Dog has a tumor on his spleen

Hi everyone!  My name is Mitch.  My 7yr old German Shepherd has a tumor on his spleen.  Does anyone know good protocols for dogs?  I had some sodium chlorite and citric acid from a year ago but it’s not turning the amber color.  Does anyone have that problem? It was in my storage locker so the temp could have changed but it was in a dark bottle in a bin.  Is there any place or anyone that has a lead on getting at least the sodium chlorite flakes?  I’m willing to drive up to 6 hours from Salt Lake City to pick up. (Boise, Las Vegas, Reno).  Time is working against me.  Thank you in advance for any help you all could provide!  🙏🙏🙏