The CAS Registry Mumber 80567-34-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,0,5,6 and 7 respectively; the second part has 2 digits, 3 and 4 respectively. Calculate Digit Verification of CAS Registry Number 80567-34: (7*8)+(6*0)+(5*5)+(4*6)+(3*7)+(2*3)+(1*4)=136 136 % 10 = 6 So 80567-34-6 is a valid CAS Registry Number.
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