The CAS Registry Mumber 352549-28-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,5,2,5,4 and 9 respectively; the second part has 2 digits, 2 and 8 respectively. Calculate Digit Verification of CAS Registry Number 352549-28: (8*3)+(7*5)+(6*2)+(5*5)+(4*4)+(3*9)+(2*2)+(1*8)=151 151 % 10 = 1 So 352549-28-1 is a valid CAS Registry Number.
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