The CAS Registry Mumber 1190936-75-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,1,9,0,9,3 and 6 respectively; the second part has 2 digits, 7 and 5 respectively. Calculate Digit Verification of CAS Registry Number 1190936-75: (9*1)+(8*1)+(7*9)+(6*0)+(5*9)+(4*3)+(3*6)+(2*7)+(1*5)=174 174 % 10 = 4 So 1190936-75-4 is a valid CAS Registry Number.