The CAS Registry Mumber 157201-96-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,7,2,0 and 1 respectively; the second part has 2 digits, 9 and 6 respectively. Calculate Digit Verification of CAS Registry Number 157201-96: (8*1)+(7*5)+(6*7)+(5*2)+(4*0)+(3*1)+(2*9)+(1*6)=122 122 % 10 = 2 So 157201-96-2 is a valid CAS Registry Number.
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