220443-56-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 220443-56-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,0,4,4 and 3 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 220443-56:
(8*2)+(7*2)+(6*0)+(5*4)+(4*4)+(3*3)+(2*5)+(1*6)=91
91 % 10 = 1
So 220443-56-1 is a valid CAS Registry Number.