Ociumum tenuiflorum aka Ocimum sanctum aka Tulsi Essential Oil, steam distilled in India from the leaves and flowers/buds.
Holy Basil is grown and distilled for aromatic, medicinal and spiritual purposes and is commonly used in India and within Ayurvedic practices.
Aroma: A strong top note with a spicy, warm, sweet scent like a mix of sweet basil and clove oils because holy basil contains up to 85% eugenol, the chemical constituent that gives clove oil its characteristic aroma.
Common Uses: muscular spasms and cramping, respiratory condition, menstrual discomfort, headache, and mental and physical fatigue [Source: Valerie Ann Worwood, The Complete Book of Essential Oils and Aromatherapy, 25th Anniversary Edition (Novato, CA: New World Library, 2016, 569.]
Suggested uses: As an energizing and stimulating inhaler, diffuser and room mist blends. Holy basil can be used to enhance focus while easing anxiety and stress.
Colour: Pale Yellow
Consistency: Thin
Major Chemical Constituents: Eugenol, 1,8-Cineole, Estragole, B-Bisabolene, (Z)-a-Bisabolene
[See Essential Oil Safety for a more complete list of typical constituents.]
Source: B.M. Lawrence, Essential Oils 1988-1991 (Wheaton: Allured Publishing, 1993), 200-201. Source cited in Robert Tisserand and Rodney Young, Essential Oil Safety (Second Edition. United Kingdom: Churchill Livingstone Elsevier, 2014), 204.
Cautions and Safety Information:
Use sparingly or avoid topical use because holy basil can cause dermal irritation or sensitivity. Tisserand and Young suggest a dermal maximum of 1% based on Holy Basil Oil with up to 50.4% Eugenol content. They indicate that Holy Basil Oil may inhibit blood clotting. [Robert Tisserand and Rodney Young, Essential Oil Safety (Second Edition. United Kingdom: Churchill Livingstone Elsevier, 2014), 204.]
Photo thanks to By Shashidhara halady - Own work, CC BY-SA 3.0, Link