Description

Tetraethyl Pyrophosphite is an organophosphorus compound with the CAS registry number 21646-99-1. This chemical serves as a versatile intermediate and reagent, valued for its role in synthesizing complex phosphorus-containing molecules. It is primarily sought after by manufacturers and R&D laboratories in the agrochemical, pharmaceutical, and specialty chemical sectors for the development of novel compounds and materials.

Application

• Agrochemical Intermediate: A key building block in the synthesis of organophosphate insecticides, herbicides, and plant growth regulators.
• Pharmaceutical Synthesis: Used as a phosphorylating agent and intermediate in the research and production of active pharmaceutical ingredients (APIs) and nucleotide analogs.
• Flame Retardant Production: Acts as a precursor in the manufacture of specialized phosphorus-based flame retardants for polymers and textiles.
• Ligand and Catalyst Preparation: Employed in the preparation of phosphite ligands for homogeneous catalysis and metal complexation.
• Polymer Modification: Utilized as a cross-linking agent or modifier to impart specific properties to specialty polymers and resins.
• Research & Development: Serves as a critical reagent in academic and industrial R&D for exploring new organophosphorus chemistry and material science.

Basic Information

Product Name	Tetraethyl Pyrophosphite
CAS No.	21646-99-1
Molecular Formula	C8H20O7P2
Molecular Weight	290.19 g/mol
Synonyms	TEPP (Pyrophosphite); Diphosphorous Acid, Tetraethyl Ester; Tetraethyl Diphosphite; Ethyl Pyrophosphite; Tetraethoxyphosphorane Oxide Dimer; Pyrophosphorous Acid Tetraethyl Ester; [(Ethoxy)phosphinyl]oxy-phosphinic Acid Diethyl Ester
EINECS	244-500-1

Quality Control

Our Tetraethyl Pyrophosphite is produced under stringent quality management systems. Each batch undergoes comprehensive analytical testing, including assay by titration and impurity profile analysis by gas chromatography (GC) or HPLC, to ensure it meets precise customer specifications and industry standards. A detailed Certificate of Analysis (COA) is provided with every shipment to guarantee traceability and compliance.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from heat sources and incompatible materials. Due to its sensitivity to moisture and potential for hydrolysis, it is recommended to handle and store under an inert atmosphere such as nitrogen for long-term stability. Recommended storage temperature is 2-8°C.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (GC/Titration)	≥ 95.0%
Water Content (KF)	≤ 0.5%
Specific Gravity (20°C)	1.10 - 1.20
Refractive Index (n20D)	1.420 - 1.440

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