321945-81-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 321945-81-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,2,1,9,4 and 5 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 321945-81:
(8*3)+(7*2)+(6*1)+(5*9)+(4*4)+(3*5)+(2*8)+(1*1)=137
137 % 10 = 7
So 321945-81-7 is a valid CAS Registry Number.