771581-81-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 771581-81-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 7,7,1,5,8 and 1 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 771581-81:
(8*7)+(7*7)+(6*1)+(5*5)+(4*8)+(3*1)+(2*8)+(1*1)=188
188 % 10 = 8
So 771581-81-8 is a valid CAS Registry Number.