pediaTamanu oil, from the Calophyllum inophyllum L. (Calophyllaceae family) tree seeds, obtained by cold-press method, is a dark green botanical oil with a distinctive intense aroma. Known in South Pacific islands as “green gold”, tamanu oil has been valued in Polynesian and Southeast Asian traditions for skin care for centuries. It is unique for coumaric derivative compounds such as calophyllolide not found in other botanical oils, and has a special place in research literature. This monograph addresses tamanu oil as a cosmetic ingredient; it carries no therapeutic or healing claims.
This article is not a product promotion. This is a cosmetic ingredient monograph; not product or treatment advice.
Botanical source and traditional use
Calophyllum inophyllum L., belonging to the Calophyllaceae family, is a large (20-30m), evergreen coastal tree native to Southeast Asia, India, East Africa and Pacific islands. It is distinguished by its shiny dark green leaves, white flowers and small green-yellow drupe fruits. The tree is salt and wind tolerant and grows naturally in the coastal zone.
Tamanu oil is an important component of traditional culture, particularly in Polynesia (Tahiti, Fiji, Vanuatu), Melanesia and Southeast Asia (Vietnam, Thailand, Myanmar). Known as “dilo oil” in Fiji, “ati” or “tamanu” in Tahiti, and “dầu mù u” in Vietnam. The medical aspects of these traditional uses belong to the human product context; below the substance is addressed as a cosmetic ingredient.
Production: the aging process
Tamanu oil production is unique. Freshly harvested fruits are not pressed directly — because fresh seeds contain very little oil. Fruits are dried in the sun for 1-2 months; during this time the seeds turn dark brown and oil content increases dramatically (can reach approximately 75% of dry weight). This aging process plays a critical role in the formation of tamanu oil’s distinctive compounds (calophyllolide, calophyl lactone). The dried seeds are then cold-pressed to obtain a dark green, viscous, intensely aromatic oil.
Chemical profile
Fatty acid composition
Tamanu oil contains: oleic acid (34-41%), linoleic acid (21-38%), palmitic acid (12-18%) and stearic acid (8-18%). This balance between oleic and linoleic acid gives the oil an emollient (skin-softening) and film-forming cosmetic quality.
Unique components: coumaric derivatives
The most distinctive feature of tamanu oil is that it contains unique compounds not found in other botanical oils:
- Calophyllolide (calophyllolide): A pyranocumarin derivative; a compound studied in phytochemistry literature.
- Calophyl lactone (inophyllum): A coumaric lactone derivative; examined in vitro in phytochemistry literature.
- Calophyl acid: A terpenoid studied in phytochemistry literature.
These unique compounds move tamanu oil beyond “just an emollient” and give it a special position in research literature.
Resinous fraction
In addition to fatty acids and coumaric derivatives, tamanu oil also contains a resinous fraction. This fraction is the source of the oil’s dark green color, intense aroma and viscous structure; it also contributes to the oil’s antioxidant capacity.
Place in scientific literature
Tamanu oil is extensively reviewed in cosmetic and phytochemistry literature; Dweck and Meadows’ review in International Journal of Cosmetic Science (2002) is among the foundational references of this literature. The traditional/medical uses mentioned in these studies belong to the human products context and are outside the scope of this cosmetic ingredient monograph. The purpose here is to convey the chemical behavior of tamanu oil and its role in cosmetic (emollient, color) use.
Place in the cosmetic industry
Tamanu oil occupies a place in the cosmetic industry in the “specialty oil” category. Due to its high price (100% pure tamanu oil can be 5-10 times more expensive than common botanical oils) and strong aroma, it is generally used in recipes in low proportions or as a supergrowth. The CIR (Cosmetic Ingredient Review) has evaluated the safe use of Calophyllum Inophyllum Seed Oil in cosmetic products. In recent years, with “natural cosmetics” and “ethnobotany” trends, interest in tamanu oil is increasing.
Safety profile
Tamanu oil is generally considered safe for topical cosmetic use. Its long history of traditional use supports its safety profile. Rare allergic reactions are possible. The dark color and strong aroma may be disadvantageous for some users; caution should be used around the eyes.
Tamanu oil in soap making
Method and ratio of use
Tamanu oil is generally used as a supergrowth in soap making (at a ratio of 3-8%, addition after trace) — in this method its unique compounds do not participate in the saponification reaction and are largely preserved. It can also be used at a ratio of 5-15% in the main recipe. SAP value (NaOH) is approximately 0.137.
Properties it adds to soap
Tamanu oil provides a greenish color tone to the soap (from the resinous fraction), its own botanical-resinous-spicy aroma (strong — blending with other essential oils is recommended) and moisturizing feel (oleic+linoleic acid balance).
Tamanu oil and the modern “natural cosmetics” trend
In recent years, with “clean beauty” and ethnobotany trends, there has been growing interest in traditional Polynesian and Southeast Asian botanical preparations. Tamanu oil is one of the striking components of this trend and is increasingly appearing in international cosmetic brands’ “exotic oils” collections.
Frequently Asked Questions
What is tamanu oil?
Tamanu oil is a botanical oil obtained from the seeds of the Calophyllum inophyllum tree, containing unique compounds unique to the South Pacific.
What is tamanu oil used for in soap?
By adding as a supergrowth (3-8%) after saponification, its components are preserved. It adds a greenish color and botanical-resinous aroma to the soap.
Why is tamanu oil green and intensely aromatic?
The dark green color and intense aroma come from the oil’s resinous fraction. This fraction is also the carrier of unique coumaric derivative compounds (calophyllolide, calophyl lactone).
Chailea products containing this ingredient
- Natural Activated Charcoal Soap 100 g
References
- Dweck AC, Meadows T. Tamanu (Calophyllum inophyllum) — the African, Asian, Polynesian and Pacific Panacea. International Journal of Cosmetic Science, 2002; 24(6):341-348. PMID: 18494888. PubMed. (A cosmetic science review; traditional/medical uses are outside the scope of this monograph.)
- CIR — Safety Assessment of Calophyllum Inophyllum Seed Oil as used in cosmetics. Cosmetic Ingredient Review.