The Multiple Effects of Precursors on the Properties of Polymeric Carbon Nitride

Table 1

The cost, acute toxicity, and melting point of thiourea, dicyandiamide, melamine, and urea [16].

Precursors	Cost ($/t)	Acute toxicity; LD50 (oral, rat)	Melting point (°C)
Thiourea	3906	125 mg/kg	182
Dicyandiamide	1538	4000 mg/kg	209
Melamine	2025	3248 mg/kg	345
Urea	450	8500 mg/kg	133