The CAS Registry Mumber 2062663-68-5 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 2,0,6,2,6,6 and 3 respectively; the second part has 2 digits, 6 and 8 respectively. Calculate Digit Verification of CAS Registry Number 2062663-68: (9*2)+(8*0)+(7*6)+(6*2)+(5*6)+(4*6)+(3*3)+(2*6)+(1*8)=155 155 % 10 = 5 So 2062663-68-5 is a valid CAS Registry Number.
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