The CAS Registry Mumber 808771-46-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,0,8,7,7 and 1 respectively; the second part has 2 digits, 4 and 6 respectively. Calculate Digit Verification of CAS Registry Number 808771-46: (8*8)+(7*0)+(6*8)+(5*7)+(4*7)+(3*1)+(2*4)+(1*6)=192 192 % 10 = 2 So 808771-46-2 is a valid CAS Registry Number.
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