The CAS Registry Mumber 37250-49-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,7,2,5 and 0 respectively; the second part has 2 digits, 4 and 9 respectively. Calculate Digit Verification of CAS Registry Number 37250-49: (7*3)+(6*7)+(5*2)+(4*5)+(3*0)+(2*4)+(1*9)=110 110 % 10 = 0 So 37250-49-0 is a valid CAS Registry Number.