The CAS Registry Mumber 885519-65-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,8,5,5,1 and 9 respectively; the second part has 2 digits, 6 and 5 respectively. Calculate Digit Verification of CAS Registry Number 885519-65: (8*8)+(7*8)+(6*5)+(5*5)+(4*1)+(3*9)+(2*6)+(1*5)=223 223 % 10 = 3 So 885519-65-3 is a valid CAS Registry Number.
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