The CAS Registry Mumber 152398-64-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,2,3,9 and 8 respectively; the second part has 2 digits, 6 and 4 respectively. Calculate Digit Verification of CAS Registry Number 152398-64: (8*1)+(7*5)+(6*2)+(5*3)+(4*9)+(3*8)+(2*6)+(1*4)=146 146 % 10 = 6 So 152398-64-6 is a valid CAS Registry Number.
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