The CAS Registry Mumber 73049-70-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,3,0,4 and 9 respectively; the second part has 2 digits, 7 and 0 respectively. Calculate Digit Verification of CAS Registry Number 73049-70: (7*7)+(6*3)+(5*0)+(4*4)+(3*9)+(2*7)+(1*0)=124 124 % 10 = 4 So 73049-70-4 is a valid CAS Registry Number.
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