Difference between revisions of "Propylene glycol"

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== Description ==
 
== Description ==
  
A viscous hygroscopic liquid commonly used as a nontoxic [http://cameo.mfa.org/materials/fullrecord.asp?name=antifreeze antifreeze] additive in food and drinks.  Propylene glycol also acts as an [http://cameo.mfa.org/materials/fullrecord.asp?name=inhibitor inhibitor] for mold and bacteria.  Industrially, it is used as a [http://cameo.mfa.org/materials/fullrecord.asp?name=solvent solvent] and [http://cameo.mfa.org/materials/fullrecord.asp?name=emulsifier emulsifier] for [http://cameo.mfa.org/materials/fullrecord.asp?name=synthetic%20resin synthetic resins], [http://cameo.mfa.org/materials/fullrecord.asp?name=rosin rosin], and [http://cameo.mfa.org/materials/fullrecord.asp?name=essential%20oil essential oils].  Propylene glycol oxidizes with mild heat to form [http://cameo.mfa.org/materials/fullrecord.asp?name=acetic%20acid acetic], [http://cameo.mfa.org/materials/fullrecord.asp?name=pyruvic%20acid pyruvic], and [http://cameo.mfa.org/materials/fullrecord.asp?name=lactic%20acid lactic] acids.
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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.
 
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[[[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
  
[[[SliderGallery rightalign|AAIprpyleneglycol.jpg~FTIR|propylene glycol.jpg~Chemical structure]]]
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==Risks ==
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* Ingestion and inhalation may cause minor problems. 
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* Skin contact may be irritating and defatting. 
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* Flammable.  Flash point = 99C (210F)
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* ThermoFisher: [https://www.fishersci.com/msdsproxy%3FproductName%3DP3554%26productDescription%3DPROPYLENE%2BGLYCOL%2BUSP%252FFCC%2B4L%26catNo%3DP355-4%2B%26vendorId%3DVN00033897%26storeId%3D10652 SDS]
  
== Other Properties ==
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== Physical and Chemical Properties ==
  
 
Miscible with water, acetone, chloroform.  Soluble in ether.
 
Miscible with water, acetone, chloroform.  Soluble in ether.
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|-
 
|-
 
! scope="row"| Melting Point
 
! scope="row"| Melting Point
| -59
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| -59 C
 
|-
 
|-
 
! scope="row"| Density
 
! scope="row"| Density
| 1.036
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| 1.036 g/ml
 
|-
 
|-
 
! scope="row"| Molecular Weight
 
! scope="row"| Molecular Weight
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|-
 
|-
 
! scope="row"| Boiling Point
 
! scope="row"| Boiling Point
| 188.2
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| 188.2 C
 
|}
 
|}
  
== Hazards and Safety ==
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==Resources and Citations==
 
 
Ingestion and inhalation may cause minor problems.  Skin contact may be irritating and defatting.  Flammable.  Flash point = 99C (210F)
 
 
 
Mallinckrodt Baker: [http://www.jtbaker.com/msds/englishhtml/p6928.htm MSDS]
 
 
 
== Sources Checked for Data in Record ==
 
  
 
* ''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.

FTIR

AAIprpyleneglycol.jpg

Chemical structure

Propylene glycol.jpg

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