The CAS Registry Mumber 65454-33-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,5,4,5 and 4 respectively; the second part has 2 digits, 3 and 3 respectively. Calculate Digit Verification of CAS Registry Number 65454-33: (7*6)+(6*5)+(5*4)+(4*5)+(3*4)+(2*3)+(1*3)=133 133 % 10 = 3 So 65454-33-3 is a valid CAS Registry Number.
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