The CAS Registry Mumber 51884-92-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,1,8,8 and 4 respectively; the second part has 2 digits, 9 and 2 respectively. Calculate Digit Verification of CAS Registry Number 51884-92: (7*5)+(6*1)+(5*8)+(4*8)+(3*4)+(2*9)+(1*2)=145 145 % 10 = 5 So 51884-92-5 is a valid CAS Registry Number.
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