When the essential oil expires, it will have the same characteristics of oil-water separation. If this character does not appear, it can still be used. Expired essential oils should be classified. If it is plant essential oil (more than two years): lavender, rosemary, mint, marjoram, vanilla, basil, cypress, pine needle, tea tree, eucalyptus and so on. , the nature becomes sticky first, the choking disappears, and the taste is light and sweet. This essential oil has no antibacterial effect. Of course, Guangxiang can, but it can't. It's a little stale, but it smells good. It can be dripped into a bucket to mop the floor or clean the house, just for use, and it can also have a natural fragrance.
In addition, if the fruit essential oil has expired (more than one year), it is really not suitable for use, because the odor removal effect is not good and there is no antibacterial power. If you feel pity, you can also put it in the shoe cabinet or drop it in water to clean the refrigerator, microwave oven and oven.
Resin and meta-resin, sandalwood, cedar, vetiver, frankincense, myrrh, benzoin, balsam of Peru, these essential oils have not expired, and they are all more fragrant with age. It can be used!
As long as 100% of flower essential oils such as rose, jasmine, osmanthus fragrans and chamomile have a purity guarantee period of about three years, don't worry!