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  2. Propylene glycol - Wikipedia

    en.wikipedia.org/wiki/Propylene_glycol

    [7] [17] Water-propylene glycol mixtures dyed pink to indicate the mixture is relatively nontoxic are sold under the name of RV or marine antifreeze. Propylene glycol is frequently used as a substitute for ethylene glycol in low toxicity, environmentally friendly automotive antifreeze.

  3. Antifreeze - Wikipedia

    en.wikipedia.org/wiki/Antifreeze

    An antifreeze is an additive which lowers the freezing point of a water-based liquid. An antifreeze mixture is used to achieve freezing-point depression for cold environments. Common antifreezes also increase the boiling point of the liquid, allowing higher coolant temperature. [1] However, all common antifreeze additives also have lower heat ...

  4. Green solvent - Wikipedia

    en.wikipedia.org/wiki/Green_solvent

    Green solvents are environmentally friendly chemical solvents that are used as a part of green chemistry.They came to prominence in 2015, when the UN defined a new sustainability-focused development plan based on 17 sustainable development goals, recognizing the need for green chemistry and green solvents for a more sustainable future. [1]

  5. Natural refrigerant - Wikipedia

    en.wikipedia.org/wiki/Natural_refrigerant

    Hydrocarbons are also environmentally friendly, as they exist in nature and rank low on the global warming potential (GWP) scale. [11] Historically, hydrocarbons have mainly seen use as a refrigerant for industrial chilling and refrigeration, but with the current shift towards natural refrigerants they are starting to see an increase in use in ...

  6. Coolant - Wikipedia

    en.wikipedia.org/wiki/Coolant

    Coolant. A coolant is a substance, typically liquid, that is used to reduce or regulate the temperature of a system. An ideal coolant has high thermal capacity, low viscosity, is low-cost, non-toxic, chemically inert and neither causes nor promotes corrosion of the cooling system. Some applications also require the coolant to be an electrical ...

  7. Green chemistry - Wikipedia

    en.wikipedia.org/wiki/Green_chemistry

    Green chemistry. Green chemistry, similar to sustainable chemistry or circular chemistry, [1] is an area of chemistry and chemical engineering focused on the design of products and processes that minimize or eliminate the use and generation of hazardous substances. [2] While environmental chemistry focuses on the effects of polluting chemicals ...

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