810689-81-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 810689-81-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,1,0,6,8 and 9 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 810689-81:
(8*8)+(7*1)+(6*0)+(5*6)+(4*8)+(3*9)+(2*8)+(1*1)=177
177 % 10 = 7
So 810689-81-7 is a valid CAS Registry Number.