The CAS Registry Mumber 1011533-78-0 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,0,1,1,5,3 and 3 respectively; the second part has 2 digits, 7 and 8 respectively. Calculate Digit Verification of CAS Registry Number 1011533-78: (9*1)+(8*0)+(7*1)+(6*1)+(5*5)+(4*3)+(3*3)+(2*7)+(1*8)=90 90 % 10 = 0 So 1011533-78-0 is a valid CAS Registry Number.
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