The CAS Registry Mumber 57094-01-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,7,0,9 and 4 respectively; the second part has 2 digits, 0 and 1 respectively. Calculate Digit Verification of CAS Registry Number 57094-01: (7*5)+(6*7)+(5*0)+(4*9)+(3*4)+(2*0)+(1*1)=126 126 % 10 = 6 So 57094-01-6 is a valid CAS Registry Number.