The CAS Registry Mumber 107515-00-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,7,5,1 and 5 respectively; the second part has 2 digits, 0 and 0 respectively. Calculate Digit Verification of CAS Registry Number 107515-00: (8*1)+(7*0)+(6*7)+(5*5)+(4*1)+(3*5)+(2*0)+(1*0)=94 94 % 10 = 4 So 107515-00-4 is a valid CAS Registry Number.
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