What are the physical and chemical properties of propylene glycol?
Propylene Glycol is a viscous, stable, hygroscopic liquid. It is essentially colorless and has a slight odor and a very slight acid taste. Propylene glycol is completely miscible with water and many organic solvents and will dissolve a number of resins, dyes and essential oils.
What pH is propylene glycol?
Protein/propylene glycol alginate gels can be formed using 6% protein in a suitable 0.1 M buffer solution in the pH range 9.3 to 10.5.
What temperature does propylene glycol freeze?
-74.2°F (-59°C)Propylene glycol / Melting point
What color is propylene glycol?
colorless
Propylene glycol is clear, colorless, slightly syrupy liquid at room temperature. It may exist in air in the vapor form, although propylene glycol must be heated or briskly shaken to produce a vapor. Propylene glycol is practically odorless and tasteless.
What is the pH of propylene glycol?
9.3 to 10.5
Protein/propylene glycol alginate gels can be formed using 6% protein in a suitable 0.1 M buffer solution in the pH range 9.3 to 10.5.
Is propylene glycol an alcohol?
Propylene glycol is an alcohol that absorbs water and mixes completely with many solvents. While you might see propylene glycol described as an organic compound, this does not mean it’s naturally occurring.
What happens to propylene glycol when heated?
When propylene glycol is heated it may change the chemical composition and produce propylene oxide in a little amount which is known as carcinogen [11].
Is propylene glycol an acid or a base?
Propylene glycol, also known as 1,2-propanediol or methyl glycol, belongs to the class of organic compounds known as 1,2-diols. These are polyols containing an alcohol group at two adjacent positions. Propylene glycol is an extremely weak basic (essentially neutral) compound (based on its pKa).
Is glycol acidic or basic?
Ethylene glycol is a diol, an alcohol with a molecular structure that contains two hydroxyl (OH) groups, and terephthalic acid is a dicarboxylic aromatic acid, an acid with a molecular structure that contains a large, six-sided carbon (or aromatic) ring and two carboxyl (CO2H) groups.
Does propylene glycol react with stainless steel?
Having said this, 316L stainless steel is considered compatible with propylene glycol under many conditions and is a recommended material of construction for glycol storage.
What are the harmful effects of propylene glycol?
It is water-soluble.
What effect does propylene glycol have on the lungs?
When propylene glycol (PG) cools down in the lungs, it can polymerize, or combine to form larger molecules, essentially forming plastic in our lungs. This process contributes to the development of popcorn lung , even though diacetyl exposure gets most of the blame in the media.
What is the flash point of propylene glycol?
Propylene glycol has has flash point ~101 degC. What is the wt% of water needed to increase the flash point to ~150degC? Join ResearchGate to ask questions, get input, and advance your work. Can you help by adding an answer? Calculating heat transfer from upper layer of tube to lower layer of tube?
What are the properties of glycol?
It is used in the manufacture of polyester as a raw agent