you will need to list the ingredients listed on the bottle....why don't you use a raw shrimp?
Finding 100% pure ammonia is sometimes challenging because many brands contain cleaning agents, sudsing agents or perfume, which are unsuitable for aquarium use.
Read the ingredients, use only “Pure Ammonia” or “100% Ammonium Hydroxide”. Chelating agents are OK.
If you are still not sure about the purity of a given bottle of ammonia, try shaking the bottle, pure ammonia will not foam, ACE Hardware, Top Crest & Whirl Clear are reportedly good brands to look for.