The CAS Registry Mumber 920512-47-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 9,2,0,5,1 and 2 respectively; the second part has 2 digits, 4 and 7 respectively. Calculate Digit Verification of CAS Registry Number 920512-47: (8*9)+(7*2)+(6*0)+(5*5)+(4*1)+(3*2)+(2*4)+(1*7)=136 136 % 10 = 6 So 920512-47-6 is a valid CAS Registry Number.
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