Cool, didn't know Fritz also sells that. There is Dr. Tim's Ammonium Chloride (liquid) as well. Can't remember the strengths/concentrations.
You can cycle just fine with Ammonium Chloride so go ahead and use it.
Plants do use a bit of Chloride as a micronutrient. I know toxicity is a potential, but don't believe you would achieve toxic levels while cycling.
The more common ammonia source for cycling is Ammonium Hydroxide, typically bought as "Ammonia" as a cleaner. You'd need one that doesn't contain surfactants or any scents/other chemicals. Most common recommended one is from Ace Hardware (Ammonia, janitorial strength).