2872-91-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 2872-91-5 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,8,7 and 2 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 2872-91:
(6*2)+(5*8)+(4*7)+(3*2)+(2*9)+(1*1)=105
105 % 10 = 5
So 2872-91-5 is a valid CAS Registry Number.