The CAS Registry Mumber 153890-19-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,3,8,9 and 0 respectively; the second part has 2 digits, 1 and 9 respectively. Calculate Digit Verification of CAS Registry Number 153890-19: (8*1)+(7*5)+(6*3)+(5*8)+(4*9)+(3*0)+(2*1)+(1*9)=148 148 % 10 = 8 So 153890-19-8 is a valid CAS Registry Number.
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