The CAS Registry Mumber 9049-11-0 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 9,0,4 and 9 respectively; the second part has 2 digits, 1 and 1 respectively. Calculate Digit Verification of CAS Registry Number 9049-11: (6*9)+(5*0)+(4*4)+(3*9)+(2*1)+(1*1)=100 100 % 10 = 0 So 9049-11-0 is a valid CAS Registry Number.
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