The CAS Registry Mumber 18763-33-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,8,7,6 and 3 respectively; the second part has 2 digits, 3 and 3 respectively. Calculate Digit Verification of CAS Registry Number 18763-33: (7*1)+(6*8)+(5*7)+(4*6)+(3*3)+(2*3)+(1*3)=132 132 % 10 = 2 So 18763-33-2 is a valid CAS Registry Number.
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