The CAS Registry Mumber 1820619-84-8 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,8,2,0,6,1 and 9 respectively; the second part has 2 digits, 8 and 4 respectively. Calculate Digit Verification of CAS Registry Number 1820619-84: (9*1)+(8*8)+(7*2)+(6*0)+(5*6)+(4*1)+(3*9)+(2*8)+(1*4)=168 168 % 10 = 8 So 1820619-84-8 is a valid CAS Registry Number.
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