The CAS Registry Mumber 76514-42-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,6,5,1 and 4 respectively; the second part has 2 digits, 4 and 2 respectively. Calculate Digit Verification of CAS Registry Number 76514-42: (7*7)+(6*6)+(5*5)+(4*1)+(3*4)+(2*4)+(1*2)=136 136 % 10 = 6 So 76514-42-6 is a valid CAS Registry Number.
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