The CAS Registry Mumber 78330-30-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,8,3,3 and 0 respectively; the second part has 2 digits, 3 and 0 respectively. Calculate Digit Verification of CAS Registry Number 78330-30: (7*7)+(6*8)+(5*3)+(4*3)+(3*0)+(2*3)+(1*0)=130 130 % 10 = 0 So 78330-30-0 is a valid CAS Registry Number.
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