The CAS Registry Mumber 1984776-40-0 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,9,8,4,7,7 and 6 respectively; the second part has 2 digits, 4 and 0 respectively. Calculate Digit Verification of CAS Registry Number 1984776-40: (9*1)+(8*9)+(7*8)+(6*4)+(5*7)+(4*7)+(3*6)+(2*4)+(1*0)=250 250 % 10 = 0 So 1984776-40-0 is a valid CAS Registry Number.
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