The CAS Registry Mumber 429621-48-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,2,9,6,2 and 1 respectively; the second part has 2 digits, 4 and 8 respectively. Calculate Digit Verification of CAS Registry Number 429621-48: (8*4)+(7*2)+(6*9)+(5*6)+(4*2)+(3*1)+(2*4)+(1*8)=157 157 % 10 = 7 So 429621-48-7 is a valid CAS Registry Number.
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