Boric acid
- Formula: BH3O3
- Molecular weight: 61.833
- IUPAC Standard InChI: InChI=1S/BH3O3/c2-1(3)4/h2-4H
- IUPAC Standard InChIKey: KGBXLFKZBHKPEV-UHFFFAOYSA-N
- CAS Registry Number: 10043-35-3
- 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: Orthoboric acid; H3-BO3; Boracic acid; Boric acid (BH3O3); Boric acid (H3BO3); Borofax; Boron hydroxide; Boron trihydroxide; NCI-C56417; Orthoboric acid (B(OH)3); Borsaure; Three elephant; Ant flip; Homberg's salt; B(OH)3; Basilit B; Dr.'s 1 Flea Terminator DF; Dr.'s 1 Flea Terminator DFPBO; Dr.'s 1 Flea Terminator DT; Dr.'s 1 Flea Terminator DTPBO; Flea Prufe; NSC 81726; Super Flea Eliminator; Trihydroxyborane; Acidum boricum (Salt/Mix); Bluboro (Salt/Mix); Collyrium Eye Wash (Salt/Mix); Collyrium Fresh-Eye Drops (Salt/Mix); component of Aci-Jel (Salt/Mix)
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Gas phase thermochemistry 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.
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°gas | -992.28 | kJ/mol | Review | Chase, 1998 | Data last reviewed in December, 1964 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°gas,1 bar | 295.23 | J/mol*K | Review | Chase, 1998 | Data last reviewed in December, 1964 |
Gas Phase Heat Capacity (Shomate Equation)
Cp° = A + B*t + C*t2 + D*t3 +
E/t2
H° − H°298.15= A*t + B*t2/2 +
C*t3/3 + D*t4/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t2/2 + D*t3/3 −
E/(2*t2) + G
Cp = heat capacity (J/mol*K)
H° = standard enthalpy (kJ/mol)
S° = standard entropy (J/mol*K)
t = temperature (K) / 1000.
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| Temperature (K) | 298. to 1200. | 1200. to 6000. |
|---|---|---|
| A | 22.91803 | 123.6309 |
| B | 182.0312 | 11.27103 |
| C | -125.7518 | -2.150124 |
| D | 34.68749 | 0.142479 |
| E | -0.145463 | -20.84674 |
| F | -1006.649 | -1075.104 |
| G | 273.1524 | 383.4117 |
| H | -992.2774 | -992.2774 |
| Reference | Chase, 1998 | Chase, 1998 |
| Comment | Data last reviewed in December, 1964 | Data last reviewed in December, 1964 |
Condensed phase thermochemistry 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.
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°solid | -1094.8 ± 0.8 | kJ/mol | Review | Cox, Wagman, et al., 1984 | CODATA Review value |
| ΔfH°solid | -1093.99 | kJ/mol | Review | Chase, 1998 | Data last reviewed in December, 1964 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°solid,1 bar | 89.95 ± 0.60 | J/mol*K | Review | Cox, Wagman, et al., 1984 | CODATA Review value |
| Quantity | Value | Units | Method | Reference | Comment |
| S°solid | 88.70 | J/mol*K | Review | Chase, 1998 | Data last reviewed in December, 1964 |
Solid Phase Heat Capacity (Shomate Equation)
Cp° = A + B*t + C*t2 + D*t3 +
E/t2
H° − H°298.15= A*t + B*t2/2 +
C*t3/3 + D*t4/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t2/2 + D*t3/3 −
E/(2*t2) + G
Cp = heat capacity (J/mol*K)
H° = standard enthalpy (kJ/mol)
S° = standard entropy (J/mol*K)
t = temperature (K) / 1000.
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| Temperature (K) | 298. to 1500. |
|---|---|
| A | 40.82396 |
| B | 195.2296 |
| C | -86.64855 |
| D | 13.60210 |
| E | -0.919735 |
| F | -1117.203 |
| G | 78.45126 |
| H | -1093.990 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in December, 1964 |
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 by: William E. Acree, Jr., James S. Chickos
Enthalpy of sublimation
| ΔsubH (kJ/mol) | Temperature (K) | Method | Reference | Comment |
|---|---|---|---|---|
| 174.1 ± 4.7 | 345. | GS | Pankajavalli, Anthonysamy, et al., 2007 | Based on data from 326. to 363. K. |
IR Spectrum
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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 by: Coblentz Society, Inc.
Condensed Phase Spectrum
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Notice: Except where noted, spectra from this collection were measured on dispersive instruments, often in carefully selected solvents, and hence may differ in detail from measurements on FTIR instruments or in other chemical environments. More information on the manner in which spectra in this collection were collected can be found here.
Notice: Concentration information is not available for this spectrum and, therefore, molar absorptivity values cannot be derived.
Additional Data
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| Owner | COBLENTZ SOCIETY Collection (C) 2018 copyright by the U.S. Secretary of Commerce on behalf of the United States of America. All rights reserved. |
|---|---|
| Origin | MELLON INSTITUTE |
| Source reference | COBLENTZ NO. 456 |
| Date | Not specified, most likely prior to 1970 |
| State | SOLID (NUJOL MULL) |
| Instrument | Not specified, most likely a prism, grating, or hybrid spectrometer. |
| Path length | SPECTRAL CONTAMINATION DUE TO OIL AROUND 2900 CM-1 |
| Resolution | 4 |
| Sampling procedure | TRANSMISSION |
| Data processing | DIGITIZED BY NIST FROM HARD COPY |
Mass spectrum (electron ionization)
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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 by: NIST Mass Spectrometry Data Center, William E. Wallace, director
Spectrum
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Additional Data
View image of digitized spectrum (can be printed in landscape orientation).
Due to licensing restrictions, this spectrum cannot be downloaded.
| Owner | NIST Mass Spectrometry Data Center Collection (C) 2014 copyright by the U.S. Secretary of Commerce on behalf of the United States of America. All rights reserved. |
|---|---|
| Origin | Chemical Concepts |
| NIST MS number | 158012 |
Vibrational and/or electronic energy levels
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, IR Spectrum, Mass spectrum (electron ionization), 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: Marilyn E. Jacox
State: X
| Vib. sym. |
No. | Approximate type of mode |
cm-1 | Med. | Method | References | |
|---|---|---|---|---|---|---|---|
| a' | 1 | OH stretch | 3705 | gas | Ra | Gilson, 1991 | |
| 2 | BOH deform. | 1020 | gas | Ra | Gilson, 1991 | ||
| 3 | BO stretch | 866 | gas | Ra | Gilson, 1991 | ||
| a | 4 | BO3 OPLA | 666.4 | Ar | IR | Andrews and Burkholder, 1992 | |
| 4 | BO3 OPLA | 675.0 | N2 | IR | Ogden and Young, 1988 | ||
| 5 | Torsion | 436.0 | Ar | IR | Andrews and Burkholder, 1992 | ||
| 5 | Torsion | 513.8 | N2 | IR | Ogden and Young, 1988 | ||
| e' | 6 | OH stretch | 3706 | gas | IR | Gilson, 1991 | |
| 6 | OH stretch | 3688.6 | Ar | IR | Andrews and Burkholder, 1992 | ||
| 6 | OH stretch | 3668.5 | N2 | IR | Ogden and Young, 1988 | ||
| 7 | BO stretch | 1429 | gas | IR | Gilson, 1991 | ||
| 7 | BO stretch | 1414.9 | Ar | IR | Andrews and Burkholder, 1992 | ||
| 7 | BO stretch | 1426.2 | N2 | IR | Ogden and Young, 1988 | ||
| 8 | HOB deform. | 1017 | gas | IR | Gilson, 1991 | ||
| 8 | HOB deform. | 992.4 | Ar | IR | Andrews and Burkholder, 1992 | ||
| 8 | HOB deform. | 1009.9 | N2 | IR | Ogden and Young, 1988 | ||
| 9 | BO2 deform. | 432.1 | Ar | IR | Andrews and Burkholder, 1992 | ||
| 9 | BO2 deform. | 448.9 | N2 | IR | Ogden and Young, 1988 | ||
| e | 10 | HOB deform. | 520 ± 5 | Ar | IR | Andrews and Burkholder, 1992 | |
Additional references: Jacox, 1998, page 326
References
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, IR Spectrum, Mass spectrum (electron ionization), Vibrational and/or electronic energy levels, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Chase, 1998
Chase, M.W., Jr.,
NIST-JANAF Themochemical Tables, Fourth Edition,
J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]
Cox, Wagman, et al., 1984
Cox, J.D.; Wagman, D.D.; Medvedev, V.A.,
CODATA Key Values for Thermodynamics, Hemisphere Publishing Corp., New York, 1984, 1. [all data]
Pankajavalli, Anthonysamy, et al., 2007
Pankajavalli, R.; Anthonysamy, S.; Ananthasivan, K.; Vasudeva Rao, P.R.,
Vapour pressure and standard enthalpy of sublimation of H3BO3,
Journal of Nuclear Materials, 2007, 362, 1, 128-131, https://doi.org/10.1016/j.jnucmat.2006.12.025
. [all data]
Gilson, 1991
Gilson, T.R.,
J. Chem. Soc., 1991, Dalton Trans. 2463. [all data]
Andrews and Burkholder, 1992
Andrews, L.; Burkholder, T.R.,
Infrared spectra of molecular B(OH)3 and HOBO in solid argon,
J. Chem. Phys., 1992, 97, 10, 7203, https://doi.org/10.1063/1.463545
. [all data]
Ogden and Young, 1988
Ogden, J.S.; Young, N.A.,
J. Chem. Soc., 1988, Dalton Trans. 1645. [all data]
Jacox, 1998
Jacox, M.E.,
Vibrational and electronic energy levels of polyatomic transient molecules: supplement A,
J. Phys. Chem. Ref. Data, 1998, 27, 2, 115-393, https://doi.org/10.1063/1.556017
. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, IR Spectrum, Mass spectrum (electron ionization), Vibrational and/or electronic energy levels, References
- Symbols used in this document:
S°gas,1 bar Entropy of gas at standard conditions (1 bar) S°solid Entropy of solid at standard conditions S°solid,1 bar Entropy of solid at standard conditions (1 bar) ΔfH°gas Enthalpy of formation of gas at standard conditions ΔfH°solid Enthalpy of formation of solid at standard conditions ΔsubH Enthalpy of sublimation - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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