The CAS Registry Mumber 4719-11-3 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,7,1 and 9 respectively; the second part has 2 digits, 1 and 1 respectively. Calculate Digit Verification of CAS Registry Number 4719-11: (6*4)+(5*7)+(4*1)+(3*9)+(2*1)+(1*1)=93 93 % 10 = 3 So 4719-11-3 is a valid CAS Registry Number.
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