The CAS Registry Mumber 105703-48-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,5,7,0 and 3 respectively; the second part has 2 digits, 4 and 8 respectively. Calculate Digit Verification of CAS Registry Number 105703-48: (8*1)+(7*0)+(6*5)+(5*7)+(4*0)+(3*3)+(2*4)+(1*8)=98 98 % 10 = 8 So 105703-48-8 is a valid CAS Registry Number.
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