2157-84-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 2157-84-8 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,1,5 and 7 respectively; the second part has 2 digits, 8 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 2157-84:
(6*2)+(5*1)+(4*5)+(3*7)+(2*8)+(1*4)=78
78 % 10 = 8
So 2157-84-8 is a valid CAS Registry Number.