Tulsi oil is the essential oil of holy basil (Ocimum sanctum), made by steam distillation. Its quality is judged by its GC-MS profile, mainly eugenol and methyl eugenol, not by aroma or colour. Published analyses show a very wide spread in these two compounds. So a purchase order that says only "pure tulsi essential oil" can bring you very different materials. This guide explains what to specify, how the oil is made, where it is used and what to ask a tulsi oil manufacturer in India before you buy in bulk.
Key Takeaways
• Tulsi oil, holy basil essential oil and Ocimum sanctum essential oil are the same product family. Ocimum tenuiflorum is the current botanical synonym.
• Composition is not fixed. Published studies report eugenol from 2.4% to 75.5% in the same species.
• Specify both eugenol and methyl eugenol as ranges with a test method.
• Ask for a batch-specific GC-MS report and CoA, not a generic sheet.
• Eugenol is a declarable allergen in EU cosmetics, so check destination rules early.
• Compare quotes only on the same grade, volume and documents.
What is tulsi oil and how is it different from basil oil?
Tulsi oil is a volatile oil recovered from the leaves of holy basil by steam distillation. Its aroma is warm and spicy-herbal, and its character depends on the eugenol and methyl eugenol balance.
Trade names overlap, so the botanical name matters most. The table below separates the common terms.
Term | What it means in trade |
Tulsi oil / holy basil essential oil | Ocimum sanctum (syn. O. tenuiflorum), the species used in Ayurveda |
Sweet basil oil | Ocimum basilicum, a different aroma; its chemistry varies by chemotype (linalool and methyl chavicol are common). See basil oil |
Tulsi extract | A water or alcohol extract, not an essential oil |
If your product claims Ayurvedic identity, confirm the Latin name on the CoA before approving a sample.
Tulsi oil chemical composition: why one batch is not like another
The tulsi oil chemical composition depends on chemotype, plant part, growing region and harvest season. Three published GC-MS studies show how far it can swing: a study of five Ocimum species from western India found 75.5% eugenol in one green-type sample, a study of O. gratissimum and O. sanctum found an O. sanctum oil that was 92.4% methyl eugenol with only 2.4% eugenol, and a study of O. tenuiflorum from Yogyakarta reported 13.59% eugenol.
Across these three studies, the main compounds look like this:
Compound | Aroma role | Range reported across studies |
Eugenol | Clove-like, warm; marker compound | 2.4% to 75.5% |
Methyl eugenol | Sweet, spicy; regulated in some markets | 17.7% to 92.4% where it is a major compound |
β-Caryophyllene | Woody, spicy | 1.3% to 21.3% |
β-Elemene | Fresh, herbal | 9.9% to 15.7% |
β-Elemene | Fresh, herbal | About 5% to 20% |
These are literature ranges from the studies above, not a Norex guarantee. The takeaway for buyers is simple: a high-eugenol grade and a methyl eugenol-rich grade can both be sold as tulsi oil. Your specification must say which one you need.
These are literature ranges, not a Norex guarantee. The takeaway for buyers is simple: a "high-eugenol" grade and a "methyl eugenol-rich" grade can both be sold as tulsi oil. Your specification must say which one you need.
Tulsi oil extraction process: how steam distillation works
Steam distilled tulsi oil is made in four steps:
1. Fresh or dried leaves are loaded into a still.
2. Live steam passes through the herb and carries the volatile oil with it.
3. The vapour is condensed, and the oil separates from the water layer (hydrosol).
4. The oil is dried, filtered and packed in airtight containers.
Four controls shape quality: raw material and harvest time, distillation time and pressure, removal of residual water, and storage away from heat and light. Distillation time matters: a Yogyakarta study tested runs of 3 to 6 hours and got its best yield (0.62%) from fresh leaves distilled for 5 hours. This is why tulsi oil purity and quality should be proven by analysis.
Tulsi oil purity and quality: what to put in the specification
Use one specification for every supplier. Fill the ranges from your own formulation needs.
Parameter | What to request |
Botanical source | Ocimum sanctum / O. tenuiflorum |
CAS / EINECS | 8015-73-4 / 295-208-3 (as listed for Norex holy basil oil) |
Method | Steam distilled |
Appearance and odour | Colour and odour matched to the approved sample |
Eugenol and methyl eugenol | Minimum and maximum by GC |
Specific gravity, refractive index | Range at 20 °C |
Adulterant declaration | No synthetic eugenol, no added carriers |
Packaging | Sealed, airtight drums or aluminium containers; sizes agreed at quotation |
Shelf life and storage | Stated on the CoA |
For the tulsi oil eugenol content specification, name the test method. For the tulsi oil GC MS report and quality specifications, ask for the full chromatogram so your QC team can check peak identification. Eugenol rich tulsi oil should show eugenol as the leading peak.
Tulsi essential oil applications by industry
Ayurvedic and herbal products. Tulsi oil for Ayurvedic products includes balms, oral-care preparations, respiratory rubs and wellness formulations. Auditors check botanical identity and the eugenol range first.
Cosmetic and personal care. Tulsi oil for cosmetic and personal care formulations is used in hair oils, scalp care, soaps and aromatic blends. Under EU Regulation 1223/2009, eugenol must be declared on the label above 0.001% in leave-on products and 0.01% in rinse-off products. Also check IFRA guidance and the methyl eugenol limits of your destination market.
Aromatherapy and wellness. The herbal-spicy profile suits diffuser, massage and purifying blends.
Flavour and functional use. Tulsi notes appear in herbal and wellness drinks. Check the regulatory status of the oil in each destination market first.
If you need other eugenol-led oils, compare clove oil and cinnamon leaf oil on the same specification sheet.
Common quality problems to avoid
Most disputes over tulsi oil come from a few repeat issues. Knowing them helps you write a tighter purchase order.
• Wrong species. Sweet basil or other Ocimum oil sold under the tulsi name. The GC-MS profile and the Latin name expose this quickly.
• Added eugenol or carriers. Synthetic eugenol or a cheap carrier oil can lift an assay figure while the rest of the profile looks wrong. A full chromatogram, not just a eugenol percentage, helps catch this.
• Batch drift. Two lots from the same supplier can differ because of harvest and season. Ask for the CoA of the exact lot you receive, and keep a retained sample.
• Old or poorly stored oil. Heat, light and air change the aroma over time. Check the manufacturing date and the packaging.
• Unclear grade. "High eugenol" means little without a range. Put the number in the contract.
A short incoming-QC routine closes most of these gaps. Run an identity check by GC on every lot, compare it with the approved sample and file the CoA with the batch record.
How to choose a bulk tulsi oil supplier
When you compare a bulk tulsi oil supplier or a holy basil essential oil manufacturer, use one checklist:
• Batch-specific CoA and GC-MS report
• Guaranteed eugenol and methyl eugenol ranges with test method
• MSDS, allergen statement and GMO statement; halal and kosher certificates if needed
• MOQ, lead time and packaging sizes
• Sample policy and batch traceability
• Certifications held by the manufacturing site
On cost, the tulsi oil wholesale price per kg in India changes with harvest, grade and volume. Quotes are therefore grade-specific. Send your required ranges and annual volume to get a quote you can compare. For tulsi essential oil bulk purchase for manufacturers, ask for a retained sample from each lot.
Conclusion
Tulsi oil is a variable natural material, so the specification does the work. Define the botanical source, set eugenol and methyl eugenol ranges, require a batch GC-MS report and confirm the documents your market needs. Do this and quotes from any tulsi oil manufacturer in India become comparable.
Next step: Request a sample or quote with your eugenol range, volume and destination market. The Norex team will reply with the specification, documents and lead time.
Sourcing tulsi essential oil from Norex
Norex Flavours has supplied essential oils, aroma chemicals and flavours from Mandi Dhanaura, Uttar Pradesh, since 1994. Its production lines are WHO-GMP certified, and Norex lists ISO 9001, ISO 22000 and FSSC 22000 certification. The laboratory includes a GC section, microbiology, physical chemistry and stability studies. Norex lists its holy basil oil as steam-distilled from Ocimum sanctum leaves, of Indian origin (CAS 8015-73-4, EINECS 295-208-3), with bulk quantities available for commercial manufacturing and full export documentation. For buyers who want a bulk holy basil oil supplier in India, send your required eugenol range and the documents your market needs, and the team will confirm what applies to your lot.
Review the Holy Basil Oil (Tulsi) specification, browse the essential oils collection or read about Norex capabilities. Buyers searching for a tulsi essential oil supplier in India can also contact the team directly.