220734-54-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 220734-54-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,0,7,3 and 4 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 220734-54:
(8*2)+(7*2)+(6*0)+(5*7)+(4*3)+(3*4)+(2*5)+(1*4)=103
103 % 10 = 3
So 220734-54-3 is a valid CAS Registry Number.
220734-54-3Relevant academic research and scientific papers
Regioselectiv O-alkylation of ascorbic acid for the of efficient synthesis if antioxidants
Beifuss, Uwe
, p. 147 - 149 (2007/10/03)
The first chemo- and regioselective alkylation of ascorbic acid without protection of the hydroxyl groups at C-5 and C-6 exclusively yields the corresponding 3-O-ethers which can be used to synthesize the 2,3-O,O-diethers as well as the 2-0-alkyl ethers o
