Boric acid, trimethyl ester
- Formula: C3H9BO3
- Molecular weight: 103.913
- IUPAC Standard InChI: InChI=1S/C3H9BO3/c1-5-4(6-2)7-3/h1-3H3
- IUPAC Standard InChIKey: WRECIMRULFAWHA-UHFFFAOYSA-N
- CAS Registry Number: 121-43-7
- 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: Trimethoxyborane; Boric acid (H3BO3), trimethyl ester; Borester O; Methyl borate; Trimethoxyborine; Trimethoxyboron; Trimethyl borate; B(OCH3)3; Methyl borate, ((MeO)3B); Trimethylester kyseliny borite; UN 2416; NSC 777
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Phase change data
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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:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
AC - William E. Acree, Jr., James S. Chickos
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| Tboil | 341.99 | K | N/A | Owensby, Plank, et al., 1989 | Uncertainty assigned by TRC = 0.4 K; TRC |
| Tboil | 341.62 | K | N/A | Kraher, Plank, et al., 1986 | Uncertainty assigned by TRC = 0.2 K; TRC |
| Tboil | 341.8 | K | N/A | Schindler, Plank, et al., 1977 | Uncertainty assigned by TRC = 0.3 K; TRC |
| Tboil | 341.90 | K | N/A | Lecat, 1927 | Uncertainty assigned by TRC = 0.5 K; TRC |
| Quantity | Value | Units | Method | Reference | Comment |
| Tfus | 243.9 | K | N/A | Webster and Dennis, 1933 | Uncertainty assigned by TRC = 0.5 K; TRC |
| Tfus | 239.15 | K | N/A | Timmermans and Mattaar, 1921 | Uncertainty assigned by TRC = 0.5 K; TRC |
Enthalpy of vaporization
| ΔvapH (kJ/mol) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 34.2 | 319. | Christopher and Shilman, 1967 | Based on data from 304. - 340. K.; AC |
Antoine Equation Parameters
log10(P) = A − (B / (T + C))
P = vapor pressure (bar)
T = temperature (K)
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| Temperature (K) | A | B | C | Reference | Comment |
|---|---|---|---|---|---|
| 304.4 - 340.6 | 4.74371 | 1476.192 | -29.0 | Christopher and Shilman, 1967 | Coefficents calculated by NIST from author's data. |
References
Go To: Top, Phase change data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Owensby, Plank, et al., 1989
Owensby, G.S.; Plank, C.A.; Laukhuf, W.L.S.,
Vapor-Liquid Equilibria of the Trimethyl Borate(1)-Trichloroethylene (2) System,
J. Chem. Eng. Data, 1989, 34, 213. [all data]
Kraher, Plank, et al., 1986
Kraher, M.V.; Plank, C.A.; Laukhuf, W.L.S.,
Vapor-Liquid Equilibria of the System Trimethyl Borate(1) - n-Cyclohexane(2),
J. Chem. Eng. Data, 1986, 31, 387. [all data]
Schindler, Plank, et al., 1977
Schindler, L.E.; Plank, C.A.; Christopher, P.M.; Laukhuf, W.L.S.,
Vapor-liquid equilibria of the ternary system methyl borate + methyl alcohol + carbon tetrachloride,
J. Chem. Eng. Data, 1977, 22, 294-6. [all data]
Lecat, 1927
Lecat, M.,
New binary azeotropes: 6th list,
Ann. Soc. Sci. Bruxelles, Ser. B, 1927, 47, 63-71. [all data]
Webster and Dennis, 1933
Webster, S.H.; Dennis, L.M.,
Preparation and urification of Methyl BOrate and Ethyl BOrate,
J. Am. Chem. Soc., 1933, 55, 3233-5. [all data]
Timmermans and Mattaar, 1921
Timmermans, J.; Mattaar, J.F.,
Freezing points of orgainic substances VI. New experimental determinations.,
Bull. Soc. Chim. Belg., 1921, 30, 213. [all data]
Christopher and Shilman, 1967
Christopher, Phoebus M.; Shilman, Avner,
Vapor pressures of trialkyl borates,
J. Chem. Eng. Data, 1967, 12, 3, 333-335, https://doi.org/10.1021/je60034a012
. [all data]
Notes
Go To: Top, Phase change data, References
- Symbols used in this document:
Tboil Boiling point Tfus Fusion (melting) point ΔvapH Enthalpy of vaporization - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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