The CAS Registry Mumber 119039-87-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,9,0,3 and 9 respectively; the second part has 2 digits, 8 and 7 respectively. Calculate Digit Verification of CAS Registry Number 119039-87: (8*1)+(7*1)+(6*9)+(5*0)+(4*3)+(3*9)+(2*8)+(1*7)=131 131 % 10 = 1 So 119039-87-1 is a valid CAS Registry Number.
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