The CAS Registry Mumber 121375-08-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,1,3,7 and 5 respectively; the second part has 2 digits, 0 and 8 respectively. Calculate Digit Verification of CAS Registry Number 121375-08: (8*1)+(7*2)+(6*1)+(5*3)+(4*7)+(3*5)+(2*0)+(1*8)=94 94 % 10 = 4 So 121375-08-4 is a valid CAS Registry Number.
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