81777-39-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 81777-39-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,7,7 and 7 respectively; the second part has 2 digits, 3 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 81777-39:
(7*8)+(6*1)+(5*7)+(4*7)+(3*7)+(2*3)+(1*9)=161
161 % 10 = 1
So 81777-39-1 is a valid CAS Registry Number.