Aspirin
- Formula: C9H8O4
- Molecular weight: 180.1574
- IUPAC Standard InChI: InChI=1S/C9H8O4/c1-6(10)13-8-5-3-2-4-7(8)9(11)12/h2-5H,1H3,(H,11,12)
- IUPAC Standard InChIKey: BSYNRYMUTXBXSQ-UHFFFAOYSA-N
- CAS Registry Number: 50-78-2
- 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: Benzoic acid, 2-(acetyloxy)-; Salicylic acid acetate; o-Acetoxybenzoic acid; o-Carboxyphenyl acetate; A.S.A.; A.S.A. Empirin; Acenterine; Acesal; Acetal; Aceticyl; Acetilum Acidulatum; Acetisal; Acetol; Acetophen; Acetosal; Acetosalic acid; Acetosalin; Acetylin; Acetylsal; Acetylsalicylic acid; Acidum acetylsalicylicum; Acisal; Acylpyrin; Asagran; Aspro; Asteric; AC 5230; ASA; Benaspir; Bialpirina; Colfarit; Dolean PH 8; Duramax; Ecotrin; Empirin; Endydol; Enterophen; Enterosarein; Enterosarine; Globentyl; Globoid; Helicon; Idragin; Measurin; Neuronika; Novid; Polopiryna; Rheumintabletten; Rhodine; Rhonal; Salacetin; Salcetogen; Saletin; SP 189; Temperal; Triple-Sal; Xaxa; Yasta; 2-(Acetyloxy)benzoic acid; 2-Acetoxybenzoic acid; 2-Carboxyphenyl acetate; O-acetylsalicylic acid; Acetonyl; Acetylsalicylsaure; Acide acetylsalicylique; Adiro; Aspec; Aspergum; Aspirdrops; Aspirine; Bi-prin; Cemirit; Claradin; Clariprin; Crystar; Decaten; Ecolen; Entericin; Extren; ECM; Levius; Micristin; Pharmacin; Pirseal; Premaspin; S-211; Solfrin; Solprin acid; Spira-Dine; St. Joseph; Acetilsalicilico; Acido acetilsalicilico; Acimetten; Acido O-acetil-benzoico; Asatard; Aspalon; Bialpirinia; Caprin; Contrheuma retard; Delgesic; Entrophen; Kyselina 2-acetoxybenzoova; Kyselina acetylsalicylova; Solpyron; Bayer; Bufferin; Easprin; St. Joseph Aspirin for Adults; 2-Acetylsalicyclic acid; Ascoden-30; Coricidin; Nu-seals; Nu-seals aspirin; Persistin; Supac; Tasprin; Triaminicin; Salicylic acid, acetyl-; o-(Acetyloxy)benzoic acid; Zorprin; Magnecyl; Miniasal; Colsprin; Acesan; Acetard; Ascolong; Aspropharm; Salycylacetylsalicylic acid; Kapsazal
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Phase change data
Go To: Top, Mass spectrum (electron ionization), Gas Chromatography, 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
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| Tfus | 405. ± 10. | K | AVG | N/A | Average of 103 out of 110 values; Individual data points |
Enthalpy of fusion
| ΔfusH (kcal/mol) | Temperature (K) | Method | Reference | Comment |
|---|---|---|---|---|
| 6.972 | 409.2 | DSC | Xu, Sun, et al., 2004 | AC |
| 7.412 | 412.7 | DSC | Perlovich and Bauer-Brandl, 2001 | See also Perlovich and Bauer-Brandl, 2003.; AC |
| 7.12 | 414. | N/A | Kirklin, 2000 | AC |
Mass spectrum (electron ionization)
Go To: Top, Phase change data, Gas Chromatography, 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: NIST Mass Spectrometry Data Center, William E. Wallace, director
Spectrum
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Additional Data
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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 | Virginia Division of Forensic Science |
| NIST MS number | 250572 |
Gas Chromatography
Go To: Top, Phase change data, 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: NIST Mass Spectrometry Data Center, William E. Wallace, director
Kovats' RI, non-polar column, isothermal
| Column type | Active phase | Temperature (C) | I | Reference | Comment |
|---|---|---|---|---|---|
| Capillary | DB-1 | 130. | 1270. | Japp, Gill, et al., 1987 | 30. m/0.53 mm/1.5 μm, N2 |
| Packed | OV-1 | 150. | 1315. | Berninger and Möller, 1977 |
Normal alkane RI, non-polar column, custom temperature program
| Column type | Active phase | I | Reference | Comment |
|---|---|---|---|---|
| Capillary | Polydimethyl siloxanes | 1309. | Schutz and Wollrab A., 1988 | Program: not specified |
| Other | Methyl Silicone | 1309. | Ardrey and Moffat, 1981 | Program: not specified |
References
Go To: Top, Phase change data, Mass spectrum (electron ionization), Gas Chromatography, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Xu, Sun, et al., 2004
Xu, F.; Sun, L.-X.; Tan, Z.-C.; Liang, J.-G.; Zhou, D.-H.; Di, Y.-Y.; Lan, X.Z.; Zhang, T.,
Wuji Huaxue Xuebao, 2004, 20, 1, 50. [all data]
Perlovich and Bauer-Brandl, 2001
Perlovich, G.L.; Bauer-Brandl, A.,
Organometallics, 2001, 63, 3, 653-661, https://doi.org/10.1023/A:1010119532614
. [all data]
Perlovich and Bauer-Brandl, 2003
Perlovich, German L.; Bauer-Brandl, Annette,
Pharmaceutical Research, 2003, 20, 3, 471-478, https://doi.org/10.1023/A:1022624725495
. [all data]
Kirklin, 2000
Kirklin, Duane R.,
Enthalpy of combustion of acetylsalicylic acid,
The Journal of Chemical Thermodynamics, 2000, 32, 6, 701-709, https://doi.org/10.1006/jcht.1999.0650
. [all data]
Japp, Gill, et al., 1987
Japp, M.; Gill, R.; Osselton, M.D.,
Comparison of drug retention indices determined on packed, wide bore capillary and narrow bore capillary columns,
J. Forensic Sci., 1987, 32, 6, 1574-1586. [all data]
Berninger and Möller, 1977
Berninger, H.; Möller, M.R.,
Retentionsindices zur gaschromatographischen Identifizierung von Arzneimitteln,
Arch. Toxicol., 1977, 37, 4, 295-305, https://doi.org/10.1007/BF00330821
. [all data]
Schutz and Wollrab A., 1988
Schutz, H.; Wollrab A.,
The significance of the retention index in toxicologic analysis II,
Pharmazie in unzerer Zeit, 1988, 17, 4, 97-101. [all data]
Ardrey and Moffat, 1981
Ardrey, R.E.; Moffat, A.C.,
Gas-liquid chromatographic retention indices of 1318 substances of toxicological interest on SE-30 or OV-1 stationary phase,
J. Chromatogr., 1981, 220, 3, 195-252, https://doi.org/10.1016/S0021-9673(00)81925-1
. [all data]
Notes
Go To: Top, Phase change data, Mass spectrum (electron ionization), Gas Chromatography, References
- Symbols used in this document:
Tfus Fusion (melting) point ΔfusH Enthalpy of fusion - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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