The CAS Registry Mumber 152425-19-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,2,4,2 and 5 respectively; the second part has 2 digits, 1 and 9 respectively. Calculate Digit Verification of CAS Registry Number 152425-19: (8*1)+(7*5)+(6*2)+(5*4)+(4*2)+(3*5)+(2*1)+(1*9)=109 109 % 10 = 9 So 152425-19-9 is a valid CAS Registry Number.
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