673443-81-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 673443-81-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,7,3,4,4 and 3 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 673443-81:
(8*6)+(7*7)+(6*3)+(5*4)+(4*4)+(3*3)+(2*8)+(1*1)=177
177 % 10 = 7
So 673443-81-7 is a valid CAS Registry Number.