The CAS Registry Mumber 40790-11-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,0,7,9 and 0 respectively; the second part has 2 digits, 1 and 1 respectively. Calculate Digit Verification of CAS Registry Number 40790-11: (7*4)+(6*0)+(5*7)+(4*9)+(3*0)+(2*1)+(1*1)=102 102 % 10 = 2 So 40790-11-2 is a valid CAS Registry Number.
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