The CAS Registry Mumber 304646-76-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,0,4,6,4 and 6 respectively; the second part has 2 digits, 7 and 6 respectively. Calculate Digit Verification of CAS Registry Number 304646-76: (8*3)+(7*0)+(6*4)+(5*6)+(4*4)+(3*6)+(2*7)+(1*6)=132 132 % 10 = 2 So 304646-76-2 is a valid CAS Registry Number.
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