The CAS Registry Mumber 443642-48-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,4,3,6,4 and 2 respectively; the second part has 2 digits, 4 and 8 respectively. Calculate Digit Verification of CAS Registry Number 443642-48: (8*4)+(7*4)+(6*3)+(5*6)+(4*4)+(3*2)+(2*4)+(1*8)=146 146 % 10 = 6 So 443642-48-6 is a valid CAS Registry Number.
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