Description

Diethyl Phosphite is a versatile organophosphorus compound primarily used as a key intermediate in the synthesis of various agrochemicals, pharmaceuticals, and flame retardants. Its significance lies in its role as a phosphorylating agent and a precursor for other valuable phosphonates and phosphates, enabling the production of high-performance materials and active ingredients. This product is essential for manufacturers and R&D teams in the agrochemical, pharmaceutical, and specialty chemical industries seeking reliable, high-purity intermediates for their synthesis processes.

Application

• Agrochemical Intermediate: A crucial building block for the synthesis of organophosphate pesticides, herbicides, and plant growth regulators.
• Pharmaceutical Synthesis: Used as a reagent in the production of certain pharmaceutical compounds and prodrugs.
• Flame Retardant Precursor: Serves as a starting material in the manufacture of phosphorus-based flame retardants for polymers and textiles.
• Lubricant & Fuel Additive: Employed in the formulation of extreme-pressure lubricant additives and stabilizers for fuels.
• Plasticizer & Stabilizer: Acts as an intermediate for plasticizers and stabilizers used in PVC and other plastic formulations.
• Chemical Synthesis Reagent: Utilized as a phosphorylating agent and reducing agent in various organic synthesis reactions.
• Corrosion Inhibitor: A component in formulations designed to prevent corrosion in industrial systems.
• Solvent & Extraction Agent: Finds use as a specialty solvent and in metal extraction processes.

Basic Information

Product Name	Diethyl Phosphite
CAS No.	762-04-9
Molecular Formula	C4H11O3P
Molecular Weight	138.10 g/mol
Synonyms	Diethyl phosphonate; Phosphonic acid, diethyl ester; Diethoxyphosphine oxide; DEP; Diethyl hydrogen phosphite; O,O-Diethyl phosphonate; Ethyl phosphite; Diethyl phosphorous acid
EINECS	212-091-7

Quality Control

Our Diethyl Phosphite is manufactured under strict quality management systems to ensure batch-to-batch consistency and high purity. We provide comprehensive Certificates of Analysis (COA) for every shipment, detailing key parameters such as assay, identity, and impurity profiles. Our quality commitment aligns with ISO standards, and we support compliance with global regulatory frameworks including REACH. Specifications can be tailored to meet specific customer requirements for industrial or technical grade applications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); containers must be kept tightly sealed to prevent contact with atmospheric moisture, which can lead to decomposition. Keep away from heat, sparks, and open flame. Store away from strong oxidizing agents and strong bases.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (GC)	≥ 98.0%
Water Content (KF)	≤ 0.5%
Refractive Index (n20D)	1.408 - 1.412
Density (20°C)	1.070 - 1.080 g/mL
Acidity (as H3PO4)	≤ 0.5%

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