The CAS Registry Mumber 82708-34-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,2,7,0 and 8 respectively; the second part has 2 digits, 3 and 4 respectively. Calculate Digit Verification of CAS Registry Number 82708-34: (7*8)+(6*2)+(5*7)+(4*0)+(3*8)+(2*3)+(1*4)=137 137 % 10 = 7 So 82708-34-7 is a valid CAS Registry Number.
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