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Propylene glycol (IUPAC name: propane-1,2-diol) is a viscous, colorless liquid.It is almost odorless and has a faintly sweet taste. Its chemical formula is CH 3 CH(OH)CH 2 OH. . As it contains two alcohol groups, it is classified as a d
Polypropylene glycol or polypropylene oxide is the polymer (or macromolecule) of propylene glycol. [1] Chemically it is a polyether , and, more generally speaking, it's a polyalkylene glycol (PAG) H S Code 3907.2000.
There is a difference in the mixing ratio, depending on whether it is ethylene glycol or propylene glycol. For ethylene glycol, the mixing ratios are typically 30/70 and 35/65, whereas the propylene glycol mixing ratios are typically 35/65 and 40/60. It is important that the mixture be frost-proof at the lowest operating temperature. [24]
When an aqueous solution of propylene glycol in a cooling or heating system develops a reddish or black color, this indicates that iron in the system is corroding significantly. In the absence of inhibitors, propylene glycol can react with oxygen and metal ions, generating various compounds including organic acids (e.g., formic, oxalic, acetic).
Glycol ethers are designated "E-series" or "P-series" for those made from ethylene oxide or propylene oxide, respectively.Typically, E-series glycol ethers are found in pharmaceuticals, sunscreens, cosmetics, inks, dyes and water-based paints, while P-series glycol ethers are used in degreasers, cleaners, aerosol paints and adhesives.
Dipropylene glycol is a mixture of three isomeric chemical compounds, 4-oxa-2,6-heptandiol, 2-(2-hydroxy-propoxy)-propan-1-ol, and 2-(2-hydroxy-1-methyl-ethoxy)-propan-1-ol. It is a colorless, nearly odorless liquid with a high boiling point and low toxicity .
Formula IUPAC Name Common name Monohydric alcohols: CH 3 OH: Methanol: Wood alcohol C 2 H 5 OH: Ethanol: Alcohol, Rubbing alcohol C 3 H 7 OH: Propan-2-ol: Isopropyl alcohol, Rubbing alcohol C 4 H 9 OH: Butan-1-ol: Butanol, Butyl alcohol C 5 H 11 OH: Pentan-1-ol: Pentanol, Amyl alcohol C 16 H 33 OH: Hexadecan-1-ol Cetyl alcohol: Polyhydric ...
It is easily soluble in water and alcohol, moderately soluble in diethyl ether, soluble in chloroform (1:100), [7] in propylene glycol, and slightly soluble in glycerin. Panthenol's expanded chemical formula is HO–CH 2 –C(CH 3) 2 –CH(OH)–CONH–CH 2 CH 2 CH 2 –OH.
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