940940-18-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 940940-18-1 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 8 respectively.
Calculate Digit Verification of CAS Registry Number 940940-18:
(8*9)+(7*4)+(6*0)+(5*9)+(4*4)+(3*0)+(2*1)+(1*8)=171
171 % 10 = 1
So 940940-18-1 is a valid CAS Registry Number.
940940-18-1Relevant academic research and scientific papers
METHOD FOR PRODUCING TETRAFLUOROTEREPHTHALIC ACID DIFLUORIDE
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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.
