The CAS Registry Mumber 137435-76-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,7,4,3 and 5 respectively; the second part has 2 digits, 7 and 6 respectively. Calculate Digit Verification of CAS Registry Number 137435-76: (8*1)+(7*3)+(6*7)+(5*4)+(4*3)+(3*5)+(2*7)+(1*6)=138 138 % 10 = 8 So 137435-76-8 is a valid CAS Registry Number.
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