The CAS Registry Mumber 69813-23-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,9,8,1 and 3 respectively; the second part has 2 digits, 2 and 3 respectively. Calculate Digit Verification of CAS Registry Number 69813-23: (7*6)+(6*9)+(5*8)+(4*1)+(3*3)+(2*2)+(1*3)=156 156 % 10 = 6 So 69813-23-6 is a valid CAS Registry Number.
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