yes
Urea is the less toxic in nature among the nitrogenous wastes where as Ammonia is 100,000 times toxic than urea.
Urea is less toxic than ammonia.
Urea is used in fertilizers and is not considered toxic. Ammonia is toxic and is what converts readily to urea.
Urea
Kidneys excrete urea which is a less concentrated form of uric acid and toxic waste .
the kidney is referred to as an excretory organ and excretes urea, which is a less toxic form of uric acid.
ammonium ion, which is the end product of amino acid degradation, is toxic if allowed to accumulate. the urea cycle is a pathway that detoxifies the ammonium ions by converting it to urea - which is then transported to the kidneys to form urine... the function is to remove nitrogen waste from the body and avoid toxicity
NH4 is most toxic, in fact in mammals it is always transported in the form of glutamate, because it is so toxic. So if this is in reference to humans, that is the most likely answer. NH3 on the other hand is non toxic unless present in high concentrations for whatever reason (such as problems with excretion when it is converted to Urea
phase diagram of urea and benzoic acid
acid
No Urea phosphate: (NH2)2CO + H3PO4 Uric acid : over on the left uric acid contains a urea-structure, but there is no phosphate/phosphoric acid in the structure.