The CAS Registry Mumber 158832-43-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,8,8,3 and 2 respectively; the second part has 2 digits, 4 and 3 respectively. Calculate Digit Verification of CAS Registry Number 158832-43: (8*1)+(7*5)+(6*8)+(5*8)+(4*3)+(3*2)+(2*4)+(1*3)=160 160 % 10 = 0 So 158832-43-0 is a valid CAS Registry Number.
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