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Costus Root Oil

Q: Is Costus Root Oil natural or synthetic?

. Extraction: Steam distillation of dried, chopped roots. Yield is approximately 1.5-3%. The roots are harvested after 2-3 years of growth. Principal production in India (Himachal Pradesh) and China (Yunnan). Saussurea costus is listed under CITES Appendix I (most restrictive category), requiring strict documentation for international trade. Some farms are now cultivating it under controlled conditions to meet CITES requirements..

ROOTS AND MOSSES / animalic · woody · earthy

Costus Root Oil

Category	ROOTS AND MOSSES
Subcategory	animalic · woody · earthy
Origin
Volatility	Base Note
Botanical	Aucklandia costus (syn. Saussurea costus, Saussurea lappa)
Appearance	brownish amber semi-solid
Odor Strength	Very High
Producing Countries	India (Himalayan region), China
Pyramid	Base

Animalic, fatty-warm with a complex, hair-like quality. Costus root oil smells like warm animal fur dampened by rain — musky, slightly dirty, with a violet-orris undertone.

Scent
The Full Story
Fun Fact
Extraction & Chemistry
In Perfumery

Scent

Intensely animalic at concentration — fatty, warm, hair-like, almost dirty. At dilution, a complex woody-violet quality emerges. Orris-like powdery qualities. Warmer and fattier than musk, less smoky than castoreum, more violet than civet. The transformation between concentrated and diluted is dramatic — costus is barely recognizable at 1% versus 100%.

Evolution over time

Immediately

Animalic, fatty, warm. Almost confrontational if concentrated.

After a few hours

Violet-orris facet emerges at dilution. Fur-like warmth. Complex and deep.

After a few days

Persistent animalic-woody base. Powdery undertone. Lasts extensively.

The Full Story

Essential oil distilled from the dried roots of Saussurea costus (syn. Saussurea lappa), a plant native to the Himalayas (Kashmir, Himachal Pradesh). The oil is pale yellow to brownish with an intensely animalic, fatty, complex aroma.

Costus is a polarizing material in perfumery. Its dominant character is animalic — warm, fatty, almost hair-like — with undertones of violet, orris, and dried herbs. Key aroma compounds include costunolide and dehydrocostus lactone (sesquiterpene lactones), along with various fatty-animalic molecules. At high concentration, costus can smell almost fecal; at proper dilution, it provides a warm, fur-like animalic depth that is prized in amber and chypre compositions.

Costus is CITES-listed due to overexploitation of wild populations. Sustainable cultivation programs exist in India and China, but the plant remains under trade restrictions.

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Related: Alder · Alpha Humulene · Amaranth · Amberever · Ambramone · Amburana Bark · Antillone · Apple Tree

Did You Know?

Did you know?

Costus root was a prized ingredients in ancient Indian and Chinese medicine — in Ayurveda it is called 'kushta' and in traditional Chinese medicine 'mu xiang.' It was so valuable along the ancient Silk Road that Roman customs records from the 1st century CE list costus alongside pepper and silk as taxable luxury imports from India.

Extraction & Chemistry

Extraction method: Steam distillation of dried, chopped roots. Yield is approximately 1.5-3%. The roots are harvested after 2-3 years of growth. Principal production in India (Himachal Pradesh) and China (Yunnan). Saussurea costus is listed under CITES Appendix I (most restrictive category), requiring strict documentation for international trade. Some farms are now cultivating it under controlled conditions to meet CITES requirements.

Molecular Formula	Complex mixture — key components: costunolide (C₁₅H₂₀O₂), dehydrocostus lactone (C₁₅H₁₈O₂)
CAS Number	8023-88-9
Botanical Name	Aucklandia costus (syn. Saussurea costus, Saussurea lappa)
IFRA Status	Restricted — severely limited by IFRA (49th Amendment) due to sensitizing sesquiterpene lactones (costunolide, dehydrocostus lactone). Also CITES Appendix I (endangered species).
Synonyms	Saussurea costus oil, Kuth oil
Physical Properties
Odor Strength	Very High
Appearance	brownish amber semi-solid
Flash Point	> 200.00 °F. TCC ( > 93.33 °C. )

In Perfumery

Base-note modifier in amber, chypre, and animalic compositions. Costus root oil provides warm, animalic depth that no synthetic has fully replicated. At trace levels (0.01-0.1%), it adds a fur-like warmth and a violet-powdery dimension to compositions. In chypre structures, it enhances the animalic quality alongside oakmoss and castoreum. The material is used with extreme restraint — overdosing creates an unwearable result. CITES restrictions and IFRA guidelines on costus lactone limit availability and usage.