166884-21-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 166884-21-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,6,8,8 and 4 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 166884-21:
(8*1)+(7*6)+(6*6)+(5*8)+(4*8)+(3*4)+(2*2)+(1*1)=175
175 % 10 = 5
So 166884-21-5 is a valid CAS Registry Number.