My 1 lb bag from L.D. Carlson stated 1 tsp per gallon....now I am reading that it is 1 tsp per 5 gallons???? Am I just going to have a hyper speed fermentation in my conical or do I need to be worried about poisoning my customers???? Is there a negative to what I did. I have 35 gallons in my conical right now and don't want to have to dump it if I don't have to...
Do you run a commercial brewery? If so, you might want to revisit any processes that leave you asking this question. If not, you might want to refrain from making it publicly known that you are selling homebrew.
From an MSDS for Diammonium Phosphate: POTENTIAL HEALTH EFFECTS: Acute Eye: May cause irritation. Acute Skin: Skin absorption not likely. May cause irritation. Acute Inhalation: May cause upper respiratory tract irritation. Acute Ingestion: Ingestion of large quantities may cause nausea, vomiting, diarrhea, abdominal cramps. Chronic Effects: This product does not contain any ingredient as probable or suspected human carcinogen. Can't tell you what the dosage is that would cause acute ingestion symptoms. Your call.... If it made people ill, I doubt it would be a positive experience for your customers and would be bad for business.
Just dump it, you clearly are not ready to brew and sell anything to the general public. Go and learn first, get some experience then go on your own the amount you used is what is used in meads and wines all the time as they lack the necessary nitrogen that yeast need. All grain wort has available nitrogen for the yeast, which is why you will see it suggested to add less, if you add any at all
For what it's worth, some additional information from the MSDS: Ingestion of large quantities of phosphate salts (over 1.0 grams for an adult) may cause an osmotic catharsis resulting in diarrhea and probable abdominal cramps. Larger doses such as 4-8 grams will almost certainly cause these effects in everyone. In healthy individuals most of the ingested salt will be excreted in the feces with the diarrhea and, thus, not cause any systemic toxicity. Doses greater than 10 grams hypothetically may cause systemic toxicity. Take the hit and dump it. Get to know your process and ingredients better before you go public.
Let's see. If DAP is around 4 grams per teaspoon... It was added at a rate of 4 grams per gallon, or 1 gram per quart. Unless OP knows that whatever it is in the DAP that causes diarrhea (etc.) is transformed by the fermentation, we're talking about a couple of pints for his customer to hit the 1 gram (equivalent) level. I'd dump. (The beer.)
