The CAS Registry Mumber 132651-90-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,2,6,5 and 1 respectively; the second part has 2 digits, 9 and 0 respectively. Calculate Digit Verification of CAS Registry Number 132651-90: (8*1)+(7*3)+(6*2)+(5*6)+(4*5)+(3*1)+(2*9)+(1*0)=112 112 % 10 = 2 So 132651-90-2 is a valid CAS Registry Number.
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