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Propylene Glycol and polypropylene glycols are also referred as polyglycols, which is derived by the polymerization of the ethylene oxide and the propylene oxide respectively. This chemical is water-soluble, but they become progressively less water-soluble at high molecular weights. The Tripropylene glycol is one among the first three members of a homologous series of propylene glycol, which is totally water and ethanol soluble; forming the most homogeneous mixture when added with organic solvents including acetone, chloroform and other essential oils that are soluble in 12 parts of ether. This chemical is odorless and colorless having a boiling point of 188 C and the freezing point of -39 C.
The Propylene glycol chemical is manufactured via hydrolysis of propylene oxide. This chemical is mainly used in plastic industry for manufacturing polyester fibers and alkyd resins. Added to this, the propylene glycol acts as the main ingredient in manufacturing automobile antifreeze and engine-cooling liquids. Due to its useful properties of low freezing point, stability and low corrosive activity, this chemical is used in preparing brake and hydraulic fluids.
Besides, the propylene glycol is used to manufacture body-care surfactants. This chemical is completely successful in replacing the toxic ethylene glycol and ethanol chemicals as it is less toxic when compared to others. This chemical is a safe ingredient which is used food, cosmetics, and medicines and mainly it is approved by FDA. Propylene glycol USP grade is used as non-toxic antifreeze in breweries and dairies. The polyglycols is also used as humectants in cosmetics, foods and to name a few. Besides, it acts as an efficient solvent and coloring or flavoring agent.
The propylene glycol is used in many injectable, oral and contemporary pharmaceuticals. The antibacterial property of this chemical made itself to be suitable for preparing sanitizing lotions.
Density: 1.04 g/cm³
Boiling point: 188.2 °C
Melting point: -59 °C
Molar mass: 76.09 g/mol
IUPAC ID: propane-1,2-diol
USAGE OF PROPYLENE GLYCOL Posted on 8/23/2016
Due to its tiny toxicity and pleasing odor. Propylene glycol ether series is honored as environmentally friendly solvent. It has high security, and can be used in industrial or household cleaner formulations. Now it has been recommended by many developed countries especially in Japan. It is widely used in the paint. Cleaning agents, ink, leather and other aspects. it can be used instead of an alcohol solvent such as ethylene glycol butyl ether during the process of dissolution of the dye. In addition. propylene glycol ether series also can be used as coating film forming additives . sensitive adhesive, PS version cleaning, printing, electronic chemicals, jet fuel additives (water repellent). extraction solvent and high boiling point solvents.
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