Description

Monothiono Tepp CAS NO 645-78-3 is a specialized organophosphorus compound with the CAS registry number 645-78-3. This chemical is valued for its role as a key intermediate and reagent in advanced chemical synthesis, particularly in the development of complex molecules. It is primarily sought by research institutions and industrial manufacturers in the agrochemical and pharmaceutical sectors for process development and fine chemical production.

Application

• Key intermediate in the synthesis of novel organophosphate agrochemicals and insecticides.
• Research reagent for developing pharmaceutical active ingredients and studying biochemical pathways.
• Precursor in the manufacture of specialized ligands and catalysts for metal-organic chemistry.
• Building block for flame retardants and polymer additives in material science applications.
• Used in analytical chemistry as a reference standard for method development and quality control.

Basic Information

Product Name	Monothiono Tepp
CAS No.	645-78-3
Molecular Formula	C8H20O5P2S
Molecular Weight	290.25 g/mol
Synonyms	Monothiopyrophosphate; O,O,O',O'-Tetraethyl monothiopyrophosphate; Tetraethyl monothiopyrophosphate; ENT 27,311; Monothiono TEPP; Phosphorothioic acid, tetraethyl ester, P-oxide; Thiono analogue of TEPP
EINECS	211-463-5

Quality Control

Our Monothiono Tepp is produced under strict quality management protocols to ensure batch-to-batch consistency and high purity. Each lot undergoes comprehensive analytical testing, including chromatographic purity assays and identity confirmation. A detailed Certificate of Analysis (COA) documenting all test results is provided with every shipment to support your quality assurance and regulatory compliance 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 after opening to prevent degradation. Keep away from strong alkalis and incompatible organic solvents.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 0.5%
Related Substances (HPLC)	Total impurities ≤ 5.0%
Specific Gravity (20°C)	1.150 - 1.180

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