The CAS Registry Mumber 69320-16-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,9,3,2 and 0 respectively; the second part has 2 digits, 1 and 6 respectively. Calculate Digit Verification of CAS Registry Number 69320-16: (7*6)+(6*9)+(5*3)+(4*2)+(3*0)+(2*1)+(1*6)=127 127 % 10 = 7 So 69320-16-7 is a valid CAS Registry Number.
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