Nature:
Thiourea is a colorless crystalline solid with a distinctive sour and pungent smell.
It has good solubility and is soluble in polar solvents such as water, alcohol and ether.
Thiourea can decompose at high temperatures, generating products such as mercaptans and formamide.

Purpose:
Thiourea is often used in the preparation of accelerators and vulcanizing agents for synthetic rubber.
Thiourea can also be used as a reagent in the dye, pesticide and electroplating industries, etc.

Preparation:
The main methods for preparing thiourea are as follows:
Urea and sulfur reaction: Urea and sulfur are heated under acidic conditions to react, generating thiourea.
Ammonium sulfate and ammonia water reaction: React ammonium sulfate with ammonia water at an appropriate temperature to form thiourea.

Safety information
Thiourea has a mild irritant effect. If it comes into contact with the skin or eyes, rinse immediately with clean water.
Avoid prolonged or excessive inhalation of thiourea dust to prevent irritation to the respiratory system.
When using thiourea, it is necessary to maintain good ventilation conditions and avoid mixing it with oxidants, strong acids and strong bases, etc.