Table 2.
Chemical composition of Origanum majorana essential oil.
| Compound | % | KI a | KI b | Identification c |
|---|---|---|---|---|
| α-Pinene | 4.1 | 941 | 932 | 1,2,3 |
| p-Cymene | 2.6 | 950 | 1024 | 1,2,3 |
| iso-Sylvestrene | 0.6 | 952 | 1008 | 1,2,3 |
| β-Pinene | 0.2 | 975 | 974 | 1,2,3 |
| α-Phellandrene | 2.6 | 984 | 1002 | 1,2,3 |
| δ-3-Carene | 1.9 | 1008 | 1011 | 1,2 |
| α-Terpinene | 19.2 | 1021 | 1017 | 1,2,3 |
| Limonene | 0.1 | 1038 | 1029 | 1,2,3 |
| 1,8 Cineole | 3.0 | 1047 | 1031 | 1,2,3 |
| β-Ocimene | 0.1 | 1061 | 1037 | 1,2,3 |
| cis-Sabinene hydrate | 1.3 | 1070 | 1070 | 1,2 |
| Terpinen-4-ol | 34.1 | 1096 | 1149 | 1,2,3 |
| endo-Fenchyl-acetate | 9.8 | 1114 | 1220 | 1,2 |
| Pulegone | 0.7 | 1122 | 1237 | 1,2 |
| trans-Pinocarveol | 0.3 | 1143 | 1139 | 1,2 |
| Terpineol | 8.9 | 1160 | 1133 | 1,2,3 |
| cis-Limonene oxide | T | 1188 | 1136 | 1,2 |
| dihydro-Linalool | 0.1 | 1191 | 1135 | 1,2 |
| cis-Verbenol | T | 1193 | 1141 | 1,2,3 |
| Viridene | 0.1 | 1199 | 1167 | 1,2 |
| (E)-Isocitral | 0.2 | 1205 | 1180 | 1,2 |
| Thymol | 0.2 | 1211 | 1290 | 1,2,3 |
| Carvacrol | 0.3 | 1220 | 1299 | 1,2,3 |
| γ-Elemene | 0.1 | 1233 | 1338 | 1,2,3 |
| α-Terpinyl acetate | 0.8 | 1242 | 1349 | 1,2 |
| Eugenol | T | 1271 | 1359 | 1,2,3 |
| Neryl acetate | 0.2 | 1274 | 1361 | 1,2 |
| α-Copaene | T | 1278 | 1376 | 1,2,3 |
| Geranyl acetate | 0.3 | 1293 | 1381 | 1,2,3 |
| iso-Longifolene | 0.1 | 1303 | 1390 | 1,2 |
| (E)-Caryophillene | 2.1 | 1314 | 1407 | 1,2,3 |
| β-Duprezianene | T | 1321 | 1422 | 1,2 |
| β-Cedrene | T | 1324 | 1420 | 1,2,3 |
| β-Copaene | T | 1327 | 1432 | 1,2,3 |
| α-Guaiene | 0.2 | 1332 | 1439 | 1,2,3 |
| Aromadendrene | 0.3 | 1336 | 1441 | 1,2,3 |
| allo-Aromadendrene | 1.3 | 1370 | 1460 | 1,2 |
| Valencene | 0.2 | 1401 | 1496 | 1,2,3 |
| Caryophyllene oxide | T | 1436 | 1583 | 1,2,3 |
| Epiglobulol | T | 1445 | 1590 | 1,2 |
| (-)-Spathulenol | T | 1453 | 1578 | 1,2 |
| β-Atlanthol | 1.6 | 1464 | 1608 | 1,2,3 |
| Rosifoliol | 0.1 | 1485 | 1600 | 1,2 |
| Cubenol | T | 1497 | 1646 | 1,2 |
| Total | 97.8 | |||
| Monoterpene hydrocarbons | 33.1 | |||
| Oxygenated monoterpene | 57.9 | |||
| Sesquiterpene hydrocarbons | 5.1 | |||
| Oxygenated sesquiterpenes | 1.7 |
a Kovats retention index on HP-5 MS column; b Kovats retention index on HP Innovax column; c Identification: 1 = Kovats retention index, 2 = mass spectrum, 3 = co-injection with pure compound. T = traces, less than 0.05%.