38440-20-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 38440-20-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,8,4,4 and 0 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 38440-20:
(7*3)+(6*8)+(5*4)+(4*4)+(3*0)+(2*2)+(1*0)=109
109 % 10 = 9
So 38440-20-9 is a valid CAS Registry Number.
38440-20-9Relevant articles and documents
A Modified Synthesis of Fluorinated 1,3-Diketones
Joshi, Krishna C.,Joshi, Bidya S.
, p. 229 - 232 (2007/10/02)
The reinvestigation of acylation reactions of fluorinated aryl methylketones with ethyl esters at 0 deg C afforded fluorinated 1,3-diketones in excellent yields.
