The CAS Registry Mumber 1473-23-0 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,4,7 and 3 respectively; the second part has 2 digits, 2 and 3 respectively. Calculate Digit Verification of CAS Registry Number 1473-23: (6*1)+(5*4)+(4*7)+(3*3)+(2*2)+(1*3)=70 70 % 10 = 0 So 1473-23-0 is a valid CAS Registry Number.
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