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CONTACT US| Catalog Number | ACM57556-2 |
| CAS | 57-55-6 |
| Structure |  |
| Description | Modified alcohol (1,2-propanediol), metabolized to lactic acid in the body. |
| Synonyms | Propyleneglycol manufacturer |
| IUPAC Name | Propane-1,2-diol |
| Molecular Weight | 76.09 |
| Molecular Formula | C3H8O2 |
| Canonical SMILES | CC(CO)O |
| InChI | InChI=1S/C3H8O2/c1-3(5)2-4/h3-5H,2H2,1H3 |
| InChI Key | DNIAPMSPPWPWGF-UHFFFAOYSA-N |
| Boiling Point | 187 °C(lit.) |
| Melting Point | -60 °C(lit.) |
| Flash Point | 225 °F |
| Purity | 99+% |
| Density | 1.036 g/mL at 25 °C(lit.) |
| Solubility | Soluble in water, ethanol, acetone |
| Appearance | Liquid |
| Application | All kinds of skin care products, hair care products, color cosmetics, soaps (glycerin soap). |
| Storage | 5-30 °C |
| Complexity | 20.9 |
| Composition | Propylene glycol |
| Covalently-Bonded Unit Count | 1 |
| Defined Atom Stereocenter Count | 0 |
| EC Number | 200-338-0;200-338-0;613-293-0 |
| Exact Mass | 76.052429494 |
| Heavy Atom Count | 5 |
| Hydrogen Bond Acceptor Count | 2 |
| Hydrogen Bond Donor Count | 2 |
| LogP | -0.92 (LogP);-0.92;log Kow = -0.92;-0.92;-0.92 |
| Monoisotopic Mass | 76.052429494 |
| Physical State | Viscous liquid |
| Rotatable Bond Count | 1 |
| Stability | At cool temperatures, propylene glycol is stable in a well-closed container, but at high temperatures, in the open, it tends to oxidize, giving rise to products such as propionaldehyde, lactic acid, pyruvic acid, and acetic acid. Propylene glycol is chemically stable when mixed with ethanol (95%), glycerin, or water; aqueous solutions may be sterilized by autoclaving. |
| Storage Conditions | 5-30 °C |
| Topological Polar Surface Area | 40.5 Ų |
| Viscosity | 0.581 cP at 20 °C |
Saka C, et al. International Journal of Hydrogen Energy, 2024, 65, 410-420.
Propylene glycol (PG), a versatile organic solvent with low toxicity, plays a significant role in enhancing hydrogen (H₂) production efficiency when combined with innovative hybrid catalysts. Recent research demonstrated the use of a hybrid metal-free catalyst, Chit-Mont-H, which involves chitosan (Chit) dispersed on montmorillonite (Mont) and subsequently protonated through calcination and hydrothermal methods. This novel Chit-Mont-H catalyst, when paired with propylene glycol or a mixture of propylene glycol and methanol, enabled highly efficient H₂ production from sodium borohydride (NaBH₄), marking a first in literature.
Characterization techniques confirmed the structural and chemical properties of Chit-Mont-H. Propylene glycol, as a reaction medium, provided unique benefits by interacting synergistically with the Chit-Mont-H catalyst, facilitating NaBH₄ hydrolysis and optimizing H₂ release rates. The catalytic experiments conducted with varying concentrations of NaBH₄ (0.125-0.5 g) and different ratios of propylene glycol to methanol (ranging from 1:9 to 6:4) across temperatures (20, 30, 40, and 50 °C) showcased that the propylene glycol/methanol mixture significantly enhanced H₂ production rates compared to pure solvents.
Importantly, the reusability tests of the Chit-Mont-H catalyst in a propylene glycol/methanol medium demonstrated excellent stability and consistency in H₂ generation over five cycles at 30 °C. The efficient recycling without significant loss of catalytic performance highlights the potential of propylene glycol as a sustainable solvent in catalytic systems.
What is the molecular formula of propylene glycol?
The molecular formula of propylene glycol is C3H8O2.
What are some synonyms for propylene glycol?
Some synonyms for propylene glycol are 1,2-propanediol, propane-1,2-diol, and methyl glycol.
How is propylene glycol classified by the Food and Drug Administration (FDA)?
The FDA has classified propylene glycol as an additive that is "generally recognized as safe" for use in food.
What industries use propylene glycol as an antifreeze?
The chemical, food, and pharmaceutical industries use propylene glycol as an antifreeze when leakage might lead to contact with food.
What is the molecular weight of propylene glycol?
The molecular weight of propylene glycol is 76.09 g/mol.
What role can propylene glycol play in pharmaceuticals, cosmetics, and food products?
Propylene glycol can absorb extra water and maintain moisture in certain medicines, cosmetics, or food products.
What is the structure of propylene glycol?
The structure of propylene glycol is CH3CHOHCH2OH.
How is propylene glycol used in fire-fighting training and theatrical productions?
Propylene glycol is used to create artificial smoke or fog used in fire-fighting training and theatrical productions.
Can propylene glycol exist in air in vapor form at room temperature?
Propylene glycol must be heated or briskly shaken to produce a vapor and exist in air in the vapor form.
What is the odor and taste of propylene glycol?
Propylene glycol is practically odorless and tasteless.
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