The CAS Registry Mumber 20485-07-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,4,8 and 5 respectively; the second part has 2 digits, 0 and 7 respectively. Calculate Digit Verification of CAS Registry Number 20485-07: (7*2)+(6*0)+(5*4)+(4*8)+(3*5)+(2*0)+(1*7)=88 88 % 10 = 8 So 20485-07-8 is a valid CAS Registry Number.
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