21594-90-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21594-90-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,5,9 and 4 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 21594-90:
(7*2)+(6*1)+(5*5)+(4*9)+(3*4)+(2*9)+(1*0)=111
111 % 10 = 1
So 21594-90-1 is a valid CAS Registry Number.