The CAS Registry Mumber 2207-46-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,2,0 and 7 respectively; the second part has 2 digits, 4 and 6 respectively. Calculate Digit Verification of CAS Registry Number 2207-46: (6*2)+(5*2)+(4*0)+(3*7)+(2*4)+(1*6)=57 57 % 10 = 7 So 2207-46-7 is a valid CAS Registry Number.
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