PURE TUNG OIL

Pure Tung Oil is a drying vegetable oil obtained from the seeds of the tung tree and used mainly in coatings, wood finishing, and industrial formulation applications, and Pure Tung Oil is valued for forming tough, water-resistant films through oxidative polymerization.
Pure Tung Oil is used as a natural wood finish, a binder or modifier in paints and varnishes, and a component in specialty resins, and Pure Tung Oil performance depends on fatty acid profile, purity, degree of refinement, drying conditions, and use of driers or catalysts in the formulation.
Pure Tung Oil is typically supplied as a pale yellow to amber viscous liquid, and Pure Tung Oil can oxidize and skin over when exposed to air, so storage should minimize oxygen exposure and contamination.

CAS Number: 8001-20-5 (tung oil; commonly associated)
EC Number: 232-272-3 (commonly associated)
Molecular Formula: Mixture (triglycerides rich in α-eleostearic acid; variable)
Molecular Weight: Mixture (variable)

Synonyms: Pure Tung Oil, Tung Oil, China Wood Oil, Wood Oil, Aleurites Fordii Oil, Drying Oil Tung, Natural Tung Oil, 100% Tung Oil, Raw Tung Oil (if unmodified), Polymerizing Tung Oil, Tung Oil Wood Finish, Tung Oil Varnish Oil, Pure Tung Oil, Tung Oil, China Wood Oil, Chinese Wood Oil, Wood Oil, Drying Tung Oil, Pure China Wood Oil, Pure Chinese Wood Oil, Aleurites Oil, Aleurites Fordii Oil, Vernicia Fordii Oil, Vernicia Montana Oil, Tung Tree Oil, Tung Nut Oil, Tung Seed Oil, China Nut Oil, Chinese Nut Oil, Natural Tung Oil, Raw Tung Oil, Unrefined Tung Oil, Refined Tung Oil, Polymerizing Tung Oil, Drying Oil Tung Oil, Furniture Tung Oil, Wood Finishing Tung Oil, Wood Treatment Tung Oil, Wood Protection Tung Oil, Waterproofing Tung Oil, Water-Resistant Tung Oil, Pure Wood Finish Oil, Natural Wood Finish Oil, Tung Oil Wood Finish, Tung Oil Finish, Pure Tung Oil Finish, Tung Oil Coating, Tung Oil Sealer, Tung Oil Varnish Base, Tung Oil Paint Base, Tung Oil Resin Base, Tung Oil Binder, Tung Oil Natural Drying Oil, Tung Oil for Wood, Tung Oil for Furniture, Tung Oil for Floors, Tung Oil for Boats, Tung Oil for Exterior Wood, Tung Oil for Interior Wood, Tung Oil CAS 8001-20-5, China Wood Oil CAS 8001-20-5, Pure Tung Oil CAS 8001-20-5

APPLICATIONS

Pure Tung Oil is used as a wood finish to penetrate wood, enhance grain appearance, and form a protective, water-resistant film.
Pure Tung Oil is applied to furniture, countertops, and flooring in selected finishing systems to improve durability and moisture resistance.
Pure Tung Oil is used in exterior wood protection in compatible systems where film formation and weathering resistance are required.

Pure Tung Oil is used in varnishes and oil-based paints as a drying oil binder that contributes to film hardness and chemical resistance.
Pure Tung Oil is incorporated into alkyd and modified oil formulations to improve water resistance and reduce yellowing compared with some other drying oils.
Pure Tung Oil is used in marine and outdoor coatings in selected applications where moisture resistance is important.

Pure Tung Oil is used in specialty resin and polymer synthesis as a renewable oil feedstock that can be chemically modified to create drying-oil resins.
Pure Tung Oil is incorporated into oil-modified polyurethane or alkyd systems in selected applications to tune flexibility and hardness.
Pure Tung Oil is used in printing ink vehicles in selected formulations where drying oil behavior supports film formation.

Pure Tung Oil is used in sealants and caulks in selected applications to provide hydrophobicity and improved film characteristics.
Pure Tung Oil is incorporated into wax and oil blends to adjust hardness and water resistance of protective coatings.
Pure Tung Oil is used in leather finishing in selected applications to improve water repellency and surface feel.

Pure Tung Oil is used in conservation and restoration work in selected applications where traditional drying oils are needed for compatible finishes.
Pure Tung Oil is incorporated into craft and artisan finishing systems where natural, plant-based materials are preferred.
Pure Tung Oil is valued because Pure Tung Oil forms a crosslinked film with strong water resistance and good durability when properly cured.

Pure Tung Oil is used as a drying oil finish for wood to enhance grain and provide water resistance.
Pure Tung Oil supports deep penetration into wood pores for a natural-looking finish.
Pure Tung Oil helps create a flexible, water-resistant film as it cures.

Pure Tung Oil is used in furniture finishing to provide a durable, hand-rubbed appearance.
Pure Tung Oil supports warm tone development and enhanced chatoyance in wood.
Pure Tung Oil helps improve resistance to water rings compared with some non-drying oils.

Pure Tung Oil is used on butcher blocks and food-contact wood items in some applications when fully cured.
Pure Tung Oil supports a protective barrier that reduces moisture absorption.
Pure Tung Oil helps improve stain resistance in wood surfaces used in kitchens.

Pure Tung Oil is used in cutting boards as a penetrating finish in some use cases.
Pure Tung Oil supports easier maintenance by allowing re-oiling without stripping.
Pure Tung Oil helps reduce swelling and warping by slowing water uptake.

Pure Tung Oil is used on wooden utensils and kitchenware in some applications when fully cured.
Pure Tung Oil supports a low-gloss natural finish suitable for frequent handling.
Pure Tung Oil helps reduce cracking caused by drying cycles in wood.

Pure Tung Oil is used for hardwood floors in some traditional finishing systems.
Pure Tung Oil supports a warm, matte-to-satin appearance in wood flooring.
Pure Tung Oil helps improve abrasion resistance when built up in multiple coats.

Pure Tung Oil is used in interior wood trim and paneling to provide a natural finish.
Pure Tung Oil supports reduced moisture absorption in indoor wood surfaces.
Pure Tung Oil helps improve longevity of wood appearance with periodic maintenance.

Pure Tung Oil is used on exterior wood in some applications when protected and maintained.
Pure Tung Oil supports water shedding and reduced checking in some outdoor wood surfaces.
Pure Tung Oil helps improve weathering performance when combined with UV-protective topcoats in some systems.

Pure Tung Oil is used in marine wood finishing in some traditional systems for boats and decks.
Pure Tung Oil supports water resistance in wood exposed to splashes and humidity.
Pure Tung Oil helps improve flexibility of the finish under moisture and temperature cycling.

Pure Tung Oil is used in woodworking projects as a standalone oil finish for a natural feel.
Pure Tung Oil supports tactile, non-plastic surface feel compared with some varnishes.
Pure Tung Oil helps enhance wood figure while maintaining a low-build finish option.

Pure Tung Oil is used in oil-varnish blends to improve drying and flexibility in some formulations.
Pure Tung Oil supports improved film formation when blended with resins.
Pure Tung Oil helps increase toughness and water resistance in some finish blends.

Pure Tung Oil is used in traditional varnish making as a drying oil component.
Pure Tung Oil supports oxidative curing that forms a crosslinked film.
Pure Tung Oil helps improve flexibility and adhesion of varnish films in some recipes.

Pure Tung Oil is used in alkyd resin production as a fatty oil component in some formulations.
Pure Tung Oil supports production of coatings with good flexibility and durability.
Pure Tung Oil helps improve water resistance and film strength in some alkyd systems.

Pure Tung Oil is used in paints as a binder component in some traditional and specialty coatings.
Pure Tung Oil supports formation of durable films after oxidative drying.
Pure Tung Oil helps improve leveling and flow in some oil-based paints.

Pure Tung Oil is used in artist materials as a component in some oil paint and medium formulations.
Pure Tung Oil supports glossy, durable films in certain artist media.
Pure Tung Oil helps improve water resistance and hardness compared with some alternative oils.

Pure Tung Oil is used in printing inks as a drying oil component in some formulations.
Pure Tung Oil supports oxidative curing of ink films in some systems.
Pure Tung Oil helps improve rub resistance and durability in some printed coatings.

Pure Tung Oil is used in leather care as a conditioning and protective oil in some traditional practices.
Pure Tung Oil supports water resistance in some leather treatments when applied appropriately.
Pure Tung Oil helps improve surface appearance in some leather goods.

Pure Tung Oil is used in bamboo and rattan finishing to improve water resistance and appearance.
Pure Tung Oil supports penetration into dense plant-based materials.
Pure Tung Oil helps reduce moisture-driven swelling in some finished items.

Pure Tung Oil is used in cork finishing to provide a protective, water-resistant surface in some applications.
Pure Tung Oil supports improved durability of cork surfaces under light wear.
Pure Tung Oil helps improve appearance and reduce staining in cork products.

Pure Tung Oil is used in stone and porous surface sealing in some applications where an oil-based sealer is acceptable.
Pure Tung Oil supports darkening and enhancement of natural stone appearance in some cases.
Pure Tung Oil helps reduce water penetration into porous substrates.

Pure Tung Oil is used in concrete and cementitious surface sealing in some niche applications.
Pure Tung Oil supports reduced dusting and improved water shedding in some finishes.
Pure Tung Oil helps improve surface appearance in some decorative concrete systems.

Pure Tung Oil is used in wood restoration to revive dry or weathered wood surfaces.
Pure Tung Oil supports replenishment of oils in aged wood fibers.
Pure Tung Oil helps improve color depth and reduce dry-looking surfaces.

Pure Tung Oil is used in antique furniture restoration to preserve a traditional finish approach.
Pure Tung Oil supports compatibility with historical finishing methods.
Pure Tung Oil helps maintain authentic appearance in restoration work.

Pure Tung Oil is used as a base for DIY wax blends when combined with beeswax in some recipes.
Pure Tung Oil supports spreadability of wax-oil pastes.
Pure Tung Oil helps improve water resistance of homemade wood wax finishes.

Pure Tung Oil is used in craft coatings where a natural, plant-derived finish is desired.
Pure Tung Oil supports “natural finish” positioning in artisan products.
Pure Tung Oil helps deliver a durable finish without synthetic resins in some projects.

Pure Tung Oil is used in woodworking education to demonstrate drying oil curing and film formation.
Pure Tung Oil supports teaching about oxidative polymerization and curing time.
Pure Tung Oil helps illustrate differences between drying and non-drying oils.

Pure Tung Oil is used in product development to evaluate natural oil finishes for wood protection.
Pure Tung Oil supports screening of penetration, cure rate, and water resistance.
Pure Tung Oil helps guide selection of finish systems for different wood species.

Pure Tung Oil is used in manufacturing troubleshooting for oil-finish defects such as tackiness and slow cure.
Pure Tung Oil supports diagnosis of application thickness and oxygen exposure problems.
Pure Tung Oil helps improve process guidance for correct curing and recoating windows.

DESCRIPTION

Pure Tung Oil is composed mainly of triglycerides rich in α-eleostearic acid, and this conjugated fatty acid structure makes Pure Tung Oil polymerize readily when exposed to oxygen.
Pure Tung Oil dries by oxidative curing rather than evaporation, and cure speed depends on temperature, airflow, film thickness, and presence of metal driers.
Pure Tung Oil forms a relatively hard, water-resistant film compared with some other drying oils, and this is why Pure Tung Oil is used for durable wood finishes.

Pure Tung Oil can skin over in the container if exposed to air, and this skin formation can be reduced by minimizing headspace and tightly sealing containers.
Pure Tung Oil can yellow or darken slightly over time depending on exposure conditions and formulation, and UV exposure and heat can accelerate color changes.
Pure Tung Oil should be used according to applicable regulations and good industrial hygiene practices for the target market and facility.

Pure Tung Oil is typically not recommended for individuals with nut allergies without appropriate assessment because it is derived from seeds, and handling should avoid ingestion or prolonged skin exposure.
Pure Tung Oil rags and porous materials can undergo exothermic oxidation, and oil-soaked rags can self-heat and pose fire risk if not handled properly.
Pure Tung Oil should be stored in cool conditions away from heat and ignition sources, and containers should be kept tightly closed to reduce oxidation.

Pure Tung Oil is a natural drying oil obtained from the seeds of the tung tree.
Pure Tung Oil is typically a pale to amber liquid that cures by oxidative polymerization to form a protective film.
Pure Tung Oil is valued for creating a water-resistant, flexible finish that highlights wood grain.

Pure Tung Oil penetrates wood and then crosslinks as it cures, so thin coats and adequate curing time are important.
Pure Tung Oil can cure more slowly than some commercial varnishes, especially in cool or humid conditions.
Pure Tung Oil may be blended with solvents or resins in some products, but “pure” grades are typically sold without added solvents.

Pure Tung Oil should be stored in tightly closed containers away from heat and oxygen exposure to reduce premature skinning.
Pure Tung Oil rags can present a spontaneous combustion risk due to oxidative drying and should be handled and disposed safely.
Pure Tung Oil is widely used for wood finishing and is also used as a component in some coatings, resins, and traditional varnish systems.

PROPERTIES

Common Name: Pure Tung Oil
Chemical Type: Drying oil; natural triglyceride mixture
Appearance: Pale yellow to amber viscous liquid
Odor: Mild characteristic oily odor
Solubility: Insoluble in water; soluble in many organic solvents; miscible with oils
Drying Mechanism: Oxidative polymerization; forms crosslinked film
Viscosity: Moderate to high; temperature dependent
Density: ~0.93–0.95 g/cm³ (typical; grade dependent)
Flash Point: Typically >200°C (typical; grade dependent)
Stability: Oxidizes on exposure to air; can form skin in container
Storage Temperature: 10–25°C, tightly closed, protect from air and light
Shelf Life: Typically 12–36 months in original sealed packaging (supplier dependent)

FIRST AID

Inhalation:
Move to fresh air if mists are inhaled during spraying.
Seek medical attention if respiratory irritation persists.
Avoid breathing aerosols generated by spraying or sanding cured films.

Skin Contact:
Wash with soap and water after contact.
Remove contaminated clothing and wash before reuse.
Seek medical advice if irritation develops or persists.

Eye Contact:
Rinse cautiously with water for several minutes.
Remove contact lenses if present and easy to do, then continue rinsing.
Seek medical attention if irritation persists.

Ingestion:
Rinse mouth with water.
Seek medical attention if discomfort occurs or if a large amount is swallowed.
Never give anything by mouth to an unconscious person.

Note to Physicians:
Treat symptomatically.
No specific antidote is required.
Provide supportive care as needed.

HANDLING AND STORAGE

Handling:
Use appropriate PPE including gloves and safety glasses for bulk handling.
Avoid splashing into eyes and avoid prolonged skin contact.
Use appropriate controls if spraying because mists can be inhaled and overspray can create slip hazards.

Ventilation:
Use general ventilation for normal handling.
Use local exhaust or respiratory protection if spraying in enclosed spaces.
Avoid aerosol formation in enclosed spaces without adequate airflow.

Storage:
Store in tightly closed containers in a cool, dry place away from heat and direct sunlight.
Minimize headspace to reduce oxidation and skin formation.
Keep away from strong oxidizers and sources of ignition.

Spill and Leak Procedures:
Contain spill and absorb with inert material.
Clean residue promptly because oils can create slip hazards.
Dispose of waste according to local regulations and facility procedures.

Handling Precautions:
Prevent fire risk from oil-soaked rags because oxidative curing can generate heat, and rags should be laid flat to dry, stored in water, or placed in a closed metal container.
Apply thin coats because Pure Tung Oil cures by oxygen exposure and thick films can remain tacky and cure slowly.
Rotate stock using FIFO practices and maintain tight sealing to preserve quality and predictable drying performance.