21167-41-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21167-41-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,1,6 and 7 respectively; the second part has 2 digits, 4 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 21167-41:
(7*2)+(6*1)+(5*1)+(4*6)+(3*7)+(2*4)+(1*1)=79
79 % 10 = 9
So 21167-41-9 is a valid CAS Registry Number.