The CAS Registry Mumber 19529-40-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,9,5,2 and 9 respectively; the second part has 2 digits, 4 and 0 respectively. Calculate Digit Verification of CAS Registry Number 19529-40: (7*1)+(6*9)+(5*5)+(4*2)+(3*9)+(2*4)+(1*0)=129 129 % 10 = 9 So 19529-40-9 is a valid CAS Registry Number.
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