The CAS Registry Mumber 90083-47-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,0,0,8 and 3 respectively; the second part has 2 digits, 4 and 7 respectively. Calculate Digit Verification of CAS Registry Number 90083-47: (7*9)+(6*0)+(5*0)+(4*8)+(3*3)+(2*4)+(1*7)=119 119 % 10 = 9 So 90083-47-9 is a valid CAS Registry Number.
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