The CAS Registry Mumber 70343-36-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,0,3,4 and 3 respectively; the second part has 2 digits, 3 and 6 respectively. Calculate Digit Verification of CAS Registry Number 70343-36: (7*7)+(6*0)+(5*3)+(4*4)+(3*3)+(2*3)+(1*6)=101 101 % 10 = 1 So 70343-36-1 is a valid CAS Registry Number.
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