The CAS Registry Mumber 39448-90-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,9,4,4 and 8 respectively; the second part has 2 digits, 9 and 0 respectively. Calculate Digit Verification of CAS Registry Number 39448-90: (7*3)+(6*9)+(5*4)+(4*4)+(3*8)+(2*9)+(1*0)=153 153 % 10 = 3 So 39448-90-3 is a valid CAS Registry Number.
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