The CAS Registry Mumber 690229-03-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,9,0,2,2 and 9 respectively; the second part has 2 digits, 0 and 3 respectively. Calculate Digit Verification of CAS Registry Number 690229-03: (8*6)+(7*9)+(6*0)+(5*2)+(4*2)+(3*9)+(2*0)+(1*3)=159 159 % 10 = 9 So 690229-03-9 is a valid CAS Registry Number.
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