The CAS Registry Mumber 1199576-10-7 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,1,9,9,5,7 and 6 respectively; the second part has 2 digits, 1 and 0 respectively. Calculate Digit Verification of CAS Registry Number 1199576-10: (9*1)+(8*1)+(7*9)+(6*9)+(5*5)+(4*7)+(3*6)+(2*1)+(1*0)=207 207 % 10 = 7 So 1199576-10-7 is a valid CAS Registry Number.