The CAS Registry Mumber 29499-22-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,9,4,9 and 9 respectively; the second part has 2 digits, 2 and 2 respectively. Calculate Digit Verification of CAS Registry Number 29499-22: (7*2)+(6*9)+(5*4)+(4*9)+(3*9)+(2*2)+(1*2)=157 157 % 10 = 7 So 29499-22-7 is a valid CAS Registry Number.
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