227957-81-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 227957-81-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,7,9,5 and 7 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 227957-81:
(8*2)+(7*2)+(6*7)+(5*9)+(4*5)+(3*7)+(2*8)+(1*1)=175
175 % 10 = 5
So 227957-81-5 is a valid CAS Registry Number.