399580-57-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 399580-57-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,9,9,5,8 and 0 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 399580-57:
(8*3)+(7*9)+(6*9)+(5*5)+(4*8)+(3*0)+(2*5)+(1*7)=215
215 % 10 = 5
So 399580-57-5 is a valid CAS Registry Number.