The CAS Registry Mumber 104780-67-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,4,7,8 and 0 respectively; the second part has 2 digits, 6 and 7 respectively. Calculate Digit Verification of CAS Registry Number 104780-67: (8*1)+(7*0)+(6*4)+(5*7)+(4*8)+(3*0)+(2*6)+(1*7)=118 118 % 10 = 8 So 104780-67-8 is a valid CAS Registry Number.
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