22957-99-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 22957-99-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,2,9,5 and 7 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 22957-99:
(7*2)+(6*2)+(5*9)+(4*5)+(3*7)+(2*9)+(1*9)=139
139 % 10 = 9
So 22957-99-9 is a valid CAS Registry Number.