The CAS Registry Mumber 49748-76-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,9,7,4 and 8 respectively; the second part has 2 digits, 7 and 6 respectively. Calculate Digit Verification of CAS Registry Number 49748-76: (7*4)+(6*9)+(5*7)+(4*4)+(3*8)+(2*7)+(1*6)=177 177 % 10 = 7 So 49748-76-7 is a valid CAS Registry Number.
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