221044-37-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 221044-37-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,0,4 and 4 respectively; the second part has 2 digits, 3 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 221044-37:
(8*2)+(7*2)+(6*1)+(5*0)+(4*4)+(3*4)+(2*3)+(1*7)=77
77 % 10 = 7
So 221044-37-7 is a valid CAS Registry Number.