940940-16-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 940940-16-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 9,4,0,9,4 and 0 respectively; the second part has 2 digits, 1 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 940940-16:
(8*9)+(7*4)+(6*0)+(5*9)+(4*4)+(3*0)+(2*1)+(1*6)=169
169 % 10 = 9
So 940940-16-9 is a valid CAS Registry Number.
940940-16-9Relevant academic research and scientific papers
METHOD FOR PRODUCING TETRAFLUOROTEREPHTHALIC ACID DIFLUORIDE
-
Page/Page column 7, (2008/12/08)
A method for producing tetrafluoroterephthalic acid difluoride comprising reacting tetrachloroterephthalic acid dichloride with potassium fluoride in the presence of dimethyl sulfone.
