The CAS Registry Mumber 73407-88-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,3,4,0 and 7 respectively; the second part has 2 digits, 8 and 8 respectively. Calculate Digit Verification of CAS Registry Number 73407-88: (7*7)+(6*3)+(5*4)+(4*0)+(3*7)+(2*8)+(1*8)=132 132 % 10 = 2 So 73407-88-2 is a valid CAS Registry Number.
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