69905-91-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 69905-91-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,9,9,0 and 5 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 69905-91:
(7*6)+(6*9)+(5*9)+(4*0)+(3*5)+(2*9)+(1*1)=175
175 % 10 = 5
So 69905-91-5 is a valid CAS Registry Number.