The CAS Registry Mumber 210293-69-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,0,2,9 and 3 respectively; the second part has 2 digits, 6 and 9 respectively. Calculate Digit Verification of CAS Registry Number 210293-69: (8*2)+(7*1)+(6*0)+(5*2)+(4*9)+(3*3)+(2*6)+(1*9)=99 99 % 10 = 9 So 210293-69-9 is a valid CAS Registry Number.
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