The CAS Registry Mumber 1598-49-8 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,5,9 and 8 respectively; the second part has 2 digits, 4 and 9 respectively. Calculate Digit Verification of CAS Registry Number 1598-49: (6*1)+(5*5)+(4*9)+(3*8)+(2*4)+(1*9)=108 108 % 10 = 8 So 1598-49-8 is a valid CAS Registry Number.
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