Propylene Glycol

• CAS: 57-55-6
• Catalog Number: ACM57556
• Category: Main Products
• Molecular Weight: 76.09
• Molecular Formula: C3H8O2
• Description: Modified alcohol (1,2-propanediol), metabolized to lactic acid in the body.
• Synonyms: Propyleneglycol manufacturer
• IUPAC Name: Propane-1,2-diol
• 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
• 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
• Autoignition Temperature: 700 °F (USCG, 1999);700 °F (371 °C);420 °C
• Color/Form: Colorless viscous liquid
• Complexity: 20.9
• Composition: Propylene glycol
• Covalently-Bonded Unit Count: 1
• Decomposition: When heated to decomposition it emits acrid smoke and irritating fumes.
• Defined Atom Stereocenter Count: 0
• EC Number: 200-338-0;200-338-0;613-293-0
• Exact Mass: 76.052429494
• Features And Benefits: Effective humectant and wetting agent preventing water loss in products and in the skinIncreases skin permeability of active ingredients as it penetrates into the outermost skin layersEmollient and lubricant propertiesExcellent solubilizer of other ingredientsIncreases spreading of creams
• Formal Charge: 0
• H-Bond Acceptor: 2
• H-Bond Donor: 2
• Heat of Vaporization: 168.6 cal/g at BP
• Heavy Atom Count: 5
• HS Code: 2905320000
• Hydrogen Bond Acceptor Count: 2
• Hydrogen Bond Donor Count: 2
• ICSC Number: 0321
• LogP: -0.92 (LogP);-0.92;log Kow = -0.92;-0.92;-0.92
• Monoisotopic Mass: 76.052429494
• NSC Number: 69860;35749;35748;35747
• Odor: Practically odorless
• Other Experimental: Specific heat: 0.590 cal/g at 20 °C; hygroscopic;Heat of vaporization = 15.4 kcal/mol at 25 °C; heat of formation = -116.1 kcal/mol at 25 °C (liquid); heat capacity = 45.1 kcal/mol at 20 °C; viscosity = 56.0 cP at 20 °C; surface tension = 36.51 dyne/cm at 25 °C;BP: 88-90 °C at 12 mm Hg; 187-189 °C at 760 mm Hg. Specific optical rotation: -15 deg at 20 °C /l-form/;BP: 95-96 °C at 14 mm Hg; Specific optical rotation: +15 (neat) deg at 20 °C; Density: 1.04 at 25 °C/4/ degC /d-form/;Henry's Law constant = 1.3X10-8 atm-cu m/mol at 25 °C (est);Hydroxyl radical reaction rate constant = 1.2X10-11 cu cm/molec-sec at 25 °C
• Physical State: Viscous liquid
• pKa: 14.49±0.20(Predicted)
• Refractive Index: n20/D 1.432(lit.)
• Rotatable Bond Count: 1
• RTECS Number: TY2000000
• 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
• Vapor Density: 2.62 (NTP, 1992) (Relative to Air);Relative vapor density (air = 1): 2.6;2.62
• Vapor Pressure: 0.08 mm Hg at 68 °F ; 0.13 mm Hg at 77° F (NTP, 1992);0.13 mmHg;0.13 mm Hg at 25 °C /Extrapolated/;Vapor pressure, Pa at 20 °C: 10.6;0.08 mmHg
• Viscosity: 0.581 cP at 20 °C
• XLogP3: -0.9

Custom Q&A

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.