Ingestion of dry chemical?

I was cooking some garlic toast tonight in my oven when a small fire developed. I aimed the extinguisher at the fire on the bottom of oven (the toast was on the middle rack) and discharged a small smaller amount than a second burst extinguishing the flame.

I thought about just throwing the toast away, but I was hungry and it be just some tempting. So, I ate it. The fire extinguisher says it is an irritant, but is non-toxic. Am I surrounded by any danger?

The chemical powder is listed as:

Mono ammonium-Phosphate, Mica, Ammoniun Sulfate, Talc: Nuisance dust, Irritant; HMIS 1-0-0
Answers:
So basically, you ate some fertilizers (monoammonium phosphate, ammonium sulfate), rock (mica), newborn powder (talc), and a bunch of random dust/crud. The fertilizer part is probably the worst, and the other two are basically adjectives (unless you breathe it in, which is bad). That "HMIS 1-0-0" indicates the hazard; first number is health risk, consequently flammability, then reactivity. The 1 in health signifies "Irritation or minor reversible injury possible," and the other two are 0, substance it won't burn or explode (as you would hope, for a fire extinguisher). So, it's something you don't want to be doing often, but unless you really loaded up your toast with it, you'll probably be fine this time. If you feel strange or worried, call the poison control center or go to the hospital, but otherwise, just don't do it again... (and verbs out your oven before you use it).
I wouldn't worry about it unless it covered your toast. None of them are scarily toxic.

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