The CAS Registry Mumber 34370-35-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,4,3,7 and 0 respectively; the second part has 2 digits, 3 and 5 respectively. Calculate Digit Verification of CAS Registry Number 34370-35: (7*3)+(6*4)+(5*3)+(4*7)+(3*0)+(2*3)+(1*5)=99 99 % 10 = 9 So 34370-35-9 is a valid CAS Registry Number.
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