Refrigerate 50% Citric Acid?

I have been here less than a week, so am still newbie? LOL
I am working with a Stage IV cancer friend who is at home with Hospice care. We started MMS today and are already at 3 drops/hour with no bad signs. I am amazed and excited!

A few years ago, I used MMS and the 50% Citric Acid bottle said to refrigerate or keep in a cool dry place.
The shipment we just received had no such statement on the bottle.
Does it not need to be refrigerated now?
I know to keep it/them out of heat and direct sunlight.

PS, I hope when I post that I am doing so in the right topics/areas. I am still learning about this forum.
Thank you for understanding.

rennie, I keep mine in the cupboard - MMS1 is susceptible to UV rays. I don't remember what citric acid is susceptible to. Cool and dry, for me, is a cupboard. Or the fridge.

Thank you again pam. Much appreciated.