The CAS Registry Mumber 36003-92-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,6,0,0 and 3 respectively; the second part has 2 digits, 9 and 2 respectively. Calculate Digit Verification of CAS Registry Number 36003-92: (7*3)+(6*6)+(5*0)+(4*0)+(3*3)+(2*9)+(1*2)=86 86 % 10 = 6 So 36003-92-6 is a valid CAS Registry Number.