20916-90-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 20916-90-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,9,1 and 6 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 20916-90:
(7*2)+(6*0)+(5*9)+(4*1)+(3*6)+(2*9)+(1*0)=99
99 % 10 = 9
So 20916-90-9 is a valid CAS Registry Number.