The CAS Registry Mumber 148988-35-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,8,9,8 and 8 respectively; the second part has 2 digits, 3 and 5 respectively. Calculate Digit Verification of CAS Registry Number 148988-35: (8*1)+(7*4)+(6*8)+(5*9)+(4*8)+(3*8)+(2*3)+(1*5)=196 196 % 10 = 6 So 148988-35-6 is a valid CAS Registry Number.
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