Pentane, 2,2,4-trimethyl-
- Formula: C8H18
- Molecular weight: 114.2285
- IUPAC Standard InChI: InChI=1S/C8H18/c1-7(2)6-8(3,4)5/h7H,6H2,1-5H3
- IUPAC Standard InChIKey: NHTMVDHEPJAVLT-UHFFFAOYSA-N
- CAS Registry Number: 540-84-1
- 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. - Other names: Isooctane; Isobutyltrimethylmethane; 2,2,4-Trimethylpentane; (CH3)2CHCH2C(CH3)3; Isobutyltrimethylethane; UN 1262
- Permanent link for this species. Use this link for bookmarking this species for future reference.
- Information on this page:
- Other data available:
- Data at other public NIST sites:
- Options:
Data at NIST subscription sites:
NIST subscription sites provide data under the NIST Standard Reference Data Program, but require an annual fee to access. The purpose of the fee is to recover costs associated with the development of data collections included in such sites. Your institution may already be a subscriber. Follow the links above to find out more about the data in these sites and their terms of usage.
Normal melting point
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 by: Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
| Tfus (K) | Reference | Comment |
|---|---|---|
| 165.78 | Battino and Allison, 1966 | Uncertainty assigned by TRC = 0.1 K; TRC |
| 165.750 | Anonymous, 1959 | Uncertainty assigned by TRC = 0.04 K; TRC |
| 165.760 | Anonymous, 1959 | Uncertainty assigned by TRC = 0.02 K; TRC |
| 165.750 | Anonymous, 1959 | Uncertainty assigned by TRC = 0.02 K; TRC |
| 165.76 | Mueller and Lewis, 1957 | Uncertainty assigned by TRC = 0.02 K; TRC |
| 165.73 | Crawford and Harbourn, 1955 | Uncertainty assigned by TRC = 0.1 K; TRC |
| 165.73 | Crawford and Harbourn, 1955 | Uncertainty assigned by TRC = 0.1 K; TRC |
| 165.73 | Crawford and Harbourn, 1955 | Uncertainty assigned by TRC = 0.1 K; TRC |
| 165.73 | Crawford and Harbourn, 1955 | Uncertainty assigned by TRC = 0.06 K; TRC |
| 165.73 | Crawford and Harbourn, 1955 | Uncertainty assigned by TRC = 0.06 K; TRC |
| 165.73 | Crawford and Harbourn, 1955 | Uncertainty assigned by TRC = 0.06 K; TRC |
| 165.77 | Crawford and Harbourn, 1955 | Uncertainty assigned by TRC = 0.09 K; TRC |
| 165.77 | Crawford and Harbourn, 1955 | Uncertainty assigned by TRC = 0.05 K; TRC |
| 165.76 | Pomerantz, 1952 | Uncertainty assigned by TRC = 0.06 K; TRC |
| 165.76 | Pomerantz, 1952 | Uncertainty assigned by TRC = 0.03 K; TRC |
| 165.85 | Timmermans, 1952 | Uncertainty assigned by TRC = 0.2 K; TRC |
| 165.73 | Anonymous, 1951 | Uncertainty assigned by TRC = 0.1 K; TRC |
| 165.76 | Anonymous, 1951 | Uncertainty assigned by TRC = 0.06 K; TRC |
| 165.75 | Kay and Warzel, 1951 | Uncertainty assigned by TRC = 0.15 K; TRC |
| 165.76 | Anonymous, 1950 | Uncertainty assigned by TRC = 0.03 K; TRC |
| 165.77 | Anonymous, 1950 | Uncertainty assigned by TRC = 0.02 K; TRC |
| 165.730 | Denyer, Fidler, et al., 1949 | Uncertainty assigned by TRC = 0.15 K; TRC |
| 165.75 | LeTourneau and Matteson, 1948 | Uncertainty assigned by TRC = 0.3 K; TRC |
| 165.75 | Streiff, Zimmerman, et al., 1948 | Uncertainty assigned by TRC = 0.12 K; TRC |
| 165.77 | Streiff, Zimmerman, et al., 1948 | Uncertainty assigned by TRC = 0.05 K; TRC |
| 165.78 | Streiff, Zimmerman, et al., 1948, 2 | Uncertainty assigned by TRC = 0.03 K; TRC |
| 165.75 | Streiff, 1947 | Uncertainty assigned by TRC = 0.04 K; TRC |
| 165.77 | Streiff, 1947 | Uncertainty assigned by TRC = 0.02 K; TRC |
| 165.78 | Anonymous, 1946 | Uncertainty assigned by TRC = 0.2 K; TRC |
| 165.75 | Forziati, Glasgow, et al., 1946 | Uncertainty assigned by TRC = 0.01 K; TRC |
| 165.83 | Fidler, 1945 | Uncertainty assigned by TRC = 0.3 K; TRC |
| 165.83 | Anonymous, 1944 | Uncertainty assigned by TRC = 0.3 K; TRC |
| 165.75 | Rank, Scott, et al., 1942 | Uncertainty assigned by TRC = 0.5 K; TRC |
| 165.78 | Anonymous, 1941 | Uncertainty assigned by TRC = 0.2 K; TRC |
| 165.78 | Brooks, Howard, et al., 1940 | Uncertainty assigned by TRC = 0.07 K; TRC |
| 165.55 | Wibaut, Hoog, et al., 1939 | Uncertainty assigned by TRC = 0.4 K; TRC; Data excluded from overall average |
| 165.83 | Brooks, 1938 | Uncertainty assigned by TRC = 0.2 K; TRC |
| 165.55 | Smittenberg, Hoog, et al., 1938 | Uncertainty assigned by TRC = 0.2 K; TRC; Data excluded from overall average |
| 165.84 | Smith and Matheson, 1938 | Uncertainty assigned by TRC = 0.06 K; TRC |
| 166.15 | Leslie and Heuer, 1937 | Uncertainty assigned by TRC = 2. K; TRC; Data excluded from overall average |
| 165. | Timmermans, 1935 | Uncertainty assigned by TRC = 2. K; TRC; Data excluded from overall average |
| 165.65 | Bromiley and Quiggle, 1933 | Uncertainty assigned by TRC = 0.5 K; TRC; Data excluded from overall average |
| 165.45 | Tongberg, Pickens, et al., 1932 | Uncertainty assigned by TRC = 0.4 K; TRC; Data excluded from overall average |
| 165.35 | Parks and Huffman, 1931 | Uncertainty assigned by TRC = 0.5 K; TRC; Data excluded from overall average |
References
Go To: Top, Normal melting point, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Battino and Allison, 1966
Battino, R.; Allison, G.W.,
Thermodynamics of Binary Solutions of Nonelectrolytes with 2,2,4-Trimethyl- pentane II. Phase Equilibrium Study with Cyclohexane and a New Cooling Curve Apparatus,
J. Phys. Chem., 1966, 70, 3417. [all data]
Anonymous, 1959
Anonymous, R.,
, Am. Pet. Inst. Res. Proj. 6, Carnegie-Mellon Univ., 1959. [all data]
Mueller and Lewis, 1957
Mueller, C.R.; Lewis, J.E.,
Thermodynamic Properties of the System Iso-Octane and Perfluoroheptane perfluoroheptane,
J. Chem. Phys., 1957, 26, 286-92. [all data]
Crawford and Harbourn, 1955
Crawford, W.; Harbourn, C.L.A.,
Anal. Chem., 1955, 27, 1449. [all data]
Pomerantz, 1952
Pomerantz, P.,
Synthesis and physical properties of n-heptane and 2,2,4-trimethylpentane,
J. Res. Natl. Bur. Stand. (U. S.), 1952, 48, 76-81. [all data]
Timmermans, 1952
Timmermans, J.,
Freezing points of organic compounds. VVI New determinations.,
Bull. Soc. Chim. Belg., 1952, 61, 393. [all data]
Anonymous, 1951
Anonymous, R.,
, Sunbury Rep. No. 4199, Anglo-Iranian Oil Co., 1951. [all data]
Kay and Warzel, 1951
Kay, W.B.; Warzel, F.M.,
2,2,4-Trimethylpentane (Isooctane), Vapor Pressure, Critical Constants and Saturated Vapor and Liquid Densities,
Ind. Eng. Chem., 1951, 43, 1150-2. [all data]
Anonymous, 1950
Anonymous, R.,
, Am. Pet. Inst. Res. Proj. 6, Natl. Bur. Stand., 1950. [all data]
Denyer, Fidler, et al., 1949
Denyer, R.L.; Fidler, F.A.; Lowry, R.A.,
Azeotrope Formation Between Thiols and Hydrocarbons,
Ind. Eng. Chem., 1949, 41, 2727-37. [all data]
LeTourneau and Matteson, 1948
LeTourneau, R.L.; Matteson, R.,
Measurement of Heat of Combustion of Volatile Hydrocarbons. Liquid Sample Holder,
Anal. Chem., 1948, 20, 663. [all data]
Streiff, Zimmerman, et al., 1948
Streiff, A.J.; Zimmerman, J.C.; Soule, L.F.; Butt, M.T.; Sedlak, V.A.; Willingham, C.B.; Rossini, F.D.,
, Am. Pet. Inst. Res. Proj. 6 unpublished, 1948. [all data]
Streiff, Zimmerman, et al., 1948, 2
Streiff, A.J.; Zimmerman, J.C.; Soule, L.F.; Butt, M.T.; Sedlak, V.A.; Willingham, C.B.; Rossini, F.D.,
Purification, Purity, and Freezing Points of 30 Hydrocarbons of the API-Standard and API-NBS Series,
J. Res. Natl. Bur. Stand. (U. S.), 1948, 41, 323. [all data]
Streiff, 1947
Streiff, A.J.,
, Am. Pet. Inst. Res. Proj. 6, Carnegie-Mellon Univ., 1947. [all data]
Anonymous, 1946
Anonymous, R.,
, Am. Pet. Inst. Res. Proj. 45, Ohio State Univ., 1946. [all data]
Forziati, Glasgow, et al., 1946
Forziati, A.F.; Glasgow, A.R.; Willingham, C.B.; Rossini, F.D.,
Specification adn Properties of 29 Paraffin, 4 Alkylcyclopentanes, 10 Alkylcyclohexanes and 8 Alkylbenzene Hydrocarbons,
J. Res. Natl. Bur. Stand. (U. S.), 1946, 36, 129. [all data]
Fidler, 1945
Fidler, F.A.,
, Sunbury Rep. No. 2731, Anglo-Iranian Oil Co., 1945. [all data]
Anonymous, 1944
Anonymous, R.,
, Sunbury Rep., Anglo-Iranian Oil Co., March 22, 1944. [all data]
Rank, Scott, et al., 1942
Rank, D.H.; Scott, R.W.; Fenske, M.R.,
Qualitive and quantitative analysis of hydrocarbon mixtures,
Anal. Chem., 1942, 14, 816. [all data]
Anonymous, 1941
Anonymous, R.,
, Am. Pet. Inst. Hydrocarbon Res. Proj., Third Annu. Rep., Ohio State Univ., Aug. 31, 1941. [all data]
Brooks, Howard, et al., 1940
Brooks, D.B.; Howard, F.L.; Crafton, H.C.,
Physical Properties of Some Purified Aliphatic Hydrocarbons,
J. Res. Natl. Bur. Stand. (U. S.), 1940, 24, 33. [all data]
Wibaut, Hoog, et al., 1939
Wibaut, J.P.; Hoog, H.; Langedijk, S.L.; Overhoff, J.; Smittenberg, J.; Benninga, N.; Bouman, G.P.; van Dijk, H.; Gaade, W.; Geldof, H.; Hackmann, J.Th.; Jonker, E.W.; Paap, T.; Zuiderweg, F.J.,
Study on the Preparation and the Physical Constants of A Number of Alkanes and Cycloalkanes,
Recl. Trav. Chim. Pays-Bas, 1939, 58, 329. [all data]
Brooks, 1938
Brooks, D.B.,
Properties of purified normal heptane and isooctane (2,2,4- trimethylpentane),
J. Res. Natl. Bur. Stand. (U. S.), 1938, 21, 847. [all data]
Smittenberg, Hoog, et al., 1938
Smittenberg, J.; Hoog, H.; Henkes, R.A.,
Freezing Points of A Number of Pure Hydrocarbons of the Gasoline Boiling Range and of Some of their Binary Mixtures,
J. Am. Chem. Soc., 1938, 60, 17. [all data]
Smith and Matheson, 1938
Smith, E.R.; Matheson, H.,
Boiling Points of Benzene, Ethylene Chloride, n-Heptane, and 2,2,4-Tri- methylpentane Over the Range 660- to 860-MM Pressure,
J. Res. Natl. Bur. Stand. (U. S.), 1938, 20, 641. [all data]
Leslie and Heuer, 1937
Leslie, R.T.; Heuer, W.W.,
Study of the Crystal Behavior of Hydrocarbons,
J. Res. Natl. Bur. Stand. (U. S.), 1937, 18, 639. [all data]
Timmermans, 1935
Timmermans, J.,
Researches in Stoichiometry. I. The Heat of Fusion of Organic Compounds.,
Bull. Soc. Chim. Belg., 1935, 44, 17-40. [all data]
Bromiley and Quiggle, 1933
Bromiley, E.C.; Quiggle, D.,
Ind. Eng. Chem., 1933, 25, 1136. [all data]
Tongberg, Pickens, et al., 1932
Tongberg, C.O.; Pickens, J.D.; Fenske, M.R.; Whitmore, F.C.,
The Isomers in "Diisobutylene". II.,
J. Am. Chem. Soc., 1932, 54, 3706-10. [all data]
Parks and Huffman, 1931
Parks, G.S.; Huffman, H.M.,
Some fusion and transition data for hydrocarbons,
Ind. Eng. Chem., 1931, 23, 1138-9. [all data]
Notes
Go To: Top, Normal melting point, References
- Symbols used in this document:
Tfus Fusion (melting) point - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
- The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database.
- Customer support for NIST Standard Reference Data products.