The CAS Registry Mumber 70485-58-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,0,4,8 and 5 respectively; the second part has 2 digits, 5 and 8 respectively. Calculate Digit Verification of CAS Registry Number 70485-58: (7*7)+(6*0)+(5*4)+(4*8)+(3*5)+(2*5)+(1*8)=134 134 % 10 = 4 So 70485-58-4 is a valid CAS Registry Number.
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