The CAS Registry Mumber 6290-04-6 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,2,9 and 0 respectively; the second part has 2 digits, 0 and 4 respectively. Calculate Digit Verification of CAS Registry Number 6290-04: (6*6)+(5*2)+(4*9)+(3*0)+(2*0)+(1*4)=86 86 % 10 = 6 So 6290-04-6 is a valid CAS Registry Number.
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