690631-40-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 690631-40-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,9,0,6,3 and 1 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 690631-40:
(8*6)+(7*9)+(6*0)+(5*6)+(4*3)+(3*1)+(2*4)+(1*0)=164
164 % 10 = 4
So 690631-40-4 is a valid CAS Registry Number.