The CAS Registry Mumber 143552-06-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,3,5,5 and 2 respectively; the second part has 2 digits, 0 and 6 respectively. Calculate Digit Verification of CAS Registry Number 143552-06: (8*1)+(7*4)+(6*3)+(5*5)+(4*5)+(3*2)+(2*0)+(1*6)=111 111 % 10 = 1 So 143552-06-1 is a valid CAS Registry Number.
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