The CAS Registry Mumber 130632-77-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,0,6,3 and 2 respectively; the second part has 2 digits, 7 and 7 respectively. Calculate Digit Verification of CAS Registry Number 130632-77: (8*1)+(7*3)+(6*0)+(5*6)+(4*3)+(3*2)+(2*7)+(1*7)=98 98 % 10 = 8 So 130632-77-8 is a valid CAS Registry Number.
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