The CAS Registry Mumber 57951-41-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,7,9,5 and 1 respectively; the second part has 2 digits, 4 and 1 respectively. Calculate Digit Verification of CAS Registry Number 57951-41: (7*5)+(6*7)+(5*9)+(4*5)+(3*1)+(2*4)+(1*1)=154 154 % 10 = 4 So 57951-41-4 is a valid CAS Registry Number.
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