1172016-21-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1172016-21-5 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,1,7,2,0,1 and 6 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1172016-21:
(9*1)+(8*1)+(7*7)+(6*2)+(5*0)+(4*1)+(3*6)+(2*2)+(1*1)=105
105 % 10 = 5
So 1172016-21-5 is a valid CAS Registry Number.