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Ethylphosphonic acid methylethyl ester, also known as EMPA, is an organophosphorus compound with the chemical formula C5H13O3P. It is a colorless liquid that is soluble in water and has a molecular weight of 150.13 g/mol. EMPA is a derivative of ethylphosphonic acid, where the hydroxyl group is replaced by a methylethyl group. Ethylphosphonic acid methylethyl ester is primarily used as a precursor in the synthesis of various organophosphorus compounds, such as pesticides and flame retardants. Due to its potential toxicity and environmental impact, the production and use of EMPA are subject to strict regulations.

5301-65-5

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5301-65-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 5301-65-5 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 5,3,0 and 1 respectively; the second part has 2 digits, 6 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 5301-65:
(6*5)+(5*3)+(4*0)+(3*1)+(2*6)+(1*5)=65
65 % 10 = 5
So 5301-65-5 is a valid CAS Registry Number.
InChI:InChI=1/C5H13O3P/c1-4-8-9(6,5-2)7-3/h4-5H2,1-3H3

5301-65-5Downstream Products

5301-65-5Relevant academic research and scientific papers

Reactivity of methoxide ion in concentrated methanolic solutions of Et4NOCH3 and Et4NCl

Savelova,Belousova,Simanenko,Popov

, p. 1790 - 1796 (2007/10/03)

Bimolecular rate constants k were determined for reactions of 4-nitrophenyl 4-toluenesulfonate, diethyl 4-nitrophenyl phosphate, and ethyl 4-nitrophenyl ethylphosphonate with tetraethylammonium methoxide Et4NOCH3 in methanol at 25°C over a wide range of Et4NOCH3 concentrations, where the reagent acts simultaneously as electrolyte, and at [Et4NOCH3] ≤ 0.1 M (reagent) with variation of Et4NCl (electrolyte) concentration. The relation logk = logk0 + b[Et4NX] is fulfilled up to [Et4NX] = 3.5 M, indicating that the electrolyte affects the reaction rate through restructurization of methanol as reaction medium.

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