The CAS Registry Mumber 115722-83-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,5,7,2 and 2 respectively; the second part has 2 digits, 8 and 3 respectively. Calculate Digit Verification of CAS Registry Number 115722-83: (8*1)+(7*1)+(6*5)+(5*7)+(4*2)+(3*2)+(2*8)+(1*3)=113 113 % 10 = 3 So 115722-83-3 is a valid CAS Registry Number.
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