Non-toxic.
Under normal circumstances, the antifreeze provided by professional solar companies is not toxic, but the antifreeze provided by the market circulation link is likely to be toxic. If you use a glycerol mixture, it is expensive but non-toxic; Currently, the automobile antifreeze on the market is mainly ethylene glycol because it is economical, but it is toxic.
Propylene glycol is an important raw material for unsaturated polyester, epoxy resin and polyurethane resin. The amount used in this area represents approximately 45% of the total propylene glycol consumption. This unsaturated polyester is widely used in. surface coatings and reinforced plastics. Propylene glycol has good viscosity and hygroscopicity and is non-toxic. It is therefore widely used as a hygroscopic agent, antifreeze, lubricant and solvent in food, pharmaceutical and other industries.osmetic.
Detailed information:
Propylene glycol is also used as a tobacco humidifier, an antifungal agent, a lubricant for food processing equipment, and a solvent for food marking inks. Aqueous solutions of propylene glycol are effective antifreeze agents. It is also used as a tobacco wetting agent, antifungal agent, tobacco maturation preservative.fruits, antifreeze and heat carrier.
Baidu Encyclopedia - Propylene Glycol
1 Solar medium is antifreeze, generally add 20 L.
2. The full name of antifreeze should be called antifreeze coolant, which means coolant with antifreeze function. Antifreeze can prevent coolant from freezing and cracking the radiator and freezing the engine's cylinder block or cylinder head during cold winter parking. Many people think that antifreeze is only used in winter, but in fact antifreeze is used all year round.