54839-91-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 54839-91-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,4,8,3 and 9 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 54839-91:
(7*5)+(6*4)+(5*8)+(4*3)+(3*9)+(2*9)+(1*1)=157
157 % 10 = 7
So 54839-91-7 is a valid CAS Registry Number.