56121-90-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 56121-90-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,6,1,2 and 1 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 56121-90:
(7*5)+(6*6)+(5*1)+(4*2)+(3*1)+(2*9)+(1*0)=105
105 % 10 = 5
So 56121-90-5 is a valid CAS Registry Number.