145122-40-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 145122-40-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,5,1,2 and 2 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 145122-40:
(8*1)+(7*4)+(6*5)+(5*1)+(4*2)+(3*2)+(2*4)+(1*0)=93
93 % 10 = 3
So 145122-40-3 is a valid CAS Registry Number.
145122-40-3Relevant articles and documents
Preparing method of 5,6-dihydro-2H-pyran-2-one
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Paragraph 0024; 0026, (2019/10/02)
The invention relates to a new synthesis route of 5,6-dihydro-2H-pyran-2-one. 3-(benzyloxy)propionic acid is taken as a raw material, and through four steps of a chlorination reaction, a condensationreaction, a cyclization reduction reaction and an elimin