The CAS Registry Mumber 93964-22-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,3,9,6 and 4 respectively; the second part has 2 digits, 2 and 2 respectively. Calculate Digit Verification of CAS Registry Number 93964-22: (7*9)+(6*3)+(5*9)+(4*6)+(3*4)+(2*2)+(1*2)=168 168 % 10 = 8 So 93964-22-8 is a valid CAS Registry Number.
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