The CAS Registry Mumber 206-52-0 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 2,0 and 6 respectively; the second part has 2 digits, 5 and 2 respectively. Calculate Digit Verification of CAS Registry Number 206-52: (5*2)+(4*0)+(3*6)+(2*5)+(1*2)=40 40 % 10 = 0 So 206-52-0 is a valid CAS Registry Number.
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