The CAS Registry Mumber 378198-00-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,7,8,1,9 and 8 respectively; the second part has 2 digits, 0 and 0 respectively. Calculate Digit Verification of CAS Registry Number 378198-00: (8*3)+(7*7)+(6*8)+(5*1)+(4*9)+(3*8)+(2*0)+(1*0)=186 186 % 10 = 6 So 378198-00-6 is a valid CAS Registry Number.
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