201799-21-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 201799-21-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,1,7,9 and 9 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 201799-21:
(8*2)+(7*0)+(6*1)+(5*7)+(4*9)+(3*9)+(2*2)+(1*1)=125
125 % 10 = 5
So 201799-21-5 is a valid CAS Registry Number.