The CAS Registry Mumber 39932-40-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,9,9,3 and 2 respectively; the second part has 2 digits, 4 and 0 respectively. Calculate Digit Verification of CAS Registry Number 39932-40: (7*3)+(6*9)+(5*9)+(4*3)+(3*2)+(2*4)+(1*0)=146 146 % 10 = 6 So 39932-40-6 is a valid CAS Registry Number.
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