Propylene Glycol - Materials / Alfa Chemistry

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Propylene Glycol

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Catalog Number

ACMA00017168

Product Name

Propylene Glycol

Category

Polymers

Description

Thick odorless colorless liquid. Mixes with water. (USCG, 1999);DryPowder, Liquid; Liquid; OtherSolid; OtherSolid, Liquid; WetSolid; WetSolid, Liquid; WetSolid, OtherSolid;Clear, colourless, hygroscopic, viscous liquid;Liquid;Liquid;COLOURLESS ODOURLESS HYGROSCOPIC VISCOUS LIQUID.;Thick odorless colorless liquid.

IUPAC Name

propane-1,2-diol

Molecular Weight

76.09g/mol

Molecular Formula

C3H8O2;C3H8O2;CH3CHOHCH₂OH;C3H8O2;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

370.8 °F at 760 mm Hg (NTP, 1992);187.6 °C;187.6 °C;188.2 °C;370.8°F

Melting Point

-76 °F (NTP, 1992);-60.0 °C;-60 °C;-60 °C;-60°C;-59 °C;-76°F

Flash Point

210 °F (NTP, 1992);104 °C Pensky-Martens closed cup;210 °F (99 °C) (Closed cup);225 °F (Open cup);101 °C c.c.;210°F

Density

1.04 at 68 °F (USCG, 1999);1.0361 g/cu cm at 20 °C;Relative density (water = 1): 1.04;1.04

Solubility

greater than or equal to 100 mg/mL at 70° F (NTP, 1992);13.14 M;Soluble in water, ethanol and acetone;1000 mg/mL at 20 °C;Soluble in benzene;Miscible with acetone and chloroform; soluble in ether. Will dissolve many essential oils, but is immiscible with fixed oils.;In water, 1X10+6 mg/L at 20 °C /miscible/;1000 mg/mL at 20 °C;Solubility in water: miscible

Color/Form

Colorless viscous liquid

Complexity

20.9

Covalently-Bonded Unit Count

EC Number

200-338-0;200-338-0;613-293-0

Exact Mass

76.052429g/mol

Formal Charge

Heat of Vaporization

168.6 cal/g at BP

Heavy Atom Count

ICSC Number

0321

Log P

-0.92 (LogP);-0.92;log Kow = -0.92;-0.92;-0.92

MeSH Entry Terms

1,2 Propanediol;1,2-Propanediol;Glycol, Propylene;Monohydrate, Propylene Glycol;Propan-1,2-Diol;Propylene Glycol;Propylene Glycol Monohydrate;Propylene Glycol Sodium Salt;Propylene Glycol, (+-)-Isomer;Propylene Glycol, (R)-Isomer;Propylene Glycol, (S)-Isomer

Monoisotopic Mass

76.052429g/mol

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

Refractive Index

[n]D/20: 1,431-1,433;Index of refraction: 1.4324 at 20 °C/D

Rotatable Bond Count

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.

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

MSDS

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COA

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