The CAS Registry Mumber 3622-45-5 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 3,6,2 and 2 respectively; the second part has 2 digits, 4 and 5 respectively. Calculate Digit Verification of CAS Registry Number 3622-45: (6*3)+(5*6)+(4*2)+(3*2)+(2*4)+(1*5)=75 75 % 10 = 5 So 3622-45-5 is a valid CAS Registry Number.
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