2177-65-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 2177-65-3 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,1,7 and 7 respectively; the second part has 2 digits, 6 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 2177-65:
(6*2)+(5*1)+(4*7)+(3*7)+(2*6)+(1*5)=83
83 % 10 = 3
So 2177-65-3 is a valid CAS Registry Number.