The CAS Registry Mumber 70275-63-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,0,2,7 and 5 respectively; the second part has 2 digits, 6 and 3 respectively. Calculate Digit Verification of CAS Registry Number 70275-63: (7*7)+(6*0)+(5*2)+(4*7)+(3*5)+(2*6)+(1*3)=117 117 % 10 = 7 So 70275-63-7 is a valid CAS Registry Number.
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