The CAS Registry Mumber 68130-72-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,8,1,3 and 0 respectively; the second part has 2 digits, 7 and 2 respectively. Calculate Digit Verification of CAS Registry Number 68130-72: (7*6)+(6*8)+(5*1)+(4*3)+(3*0)+(2*7)+(1*2)=123 123 % 10 = 3 So 68130-72-3 is a valid CAS Registry Number.
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