Thiopental

Formula: C₁₁H₁₈N₂O₂S
Molecular weight: 242.338
IUPAC Standard InChI: InChI=1S/C11H18N2O2S/c1-4-6-7(3)11(5-2)8(14)12-10(16)13-9(11)15/h7H,4-6H2,1-3H3,(H2,12,13,14,15,16)
IUPAC Standard InChIKey: IUJDSEJGGMCXSG-UHFFFAOYSA-N
CAS Registry Number: 76-75-5
Chemical structure:
This structure is also available as a 2d Mol file
Other names: 4,6(1H,5H)-Pyrimidinedione, 5-ethyldihydro-5-(1-methylbutyl)-2-thioxo-; Barbituric acid, 5-ethyl-5-(1-methylbutyl)-2-thio-; Intraval; Penthiobarbital; Pentothiobarbital; Thiomebumal; Thiopentobarbital; Thiopentone; Thiothal; 5-Ethyl-5-(1-methylbutyl)-2-thiobarbituric acid; Tiopentale; Thiopentobarbituric acid; Thiopentobarbitone; Thionembutal; 5-Ethyl-5-(1-methylbutyl)-2-thioxodihydro-4,6(1H,5H)-pyrimidinedione; (.+/-.)-Thiopental; 2-Thio-5-ethyl-5-sec-pentylbarbituric acid; 71-73-8; 7438-31-5
Permanent link for this species. Use this link for bookmarking this species for future reference.
Information on this page:
Other data available:
Options:
- Switch to calorie-based units

Data at NIST subscription sites:

NIST / TRC Web Thermo Tables, professional edition (thermophysical and thermochemical data)

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.

Gas Chromatography

Go To: Top, References, Notes

Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director

Kovats' RI, non-polar column, isothermal

View large format table.

Column type	Active phase	Temperature (C)	I	Reference	Comment
Capillary	BP-1	200.	1850.	Japp, Gill, et al., 1987	25. m/0.22 mm/0.25 μm, N2
Capillary	BP-1	200.	1855.	Japp, Gill, et al., 1987	25. m/0.53 mm/1. μm, N2
Packed	OV-1	200.	1855.	Berninger and Möller, 1977
Packed	OV-101	200.	1855.	Möller, 1976	N2, Chromosorb G AW DMCS (80-100 mesh); Column length: 2. m
Packed	OV-101	200.	1855.	Möller, 1976	N2, Chromosorb G AW DMCS (80-100 mesh); Column length: 2. m
Packed	OV-101	200.	1860.	Möller, 1976	N2, Chromosorb G AW DMCS (80-100 mesh); Column length: 2. m
Packed	OV-101	200.	1865.	Möller, 1976	N2, Chromosorb G AW DMCS (80-100 mesh); Column length: 2. m

Kovats' RI, non-polar column, temperature ramp

View large format table.

Column type	Active phase	I	Reference	Comment
Packed	SE-30	1855.	Maurer, 1990	N2, 100. C @ 3. min, 30. K/min, 310. C @ 5. min
Capillary	SE-30	1846.	Schepers, Wijsbeek, et al., 1982	25. m/0.49 mm/1.14 μm, 100. C @ 2. min, 8. K/min, 275. C @ 15. min

Van Den Dool and Kratz RI, non-polar column, temperature ramp

View large format table.

Column type	Active phase	I	Reference	Comment
Capillary	DB-1	1837.	Perrigo, Peel, et al., 1985	15. m/0.32 mm/0.25 μm, He, 8. K/min, 280. C @ 5. min; T_start: 120. C
Capillary	DB-1	1837.	Perrigo, Ballantyne, et al., 1984	15. m/0.25 mm/0.25 μm, He, 8. K/min, 280. C @ 5. min; T_start: 120. C
Packed	SE-30	1850.	Perrigo and Peel, 1981	N2, Chromosorb W, 130. C @ 2. min, 8. K/min, 290. C @ 8. min; Column length: 1.8 m

Normal alkane RI, non-polar column, isothermal

View large format table.

Column type	Active phase	Temperature (C)	I	Reference	Comment
Packed	OV-101	200.	1850.	Möller, 1976	N2, Chromosorb G AW DMCS (80-100 mesh); Column length: 2. m

Normal alkane RI, non-polar column, temperature ramp

View large format table.

Column type	Active phase	I	Reference	Comment
Capillary	DB-1	1842.	Sharp, 1987	15. m/0.25 mm/0.25 μm, He, 130. C @ 1. min, 10. K/min, 290. C @ 10. min
Packed	OV-1	1850.	Marozzi, Gambaro, et al., 1982	Gas Chrom P, 2.5 K/min; Column length: 2. m; T_start: 120. C; T_end: 200. C
Packed	SE-30	1840.	Marozzi, Gambaro, et al., 1982	Gas Chrom P, 2.5 K/min; Column length: 2. m; T_start: 120. C; T_end: 200. C

Normal alkane RI, non-polar column, custom temperature program

View large format table.

Column type	Active phase	I	Reference	Comment
Capillary	HP-1	1855.	Grigor'ev, Bozhko, et al., 2009	Helium; Program: not specified
Other	Methyl Silicone	1859.	Ardrey and Moffat, 1981	Program: not specified

References

Go To: Top, Gas Chromatography, Notes

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]

Möller, 1976
Möller, M.R., Comparability of retention indices of polar substances at elevated temperatures, Chromatographia, 1976, 9, 7, 311-314, https://doi.org/10.1007/BF02268832 . [all data]

Maurer, 1990
Maurer, H.H., Identification and differentiation of barbiturates, other sedative-hypnotics and their metabolites in urine integrated in a general screening procedure using computerized gas chromatography-mass spectrometry, J. Chromatogr., 1990, 530, 307-326, https://doi.org/10.1016/S0378-4347(00)82334-8 . [all data]

Schepers, Wijsbeek, et al., 1982
Schepers, P.; Wijsbeek, J.; Franke, J.P.; de Zeeuw, R.A., Applicability of capillary gas chromatography to substance identification in toxicology by means of retention indices, J. Forensic Sci., 1982, 27, 1, 49-60. [all data]

Perrigo, Peel, et al., 1985
Perrigo, B.J.; Peel, H.W.; Ballantyne, D.J., Use of Dual-Column Fused-Silica Capillary Gas Chromatography in Combination with Detector Response Factors for Analytical Toxicology., J. Chromatogr., 1985, 341, 81-88, https://doi.org/10.1016/S0378-4347(00)84011-6 . [all data]

Perrigo, Ballantyne, et al., 1984
Perrigo, B.J.; Ballantyne, D.J.; Peel, H.W., Condierations in developing a data base for drugs on a DBI capillary column, J. Can. Soc. Forensic Sci., 1984, 17, 2, 41-49, https://doi.org/10.1080/00085030.1984.10757360 . [all data]

Perrigo and Peel, 1981
Perrigo, B.J.; Peel, H.W., The use of retention indices and temperature-programmed gas chromatography in analytical toxicology, J. Chromatogr. Sci., 1981, 19, 5, 219-226, https://doi.org/10.1093/chromsci/19.5.219 . [all data]

Sharp, 1987
Sharp, M.E., A rapid screening procedure for acidic and neutral drugs in blood by high resolution gas chromatography, J. Anal. Toxicol., 1987, 11, 1, 8-11, https://doi.org/10.1093/jat/11.1.8 . [all data]

Marozzi, Gambaro, et al., 1982
Marozzi, E.; Gambaro, V.; Saligari, E.; Mariani, R.; Lodi, F., Use of the retention index in gas chromatographic studies of drugs, J. Anal. Toxicol., 1982, 6, 4, 185-192, https://doi.org/10.1093/jat/6.4.185 . [all data]

Grigor'ev, Bozhko, et al., 2009
Grigor'ev, A.M.; Bozhko, E.S.; Rudakova, L.V., Use of correlation between retention indices on low-polarity phases for screening comp-lex mixtures by gas chromatography-mass spectrometry, Rus. J. Anal. Chem., 2009, 64, 2, 140-143, https://doi.org/10.1134/S1061934809020087 . [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, Gas Chromatography, References

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.