1771-77-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1771-77-3 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,7,7 and 1 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 1771-77:
(6*1)+(5*7)+(4*7)+(3*1)+(2*7)+(1*7)=93
93 % 10 = 3
So 1771-77-3 is a valid CAS Registry Number.