The CAS Registry Mumber 162152-41-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,2,1,5 and 2 respectively; the second part has 2 digits, 4 and 1 respectively. Calculate Digit Verification of CAS Registry Number 162152-41: (8*1)+(7*6)+(6*2)+(5*1)+(4*5)+(3*2)+(2*4)+(1*1)=102 102 % 10 = 2 So 162152-41-2 is a valid CAS Registry Number.
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