2177-72-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 2177-72-2 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, 7 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 2177-72:
(6*2)+(5*1)+(4*7)+(3*7)+(2*7)+(1*2)=82
82 % 10 = 2
So 2177-72-2 is a valid CAS Registry Number.