The CAS Registry Mumber 90265-03-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,0,2,6 and 5 respectively; the second part has 2 digits, 0 and 3 respectively. Calculate Digit Verification of CAS Registry Number 90265-03: (7*9)+(6*0)+(5*2)+(4*6)+(3*5)+(2*0)+(1*3)=115 115 % 10 = 5 So 90265-03-5 is a valid CAS Registry Number.
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