166809-88-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 166809-88-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,6,8,0 and 9 respectively; the second part has 2 digits, 8 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 166809-88:
(8*1)+(7*6)+(6*6)+(5*8)+(4*0)+(3*9)+(2*8)+(1*8)=177
177 % 10 = 7
So 166809-88-7 is a valid CAS Registry Number.