Niacin
- Formula: C6H5NO2
- Molecular weight: 123.1094
- IUPAC Standard InChI: InChI=1S/C6H5NO2/c8-6(9)5-2-1-3-7-4-5/h1-4H,(H,8,9)
- IUPAC Standard InChIKey: PVNIIMVLHYAWGP-UHFFFAOYSA-N
- CAS Registry Number: 59-67-6
- 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. - Other names: 3-Pyridinecarboxylic acid; Nicotinic acid; Akotin; Apelagrin; Daskil; Efacin; Linic; Nicacid; Nicangin; Nico-Span; Nicodelmine; Nicolar; Niconacid; Nicosan 3; Nicotinipca; Nicyl; Nyclin; Pellagrin; Pelonin; Pyridine-β-carboxylic acid; 3-Carboxylpyridine; 3-Carboxypyridine; anti-Pellagra vitamin; Acidum nicotinicum; Bionic; Davitamon PP; Diacin; Direktan; Naotin; Niac; Nicamin; Nico-400; Nicobid; Nicocap; Nicocidin; Nicocrisina; Nicodan; Nicodon; Niconat; Niconazid; Nicorol; Nicoside; Nicosyl; Nicotamin; Nicotene; Nicotil; Nicotine acid; Nicotinsaure; Nicovasan; Nicovasen; Nicovel; Nipellen; NICO; P.P. factor-pellagra preventive factor; Pellagra preventive factor; Pellagramin; Peviton; Pyridine-3-carboxylic acid; PP Factor; SK-Niacin; S115; Tega-Span; Vitaplex N; Wampocap; Acide nicotinique; Kyselina nikotinova; NAH; Pyridine-carboxylique-3; Tinic; m-Pyridinecarboxylic acid; β-Pyridinecarboxylic acid; 3-Pyridylcarboxylic acid; Niacor; P.P. factor; Vitamin B3; Niaspan; Vitamin B5
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Condensed phase thermochemistry data
Go To: Top, Phase change 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
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°solid | -82.4 ± 0.2 | kcal/mol | Ccb | Bickerton, Pilcher, et al., 1984 | Author was aware that data differs from previously reported values |
| ΔfH°solid | -82.41 ± 0.22 | kcal/mol | Ccr | Sato-Toshima, Kamagughi, et al., 1983 | Author was aware that data differs from previously reported values |
| ΔfH°solid | -82.45 ± 0.16 | kcal/mol | Ccr | Johnson, 1975 | |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔcH°solid | -652.68 ± 0.11 | kcal/mol | Ccr | Sato-Toshima, Kamagughi, et al., 1983 | Author was aware that data differs from previously reported values |
| ΔcH°solid | -652.65 ± 0.14 | kcal/mol | Ccr | Johnson, 1975 |
Phase change data
Go To: Top, 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 as indicated in comments:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
AC - William E. Acree, Jr., James S. Chickos
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 |
|---|---|---|---|---|---|
| Tfus | 510.48 | K | N/A | Malaviolle, De Maury, et al., 1987 | Uncertainty assigned by TRC = 0.5 K; determined for various conditions and heating rates; TRC |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔsubH° | 29.61 ± 0.88 | kcal/mol | ME | Ribeiro da Silva, Gonçalves, et al., 2000 | Based on data from 352. to 360. K.; AC |
| ΔsubH° | 25.1 ± 0.1 | kcal/mol | N/A | Sabbah and Ider, 1999 | AC |
| ΔsubH° | 29.49 ± 0.29 | kcal/mol | C | Bickerton, Pilcher, et al., 1984 | Author was aware that data differs from previously reported values; ALS |
| ΔsubH° | 29.49 ± 0.29 | kcal/mol | C | Bickerton, Pilcher, et al., 1984 | AC |
Enthalpy of sublimation
| ΔsubH (kcal/mol) | Temperature (K) | Method | Reference | Comment |
|---|---|---|---|---|
| 21.3 | 473. to 498. | TG,DTA | Menon, Dollimore, et al., 2002 | AC |
| 24.2 ± 0.1 | 362. | C | Sabbah and Ider, 1999 | AC |
Enthalpy of fusion
| ΔfusH (kcal/mol) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 7.1702 | 510. | Allan, Geddes, et al., 1989 | DH |
| 6.589 | 509.1 | Wang, Tan, et al., 2004 | AC |
| 23.2 | 509.3 | Wang and Wang, 2004 | This value is considerably larger than values below—likely in error.; AC |
| 6.38 | 510. | El Moussaoui, Chauvet, et al., 1993 | AC |
Enthalpy of phase transition
| ΔHtrs (kcal/mol) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|---|
| 0.186 | 451.95 | crystaline, II | crystaline, I | El Moussaoui, Chauvet, et al., 1993, 2 | DH |
| 6.3815 | 509.75 | crystaline, I | liquid | El Moussaoui, Chauvet, et al., 1993, 2 | DH |
References
Go To: Top, Condensed phase thermochemistry data, Phase change data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Bickerton, Pilcher, et al., 1984
Bickerton, J.; Pilcher, G.; Al-Takhin, G.,
Enthalpies of combustion of the three aminopyridines and the three cyanopyridines,
J. Chem. Thermodyn., 1984, 16, 373-378. [all data]
Sato-Toshima, Kamagughi, et al., 1983
Sato-Toshima, T.; Kamagughi, A.; Nishiyama, K.; Sakiyama, M.; Seki, S.,
Enthalpies of combustion of organic compounds. IV. Acetaneilide and nicotinic acid,
Bull. Chem. Soc. Jpn., 1983, 56, 51-54. [all data]
Johnson, 1975
Johnson, W.H.,
The enthalpies of combustion and formation of nicotinic acid and creatinine,
J. Res. NBS, 1975, 79, 425-429. [all data]
Malaviolle, De Maury, et al., 1987
Malaviolle, R.; De Maury, G.; Chauvet, A.; Terol, A.; Masse, J.,
Study of the Binaries Khelline I - Nicotinic Acid and Khelline I - Nicotinamide,
Thermochim. Acta, 1987, 121, 283. [all data]
Ribeiro da Silva, Gonçalves, et al., 2000
Ribeiro da Silva, Maria D.M.C.; Gonçalves, Jorge M.; Acree, W.E., Jr.,
Standard molar enthalpy of sublimation of crystalline 3-pyridinecarboxylic acid,
The Journal of Chemical Thermodynamics, 2000, 32, 8, 1071-1073, https://doi.org/10.1006/jcht.2000.0675
. [all data]
Sabbah and Ider, 1999
Sabbah, Raphaël; Ider, Safi,
Energétique des liaisons inter- et intramoléculaires dans les trois acides carboxypyridiniques (acides picolinique, nicotinique et isonicotinique),
Revue canadienne de chimie, 1999, 77, 2, 249-257, https://doi.org/10.1139/cjc-77-2-249
. [all data]
Menon, Dollimore, et al., 2002
Menon, Divya; Dollimore, David; Alexander, Kenneth S.,
A TG--DTA study of the sublimation of nicotinic acid,
Thermochimica Acta, 2002, 392-393, 237-241, https://doi.org/10.1016/S0040-6031(02)00106-5
. [all data]
Allan, Geddes, et al., 1989
Allan, J.R.; Geddes, W.C.; Hindle, C.S.; Orr, A.E.,
Thermal analysis studies on pyridine carboxylic acid complexes of zinc(II),
Thermochim. Acta, 1989, 153, 249-256. [all data]
Wang, Tan, et al., 2004
Wang, S.X.; Tan, Z.C.; Di, Y.Y.; Xu, F.; Wang, M.H.; Sun, L.X.; Zhang, T.,
Calorimetric study and thermal analysis of crystalline nicotinic acid,
Journal of Thermal Analysis and Calorimetry, 2004, 76, 1, 335-342, https://doi.org/10.1023/B:JTAN.0000027833.24442.a0
. [all data]
Wang and Wang, 2004
Wang, Liu-Cheng; Wang, Fu-An,
Solubilities of niacin in sulfuric acid + water and 3-picoline + sulfuric acid + water from (292.65--361.35) K,
Fluid Phase Equilibria, 2004, 226, 289-293, https://doi.org/10.1016/j.fluid.2004.06.050
. [all data]
El Moussaoui, Chauvet, et al., 1993
El Moussaoui, A.; Chauvet, A.; Masse, J.,
Solid-state interaction of nordazepam-III and nicotinic-acid,
J. Therm. Anal., 1993, 39, 5, 619. [all data]
El Moussaoui, Chauvet, et al., 1993, 2
El Moussaoui, A.; Chauvet, A.; Masse, J.,
Study of the solid-state interactions of Nordazepam III-nicotinic acid binary,
J. Therm. Anal., 1993, 39(5), 619-632. [all data]
Notes
Go To: Top, Condensed phase thermochemistry data, Phase change data, References
- Symbols used in this document:
Tfus Fusion (melting) point ΔHtrs Enthalpy of phase transition ΔcH°solid Enthalpy of combustion of solid at standard conditions ΔfH°solid Enthalpy of formation of solid at standard conditions ΔfusH Enthalpy of fusion ΔsubH Enthalpy of sublimation ΔsubH° Enthalpy of sublimation at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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