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What is the Difference Between Butylene Glycol and Propylene Glycol


The difference between butylene glycol and propylene glycol is as follows:

Different uses: Butanediol is mainly used to make solvents, plastics, coatings, pigments, resins, fibers, etc. It can also be used to make softeners, refrigerant fluids, heat exchange fluids, etc. Propylene glycol is mainly used in the manufacture of coatings, resins, paints, fibers, etc. It can also be used in the manufacture of medicines, spices and food additives.
Different water solubility: Butanediol has poor water solubility, its solubility in water is only 3.6%. Propylene glycol has better water solubility, and its solubility in water can reach 100%.
Different melting points: The melting point of butanediol is relatively low, only -74°C. The melting point of propylene glycol is relatively high, -16.6°C.
Differences in Toxicity: Butylene glycol is more toxic than propylene glycol. The LD50 value of butylene glycol is 1.5g/kg, while the LD50 value of propylene glycol is 5.6g/kg.

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