The CAS Registry Mumber 335248-50-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,3,5,2,4 and 8 respectively; the second part has 2 digits, 5 and 0 respectively. Calculate Digit Verification of CAS Registry Number 335248-50: (8*3)+(7*3)+(6*5)+(5*2)+(4*4)+(3*8)+(2*5)+(1*0)=135 135 % 10 = 5 So 335248-50-5 is a valid CAS Registry Number.
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