The CAS Registry Mumber 609819-46-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,0,9,8,1 and 9 respectively; the second part has 2 digits, 4 and 6 respectively. Calculate Digit Verification of CAS Registry Number 609819-46: (8*6)+(7*0)+(6*9)+(5*8)+(4*1)+(3*9)+(2*4)+(1*6)=187 187 % 10 = 7 So 609819-46-7 is a valid CAS Registry Number.
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