Potassium chloride is used for making fertilizer, fire extinguishing agent, and for lethal injections. And now for baby formula!
Nestle recently changed their NAN H.A. Gold baby formula to include potassium chloride - and what a surprise - babies are getting sick!
Nestle says it is safe. Independant tests have confirmed it is not a food safety issue.
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Side effects can include gastrointestinal discomfort including nausea and vomiting, diarrhea and bleeding of the digestive tract. Overdoses cause hyperkalemia, which can lead to paresthesia, cardiac conduction blocks, fibrillation, arrhythmias, and sclerosis.
Orally, potassium chloride is toxic in excess; the LD50 is around 2.5 g/kg (meaning that a lethal dose for 50% of people weighing 75 kg (165 lb) is about 190 g (6.7 ounces)). Intravenously, this is reduced to just over 30 mg/kg, but of more concern are its severe effects on the cardiac muscles: high doses can cause cardiac arrest and rapid death, thus the aforementioned use as the third and final drug delivered in the lethal injection process.
Source: http://en.wikipedia.org/wiki/Potassium_chloride 
So if 6.7 ounces is lethal for a 165 lbs adult, how much can an newborn tolerate?
Is my math right? For a 9 lb baby - 0.37 ounce would be lethal?
How much would a baby ingest over a day's time?