The CAS Registry Mumber 105144-69-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,5,1,4 and 4 respectively; the second part has 2 digits, 6 and 9 respectively. Calculate Digit Verification of CAS Registry Number 105144-69: (8*1)+(7*0)+(6*5)+(5*1)+(4*4)+(3*4)+(2*6)+(1*9)=92 92 % 10 = 2 So 105144-69-2 is a valid CAS Registry Number.
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