GET TO KNOW YOUR OILS
Dark Turmeric
Curcuma caesia Roxb.
Chemotype: camphor / ar-turmerone type
- PLANT PART
- rhizomes
- EXTRACTION
- steam distillation
- AROMA NOTE
- mid-base
LEARN AS YOU COMPARE
What’s inside this oil?
Constituents are the natural chemicals that give an oil its character. See the main ones, learn what they do, and explore differences between batches.
Meet the main constituents, then select one to see what makes it interesting.
FOLLOW YOUR SENSES
Aroma & character
A closer look at this oil's scent, strength, and staying power.
- Aroma intensity
- 80 / 100
- Note layer
- mid-base
If you like this scent, explore
A LITTLE CARE GOES A LONG WAY
Using it thoughtfully
Read the full safety context before bringing this oil into your routine.
- Cited dermal maximum · leave-on
- No restriction cited
- Phototoxicity
- Not flagged in this profile
- Oxidation risk
- Unknown
A cited maximum is a limit, not a suggested dilution. Missing restrictions do not establish safety.
No phototoxic furocoumarin restriction was identified in the public sources reviewed for Curcuma caesia rhizome oil.
Contraindications & cautions
- majorThis oil's camphor content (~28% typical) places it in the camphor/ketone-rich neurotoxic category: camphor is a documented convulsant that can trigger seizures via oral, dermal, and inhalation exposure, so use should be avoided by individuals with epilepsy or a seizure disorder.
- majorCamphor-rich oils such as this one should be avoided on or around infants and young children; pediatric camphor exposure (oral, dermal, or inhaled) as small as a few mL of 20% camphor oil has caused seizures and can be lethal at higher doses.
- moderateGiven the high camphor fraction, dermal use should be kept well diluted; regulatory guidance caps camphor content at 11% in dermal products as a general safety ceiling for camphor-bearing preparations.
- moderateNo species-specific (Curcuma caesia) reproductive-toxicity data was located; as a precaution given the oil's high camphor content and camphor's known systemic toxicity at excessive doses, avoid use during pregnancy and nursing without professional guidance.
Explore measured chemistry from supplier batches
A supplier report describes a particular sample. Open this workspace to investigate measured constituents and their original documents.
THE SCIENCE BEHIND THE SCENT
Inside the oil
An oil's character comes from its natural chemical composition. Explore each constituent to understand the connections.
About this composition
Dark turmeric here is treated as black turmeric (Curcuma caesia), the rhizome oil-bearing species publicly described as camphoraceous in both older composition work and newer aroma-focused literature. The quantitative backbone comes from the cited central-India GC-MS paper, which reports a camphor-led profile with ar-turmerone, (Z)-beta-ocimene, ar-curcumene, and 1,8-cineole as additional major markers. Live web review on 2026-07-07 also confirmed newer open-access literature documenting substantial chemotype variability within Curcuma caesia, including a recent PMC article reporting rhizome oils where curzerenone and eucalyptol become more prominent, so the retained constituent percentages are best read as one verified central-India profile rather than a universal species average. The same pass also confirmed public aroma-focused literature describing black turmeric oil as camphoraceous, sweet, spicy, fresh, and herbal with mushroom-like, rooty, and fatty bynotes. Two public unrestricted-regulatory signals were also located for generic turmeric root oil centered on Curcuma longa: an NHR Organic Oils IFRA 51 conformity certificate stating the oil is "Not limited" across categories 1-12 and contains no substances restricted by the current IFRA Standards, and a ScenTree regulatory page stating turmeric roots oil is not restricted under IFRA 51 while listing the ingredient under Curcuma longa rather than Curcuma caesia. Those documents were retained only as comparator context because they do not verify a species-specific `max_dermal_pct` for black turmeric.
| Constituent | Typical amount | Reported range | Chemical family | Source |
|---|---|---|---|---|
| Camphor | 28.3% | 28.3–28.3% | monoterpene ketone | View sourceVolatile constituents of the rhizome oil of Curcuma caesia Roxb. from central India https://www.academia.edu/15290454/Volatile_constituents_of_the_rhizome_oil_of_Curcuma_caesia_Roxb_from_central_India (abstract and Table 1: camphor 28.3%) |
| ar-Turmerone | 12.3% | 12.3–12.3% | sesquiterpene ketone | View sourceVolatile constituents of the rhizome oil of Curcuma caesia Roxb. from central India https://www.academia.edu/15290454/Volatile_constituents_of_the_rhizome_oil_of_Curcuma_caesia_Roxb_from_central_India (abstract and Table 1: ar-turmerone 12.3%) |
| (Z)-beta-Ocimene | 8.2% | 8.2–8.2% | monoterpene hydrocarbon | View sourceVolatile constituents of the rhizome oil of Curcuma caesia Roxb. from central India https://www.academia.edu/15290454/Volatile_constituents_of_the_rhizome_oil_of_Curcuma_caesia_Roxb_from_central_India (abstract and Table 1: (Z)-beta-ocimene 8.2%) |
| ar-Curcumene | 6.8% | 6.8–6.8% | sesquiterpene hydrocarbon | View sourceVolatile constituents of the rhizome oil of Curcuma caesia Roxb. from central India https://www.academia.edu/15290454/Volatile_constituents_of_the_rhizome_oil_of_Curcuma_caesia_Roxb_from_central_India (abstract and Table 1: ar-curcumene 6.8%) |
| 1,8-Cineole (eucalyptol) | 5.3% | 5.3–5.3% | oxide | View sourceVolatile constituents of the rhizome oil of Curcuma caesia Roxb. from central India https://www.academia.edu/15290454/Volatile_constituents_of_the_rhizome_oil_of_Curcuma_caesia_Roxb_from_central_India (abstract and Table 1: 1,8-cineole 5.3%) |
| beta-Elemene | 4.8% | 4.8–4.8% | sesquiterpene hydrocarbon | View sourceVolatile constituents of the rhizome oil of Curcuma caesia Roxb. from central India https://www.academia.edu/15290454/Volatile_constituents_of_the_rhizome_oil_of_Curcuma_caesia_Roxb_from_central_India (abstract and Table 1: beta-elemene 4.8%) |
| Borneol | 4.4% | 4.4–4.4% | monoterpene alcohol | View sourceVolatile constituents of the rhizome oil of Curcuma caesia Roxb. from central India https://www.academia.edu/15290454/Volatile_constituents_of_the_rhizome_oil_of_Curcuma_caesia_Roxb_from_central_India (abstract and Table 1: borneol 4.4%) |
| Bornyl acetate | 3.3% | 3.3–3.3% | monoterpene ester | View sourceVolatile constituents of the rhizome oil of Curcuma caesia Roxb. from central India https://www.academia.edu/15290454/Volatile_constituents_of_the_rhizome_oil_of_Curcuma_caesia_Roxb_from_central_India (abstract and Table 1: bornyl acetate 3.3%) |
Profile source: Volatile constituents of the rhizome oil of Curcuma caesia Roxb. from central India; Study on aroma-profile, key odorants and ontogenetic variability of black turmeric (Curcuma caesia Roxb.) essential oil; Chemometric-guided diversity study of black turmeric essential oils from Eastern India; Analysing Curcuma caesia fractions and essential oil for phytochemical composition and antimicrobial potential; ScenTree Turmeric roots oil page; Organic Turmeric Essential Oil IFRA 51 Conformity Certificate · https://onlinelibrary.wiley.com/doi/abs/10.1002/ffj.1255 ; https://www.sciencedirect.com/science/article/abs/pii/S0926669022015989 ; https://pmc.ncbi.nlm.nih.gov/articles/PMC12627858/ ; https://pmc.ncbi.nlm.nih.gov/articles/PMC8076375/ ; https://pmc.ncbi.nlm.nih.gov/articles/PMC11954962/ ; https://www.scentree.co/en/Turmeric_roots_oil.html ; https://www.nhrorganicoils.com/uploads/20260105123456e_Turmeric_IFRA_51.pdf
A TRADITION OF BOTANICAL CURIOSITY
Traditional & reported uses
These uses reflect the profile's reported traditions and literature. They are not established treatment recommendations.
- shares the traditional grounding, earthy reputation of turmeric-family rhizome oils
- used in perfumery for a warm, woody-spicy, slightly camphoraceous base note
- traditionally associated with Ayurvedic-inspired aromatherapy for a warming effect
- reported to be used in blends for a rooty, earthy depth
- used in small proportions as a spice-note fixative in oriental compositions
For aromatherapy and wellness use only — not medical advice. Effect statements are traditional/reported associations, not treatment claims. The Synergy Rating scores blend craft, harmony and safety, not medical efficacy. Read the safety framework.
What we're still learning · 4 data gaps
Good decisions start with knowing what is — and isn't — in the evidence.
- The stored max_dermal_pct 100 is an archive-style unrestricted placeholder derived from ScenTree's IFRA 51 status for turmeric roots oil, where the page is centered on Curcuma longa but explicitly notes that encountered species can include Curcuma caesia Roxb. The blocking source type for verified completion remains a public IFRA certificate, supplier safety sheet, or technical dossier naming Curcuma caesia specifically, or a directly readable safety monograph that states a numeric maximum dermal percentage for this species.
- Live research on 2026-07-07 also looked for the cited NHR Organic Oils IFRA 51 conformity certificate for turmeric, but the previously referenced direct PDF URL returned HTTP 404 during this pass. The same research located a recent open-access Curcuma caesia rhizome-oil paper at PMC documenting a markedly different curzerenone/eucalyptol-led profile, reinforcing that species-level chemotype variability is real but still not a substitute for a species-specific dermal cap.
- Odor intensity 80 remains an archive normalization of the public aroma descriptions for black turmeric oil as camphoraceous, sweet, spicy, fresh, and herbal rather than a directly published 0-100 measurement.
- No public source reviewed in this pass provided verified volatility-rate or tenacity-hour values. The blocking source type is a supplier technical sheet or perfumery monograph that quantifies evaporation rate or wear time for Curcuma caesia oil.