261767-57-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 261767-57-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,6,1,7,6 and 7 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 261767-57:
(8*2)+(7*6)+(6*1)+(5*7)+(4*6)+(3*7)+(2*5)+(1*7)=161
161 % 10 = 1
So 261767-57-1 is a valid CAS Registry Number.