The CAS Registry Mumber 887833-47-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,8,7,8,3 and 3 respectively; the second part has 2 digits, 4 and 7 respectively. Calculate Digit Verification of CAS Registry Number 887833-47: (8*8)+(7*8)+(6*7)+(5*8)+(4*3)+(3*3)+(2*4)+(1*7)=238 238 % 10 = 8 So 887833-47-8 is a valid CAS Registry Number.
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