The CAS Registry Mumber 276692-05-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,7,6,6,9 and 2 respectively; the second part has 2 digits, 0 and 5 respectively. Calculate Digit Verification of CAS Registry Number 276692-05: (8*2)+(7*7)+(6*6)+(5*6)+(4*9)+(3*2)+(2*0)+(1*5)=178 178 % 10 = 8 So 276692-05-8 is a valid CAS Registry Number.
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