Propylene Glycol
- Formula: C3H8O2
- Molecular weight: 76.0944
- IUPAC Standard InChI: InChI=1S/C3H8O2/c1-3(5)2-4/h3-5H,2H2,1H3
- IUPAC Standard InChIKey: DNIAPMSPPWPWGF-UHFFFAOYSA-N
- CAS Registry Number: 57-55-6
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript. - Species with the same structure:
- Stereoisomers:
- Other names: 1,2-Propanediol; α-Propylene glycol; Methylethyl glycol; Methylethylene glycol; Monopropylene glycol; PG 12; Sirlene; 1,2-Dihydroxypropane; 1,2-Propylene glycol; 2-Hydroxypropanol; 2,3-Propanediol; Propane-1,2-diol; Dowfrost; Propylene glycol USP; 1,2-Propylenglykol; Solar winter ban; Sentry Propylene Glycol; Isopropylene glycol; Ucar 35; Solargard P; Ilexan P; Prolugen; Trimethyl glycol; 1,2-Propandiol; Propylenglycol; (RS)-1,2-Propanediol; (.+/-.)-1,2-Propanediol; DL-1,2-Propanediol; NSC 69860; DL-Propylene glycol; propylene glycol (1,2-propanediol); 1,2-propanediol (propylene glycol); propanediol; Methyl glycol
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- Other data available:
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Gas phase thermochemistry data
Go To: Top, Condensed phase thermochemistry data, Reaction thermochemistry data, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled as indicated in comments:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DRB - Donald R. Burgess, Jr.
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°gas | -102.7 ± 0.98 | kcal/mol | Ccb | Knauth and Sabbah, 1990 | ALS |
| ΔfH°gas | -100.7 ± 0.8 | kcal/mol | Ccb | Gardner and Hussain, 1972 | ALS |
| ΔfH°gas | -104.0 | kcal/mol | N/A | Moureu and Dode, 1937 | Value computed using ΔfHliquid° value of -500.3±1.8 kj/mol from Moureu and Dode, 1937 and ΔvapH° value of 65.0 kj/mol from Gardner and Hussain, 1972.; DRB |
Condensed phase thermochemistry data
Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled as indicated in comments:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DH - Eugene S. Domalski and Elizabeth D. Hearing
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°liquid | -119.7 ± 0.98 | kcal/mol | Ccb | Knauth and Sabbah, 1990 | ALS |
| ΔfH°liquid | -116.1 ± 0.6 | kcal/mol | Ccb | Gardner and Hussain, 1972 | ALS |
| ΔfH°liquid | -119.58 ± 0.44 | kcal/mol | Ccb | Moureu and Dode, 1937 | Reanalyzed by Cox and Pilcher, 1970, Original value = -119.3 kcal/mol; ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔcH°liquid | -435.68 ± 0.98 | kcal/mol | Ccb | Knauth and Sabbah, 1990 | Corresponding ΔfHºliquid = -119.7 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS |
| ΔcH°liquid | -439.31 ± 0.54 | kcal/mol | Ccb | Gardner and Hussain, 1972 | Corresponding ΔfHºliquid = -116.10 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS |
| ΔcH°liquid | -435.83 ± 0.44 | kcal/mol | Ccb | Moureu and Dode, 1937 | Reanalyzed by Cox and Pilcher, 1970, Original value = -435.9 kcal/mol; Corresponding ΔfHºliquid = -119.58 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS |
Constant pressure heat capacity of liquid
| Cp,liquid (cal/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 45.39 | 298. | Zaripov, 1982 | T = 298, 323, 363 K.; DH |
| 42.30 | 303. | Kawaizumi, Otake, et al., 1972 | DH |
| 43.09 | 276.7 | Parks and Huffman, 1927 | T = 91 to 277 K. Value is unsmoothed experimental datum.; DH |
Reaction thermochemistry data
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled by: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.
Individual Reactions
+
=
+
By formula: C3H8O2 + C3H6O = C6H12O2 + H2O
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | -0.8 | kcal/mol | Eqk | Anteunis and Rommelaere, 1970 | liquid phase |
+ 2
=
+
By formula: C4H6O3 + 2CH4O = C3H8O2 + C3H6O3
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | -1.66 | kcal/mol | Kin | Zhang and Luo, 1991 | liquid phase |
References
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction thermochemistry data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Knauth and Sabbah, 1990
Knauth, P.; Sabbah, R.,
Energetics of inter- and intramolecular bonds in alkanediols. IV. The thermochemical study of 1,2-alkanediols at 298.15 K,
Thermochim. Acta, 1990, 164, 145-152. [all data]
Gardner and Hussain, 1972
Gardner, P.J.; Hussain, K.S.,
The standard enthalpies of formation of some aliphatic diols,
J. Chem. Thermodyn., 1972, 4, 819-827. [all data]
Moureu and Dode, 1937
Moureu, H.; Dode, M.,
Chaleurs de formation de l'oxyde d'ethylene, de l'ethanediol et de quelques homologues,
Bull. Soc. Chim. France, 1937, 4, 637-647. [all data]
Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G.,
Thermochemistry of Organic and Organometallic Compounds, Academic Press, New York, 1970, 1-636. [all data]
Zaripov, 1982
Zaripov, Z.I.,
Experimental study of the isobaric heat capacity of liquid organic compounds with molecular weights of up to 4000 a.e.m., 1982, Teplomassoobmen Teplofiz. [all data]
Kawaizumi, Otake, et al., 1972
Kawaizumi, F.; Otake, T.; Nomura, H.; Miyahara, Y.,
Heat capacities of aqueous solutions of ethylene glycol, propylene glycol and 1,3-butanediol,
Nippon Kagaku. Kaishi, 1972, 1972, 1733-1776. [all data]
Parks and Huffman, 1927
Parks, G.S.; Huffman, H.M.,
Studies on glass. I. The transition between the glassy and liquid states in the case of some simple organic compounds,
J. Phys. Chem., 1927, 31, 1842-1855. [all data]
Anteunis and Rommelaere, 1970
Anteunis, M.; Rommelaere, Y.,
NMR experiments on acetals. XXIX. The ease of acetonide formation of some glycols,
Bull. Soc. Chim. Belg., 1970, 79, 523-530. [all data]
Zhang and Luo, 1991
Zhang, S.; Luo, Y.,
Kinetics and technological conditions for the synthesis of dimethyl carbonate,
Chem. React. Eng. Tech., 1991, 7, 10-19. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction thermochemistry data, References
- Symbols used in this document:
Cp,liquid Constant pressure heat capacity of liquid ΔcH°liquid Enthalpy of combustion of liquid at standard conditions ΔfH°gas Enthalpy of formation of gas at standard conditions ΔfH°liquid Enthalpy of formation of liquid at standard conditions ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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