The CAS Registry Mumber 175448-22-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,5,4,4 and 8 respectively; the second part has 2 digits, 2 and 2 respectively. Calculate Digit Verification of CAS Registry Number 175448-22: (8*1)+(7*7)+(6*5)+(5*4)+(4*4)+(3*8)+(2*2)+(1*2)=153 153 % 10 = 3 So 175448-22-3 is a valid CAS Registry Number.
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