The CAS Registry Mumber 155076-28-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,5,0,7 and 6 respectively; the second part has 2 digits, 2 and 8 respectively. Calculate Digit Verification of CAS Registry Number 155076-28: (8*1)+(7*5)+(6*5)+(5*0)+(4*7)+(3*6)+(2*2)+(1*8)=131 131 % 10 = 1 So 155076-28-1 is a valid CAS Registry Number.
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