°C	1.050 - 1.055 g/cm³
Refractive Index (n20D)	1.408 - 1.412
Boiling Point	111 - 112°C

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