Difference between revisions of "Propylene glycol"
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== Description == | == Description == | ||
| − | A viscous hygroscopic liquid commonly used as a nontoxic [ | + | A viscous hygroscopic liquid commonly used as a nontoxic [[antifreeze|antifreeze]] additive in food and drinks. Propylene glycol also acts as an [[inhibitor|inhibitor]] for mold and bacteria. Industrially, it is used as a [[solvent|solvent]] and [[emulsifier|emulsifier]] for [[synthetic%20resin|synthetic resins]], [[rosin|rosin]], and [[essential%20oil|essential oils]]. Propylene glycol oxidizes with mild heat to form [[acetic%20acid|acetic]], [[pyruvic%20acid|pyruvic]], and [[lactic%20acid|lactic]] acids. In building shut down during the pandemic, propylene glycol was poured into drains to keep them moist, thus minimizing pest incursionsthrough the pipes. |
| − | + | [[[SliderGallery rightalign|AAIprpyleneglycol.jpg~FTIR|propylene glycol.jpg~Chemical structure]]] | |
== Synonyms and Related Terms == | == Synonyms and Related Terms == | ||
1,2-propanediol; methyl glycol; 1,2-dyhydroxypropane; methylethylene glycol | 1,2-propanediol; methyl glycol; 1,2-dyhydroxypropane; methylethylene glycol | ||
| − | [ | + | ==Risks == |
| + | |||
| + | * Ingestion and inhalation may cause minor problems. | ||
| + | * Skin contact may be irritating and defatting. | ||
| + | * Flammable. Flash point = 99C (210F) | ||
| + | * ThermoFisher: [https://www.fishersci.com/msdsproxy%3FproductName%3DP3554%26productDescription%3DPROPYLENE%2BGLYCOL%2BUSP%252FFCC%2B4L%26catNo%3DP355-4%2B%26vendorId%3DVN00033897%26storeId%3D10652 SDS] | ||
| − | == | + | == Physical and Chemical Properties == |
Miscible with water, acetone, chloroform. Soluble in ether. | Miscible with water, acetone, chloroform. Soluble in ether. | ||
| Line 22: | Line 27: | ||
|- | |- | ||
! scope="row"| Melting Point | ! scope="row"| Melting Point | ||
| − | | -59 | + | | -59 C |
|- | |- | ||
! scope="row"| Density | ! scope="row"| Density | ||
| − | | 1.036 | + | | 1.036 g/ml |
|- | |- | ||
! scope="row"| Molecular Weight | ! scope="row"| Molecular Weight | ||
| Line 31: | Line 36: | ||
|- | |- | ||
! scope="row"| Boiling Point | ! scope="row"| Boiling Point | ||
| − | | 188.2 | + | | 188.2 C |
|} | |} | ||
| − | == | + | ==Resources and Citations== |
| − | |||
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* ''The Merck Index'', Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 | * ''The Merck Index'', Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 | ||
Latest revision as of 13:36, 22 October 2022
Description
A viscous hygroscopic liquid commonly used as a nontoxic Antifreeze additive in food and drinks. Propylene glycol also acts as an Inhibitor for mold and bacteria. Industrially, it is used as a Solvent and Emulsifier for synthetic resins, Rosin, and essential oils. Propylene glycol oxidizes with mild heat to form acetic, pyruvic, and lactic acids. In building shut down during the pandemic, propylene glycol was poured into drains to keep them moist, thus minimizing pest incursionsthrough the pipes.
Synonyms and Related Terms
1,2-propanediol; methyl glycol; 1,2-dyhydroxypropane; methylethylene glycol
Risks
- Ingestion and inhalation may cause minor problems.
- Skin contact may be irritating and defatting.
- Flammable. Flash point = 99C (210F)
- ThermoFisher: SDS
Physical and Chemical Properties
Miscible with water, acetone, chloroform. Soluble in ether.
| Composition | C3H8O2 |
|---|---|
| CAS | 57-55-6 |
| Melting Point | -59 C |
| Density | 1.036 g/ml |
| Molecular Weight | mol. wt.=76.09 |
| Boiling Point | 188.2 C |
Resources and Citations
- The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983
- MSDS Sheet