The CAS Registry Mumber 157348-58-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,7,3,4 and 8 respectively; the second part has 2 digits, 5 and 8 respectively. Calculate Digit Verification of CAS Registry Number 157348-58: (8*1)+(7*5)+(6*7)+(5*3)+(4*4)+(3*8)+(2*5)+(1*8)=158 158 % 10 = 8 So 157348-58-8 is a valid CAS Registry Number.
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