The CAS Registry Mumber 2415-36-3 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,4,1 and 5 respectively; the second part has 2 digits, 3 and 6 respectively. Calculate Digit Verification of CAS Registry Number 2415-36: (6*2)+(5*4)+(4*1)+(3*5)+(2*3)+(1*6)=63 63 % 10 = 3 So 2415-36-3 is a valid CAS Registry Number.
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