The CAS Registry Mumber 154889-02-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,4,8,8 and 9 respectively; the second part has 2 digits, 0 and 2 respectively. Calculate Digit Verification of CAS Registry Number 154889-02: (8*1)+(7*5)+(6*4)+(5*8)+(4*8)+(3*9)+(2*0)+(1*2)=168 168 % 10 = 8 So 154889-02-8 is a valid CAS Registry Number.
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