The CAS Registry Mumber 82290-78-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,2,2,9 and 0 respectively; the second part has 2 digits, 7 and 8 respectively. Calculate Digit Verification of CAS Registry Number 82290-78: (7*8)+(6*2)+(5*2)+(4*9)+(3*0)+(2*7)+(1*8)=136 136 % 10 = 6 So 82290-78-6 is a valid CAS Registry Number.
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