An official website of the United States government.

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

Plant Allium cepa (Liliaceae)

Common Names
Onion; Shallot
How this plant is used
Food
View the list of ubiquitous chemicals
List of plant chemicals.
Click on column headings to sort table by that column. *Unless otherwise noted all references are to (Duke, 1992)
Chemical Name Activity Count Plant Part Low Parts Per Million High Parts Per Million Standard Deviation Reference
THIOPROPANAL-S-OXIDE 0 Bulb not available not available not available Duke, 1992 *
THIOPROPIONAL-S-OXIDE 0 Bulb not available not available not available Duke, 1992 *
THREONINE 4 Bulb 280.0 3052.0 -1.00 USDA's Ag Handbook 8 and sequelae)
TITANIUM 0 Bulb 0.4 11.0 not available USDA's Ag Handbook 8 and sequelae)
TRANS-1-(1-PROPENYL-DITHIO)-PROPANE 0 Essential Oil not available not available not available Albrand, M., Dubois, P., Etievant, P., Gelin, R., Tokarska, B. 1980. Identification of a New Volatile Compound in Onion (Allium cepa) and Leek (Allium porum): 3,4-dimethyl-2,5-dioxo-2,5-dihydrothiophene. J. Agric. Food Chem., 28(5): 1037-1038.
TRANS-1-(PROPENYL-DITHIO)-PROPANE 0 Essential Oil not available not available not available Duke, 1992 *
TRANS-2,3-DIMETHYL-5,6-DITHIA-CYCLO(2,2,1)HEPTANE-5-OXIDE 0 Bulb not available not available not available Dorsch,W.,et.al.1988.Anti-Asthmatic Effects of Onions. Alk(en)ylsufinothoic Acid Alk(en)yl-Esters Inhib. Histamine Rel. Leukotriene & Thromboxane Biosyn. in Vitro and Counteract PAF & Allergen-Ind. Bronch. Obst. in Vivo. Biochem. Pharmacol., 37:4479-4486.
TRANS-3,5-DIETHYL-1,2,4,-TRITHIOLANE 0 Leaf not available not available not available Chemical Constituents of Oriental Herbs (3 diff. books)
TRANS-5-ETHYL-4,6,7-TRITHIA-2-DECENE-4-S-OXIDE 4 Bulb not available not available not available Duke, 1992 *
TRANS-CIS-5-ETHYL-4,6,7-TRITHIA-2,8-DECADIENE-4-S-OXIDE 0 Bulb not available not available not available Duke, 1992 *
TRANS-METHYLSULPHINOTHIOIC-ACID-S-1-PROPENYLESTER 4 Bulb not available not available not available Duke, 1992 *
TRANS-N-PROPYLSULPHINOTHIOIC-ACID-S-1-PROPENYLESTER 4 Bulb not available not available not available Duke, 1992 *
TRANS-S-(1-PROPENYL)-CYSTEINE-SULFOXIDE 0 Bulb not available not available not available Williamson, E. M. and Evans, F. J., Potter's New Cyclopaedia of Botanical Drugs and Preparations, Revised Ed., Saffron Walden, the C. W. Daniel Co., Ltd., Essex UK, 362 pp, 1988, reprint 1989.
TRANS-TRANS-5-ETHYL-4,6,7-TRITHIA-2,8-DECADIENE-4-S-OXIDE 4 Bulb not available not available not available Duke, 1992 *
TRIDECAN-2-ONE 0 Bulb not available not available not available Wealth of India.
TRIGONELLINE 15 Seed not available 13.0 -0.47 Evans, L. S., Tramontano, W. A. 1984. Trigonelline and Promotion of Cell Arrest in G2 of Various Legumes. Phytochemistry, 23(9): 1837-1840.
TRYPTOPHAN 29 Bulb 170.0 1853.0 1.00 USDA's Ag Handbook 8 and sequelae)
TSEPOSIDES 0 Seed not available not available not available Kintia, P. K., Degtiaryova, L. P., Balashova, N. N., Shvets, S. A. 1987. Sterols and Steroidal Glycosides of Bulb Onion Seeds. Fecs. Int. Conf. Chem. Biotechol. Biol. Act. Nat. Prod., (Proc.) 3rd: 166-170.
TULIPOSIDE-A 1 Root not available not available not available Slob, A., Jekel, B., De Jong, B., Schlatmann, E. 1975. On the Occurrence of Tuliposides in the Liliiflorae. Phytochemistry, 14: 1997-2005.
TULIPOSIDE-B 0 Root not available not available not available Slob, A., Jekel, B., De Jong, B., Schlatmann, E. 1975. On the Occurrence of Tuliposides in the Liliiflorae. Phytochemistry, 14: 1997-2005.
View the list of ubiquitous chemicals
List of plant activities.
Click on column headings to sort table by that column. *Unless otherwise noted all references are to (Duke, 1992)
Activity Chemical Count Reference
Detoxicant 2 Duke, 1992 *
Detoxicant (Alcohol) 1 Duke, 1992 *
Diagnostic 1 Martindale's 28th
Diaphoretic 1 Duke, 1992 *
Diaphoretic? 3 Lawrence Review of Natural Products, Dec-90.
Differentiator 1 Duke, 1992 *
Disinfectant 1 Martindale's 29th
Diuretic 13 Duke, 1992 *
DNA-Active 1 Jeffery B. Harborne and H. Baxter, eds. 1983. Phytochemical Dictionary. A Handbook of Bioactive Compounds from Plants. Taylor & Frost, London. 791 pp.
DNA-Protective 1 Duke, 1992 *
Dye 3 Merck 11th Edition
Elastase-Inhibitor 1 Duke, 1992 *
Emetic 2 Martindale's 29th
Encephalopathic 1 Martindale's 29th
Energizer 1 Duke, 1992 *
Epidermal-Stimulant 1 Duke, 1992 *
Ergogenic 1 Duke, 1992 *
Erythrocytogenic 1 Davies, S., and Stewart, A. 1990. Nutritional Medicine. Avon Books, New York. 509pp.
Essential 8 Jeffery B. Harborne and H. Baxter, eds. 1983. Phytochemical Dictionary. A Handbook of Bioactive Compounds from Plants. Taylor & Frost, London. 791 pp.
Estrogenic 5 Duke, 1992 *