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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Condensed phase thermochemistry data
Go To: Top, 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 | -501.0 ± 4.1 | kJ/mol | Ccb | Knauth and Sabbah, 1990 | ALS |
| ΔfH°liquid | -486. ± 3. | kJ/mol | Ccb | Gardner and Hussain, 1972 | ALS |
| ΔfH°liquid | -500.3 ± 1.8 | kJ/mol | Ccb | Moureu and Dode, 1937 | Reanalyzed by Cox and Pilcher, 1970, Original value = -499.2 kJ/mol; ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔcH°liquid | -1822.9 ± 4.1 | kJ/mol | Ccb | Knauth and Sabbah, 1990 | Corresponding ΔfHºliquid = -501.0 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS |
| ΔcH°liquid | -1838.1 ± 2.3 | kJ/mol | Ccb | Gardner and Hussain, 1972 | Corresponding ΔfHºliquid = -485.76 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS |
| ΔcH°liquid | -1823.5 ± 1.8 | kJ/mol | Ccb | Moureu and Dode, 1937 | Reanalyzed by Cox and Pilcher, 1970, Original value = -1824. kJ/mol; Corresponding ΔfHºliquid = -500.32 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS |
Constant pressure heat capacity of liquid
| Cp,liquid (J/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 189.9 | 298. | Zaripov, 1982 | T = 298, 323, 363 K.; DH |
| 177.0 | 303. | Kawaizumi, Otake, et al., 1972 | DH |
| 180.3 | 276.7 | Parks and Huffman, 1927 | T = 91 to 277 K. Value is unsmoothed experimental datum.; DH |
References
Go To: Top, Condensed phase 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]
Notes
Go To: Top, Condensed phase 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°liquid Enthalpy of formation of liquid at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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