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Refined Linseed Oil is currently one of the highest known vegetable oils with the highest content of essential fatty acids (omega-3 and omega-6 fatty acids).
Refined Linseed Oil is used in paints, varnishes, oilcloth, putty, printing inks, core oils, linings, and packings, alkyd resins, soap, and pharmaceuticals.
Refined linseed oil is a purified form of linseed oil obtained from the seeds of the flax plant and is composed mainly of triglycerides rich in polyunsaturated fatty acids.
CAS Number: 8001-26-1
EINECS Number: 232-278-6
Synonyms: OIL OF LINSEED;aceitedelinaza;Flaxoil;groco;huiledelin;LINUM USITATISSIMUM (LINSEED) SEED OIL;LINSEED OIL INSECT CELL CULTURE TESTED;LINSEED(FLAXSEED)OIL, 1000MG, NEAT
Refined Linseed Oil appears as a pale yellow to light amber liquid with reduced odor and improved clarity compared to crude linseed oil.
The refining process removes impurities such as free fatty acids, phospholipids, pigments, and waxes that can affect stability and performance.
During refining, the oil typically undergoes steps such as degumming, neutralization, bleaching, and deodorization to improve its chemical and physical properties.
These treatments enhance oxidative stability and consistency while minimizing undesirable color and smell.
As a result, refined linseed oil is more suitable for controlled industrial and formulation uses than unrefined grades.
Chemically, refined linseed oil is characterized by a high content of linolenic acid, which gives it strong drying properties when exposed to air.
This tendency to polymerize through oxidation allows it to form solid films over time.
Because of this behavior, refined linseed oil is valued as a functional oil rather than a nutritional one in most applications.
Also known as Refined Linseed Oil is golden yellow, amber, or brown drying oil with a peculiar odor and bland taste.
Refined Linseed Oil, polymerizes on exposure to air.
Soluble in ether, chloroform, carbon disulfide, and turpentine; slightly soluble in alcohol, spontaneous heating.
Chief constituents are glycerides of linolenic, oleic, linoleic, and saturated fatty acids.
The drying property is due to the linoleic and linolenic groups.
Derivation is from seeds of the flax plant Linum usitatissimum by expression or solvent extraction.
Various refining and bleaching methods are used.
The grades of linseed oil are raw; boiled, double-boiled, blown, varnish makers' and refilled.
Refined Linseed Oil is an pale yellow oil extracted from the seeds of flax (linseed).
It hardens on exposure to air (it is a drying oil) because it contains linoleic acid and linolenic acid, and is used in enamels, oilpaints, putty, linoleum and varnishes.
Refined Linseed Oil is a slime free refined oil produced from raw linseed oil, won by a refining process going over the steps of degumming, neutralising and bleaching.
Refined Linseed Oil is used for the production of oil modified polyester resins (i.e. alkyd resins), stand oils, printing varnishes, maleat and urethane oils in the synthetic resins, coatings and printing ink industry. It also finds application as a binder in pigment pastes.
Refined Linseed Oil, also known as flaxseed oil or flax oil (in its edible form), is a colorless to yellowish oil obtained from the dried, ripened seeds of the flax plant (Linum usitatissimum).
The oil is obtained by pressing, sometimes followed by solvent extraction.
Owing to its polymer-forming properties, linseed oil is often blended with combinations of other oils, resins, or solvents as an impregnator, drying oil finish, or varnish in wood finishing; as a pigment binder in oil paints; as a plasticizer and hardener in putty; and in the manufacture of linoleum.
Refined Linseed Oil use has declined since the 1950s with increased availability of synthetic alkyd resins, which function similarly, are petroleum-based, and resist yellowing.
Refined Linseed Oil is a pale oil extracted from the seeds of the flax plant.
When mixed with oil paint, linseed oil will increase the gloss and transparency of the paint and will thin the paint so that it flows more easily and does not hold brush marks.
Refined Linseed Oil will also slow the drying time of the paint.
It is also highly suitable for use with dry ground pigments.
Refined Linseed Oil is linseed oil that has been extracted without any processing.
Refined Linseed Oil takes much longer to dry than refined linseed oil.
Refined Linseed Oil comes from flax seeds which are harvested from the same flax plant that produces the fibers used to make linen.
Artists have been using linseed oil for centuries to make paints, mediums and varnishes.
Refined Linseed Oil is widely used today, not only in artist materials, but also for a wide range of industrial applications.
Melting point: −24.0 °C
Boiling point: >316 °C
Density: 0.93 g/mL at 25 °C (lit.)
Refractive index: n²⁰/D 1.4795 (lit.)
Flash point: >230 °F
Storage temp.: Room temperature
Odor: Bland
Dielectric constant: 3.2–3.5 at 0.0 °C
Refined Linseed Oil react with acids to liberate heat.
Heat is also generated by interaction with caustic solutions.
Strong oxidizing acids may cause a vigorous reaction that is sufficiently exothermic to ignite the reaction products.
Flammable hydrogen is generated by mixing with alkali metals and hydrides.
React with oxygen in the air to harden.
Can react with air fast enough to cause ignition of near-by combustible material if the heat builds up in an unventilated space (called "spontaneous combustion" in oily rags).
Pressed from American flax seeds.
This is as light and pure as industrially produced lRefined Linseed Oil can be made. Use in moderation to thin oil colors or as an ingredient in traditional painting mediums.
In industrial applications, refined linseed oil is widely used as a drying oil due to its ability to undergo oxidative polymerization when exposed to air.
This property allows it to form tough, flexible films that adhere well to surfaces and provide protective coatings.
As a result, it is commonly incorporated into paints, varnishes, printing inks, and wood finishes.
Compared to raw or Refined Linseed Oil, the refined form offers greater uniformity and improved storage stability.
The removal of reactive impurities reduces the risk of premature oxidation, sludge formation, and unpleasant odors during use.
This makes refined Refined Linseed Oil more predictable and reliable in large-scale manufacturing processes.
From a materials and formulation perspective, refined linseed oil can also act as a plasticizer or binder in certain polymeric and composite systems.
Refined Linseed Oil improves flow properties and film formation while maintaining compatibility with a wide range of resins and pigments.
Its natural origin combined with functional performance makes it attractive for applications seeking partially bio-based raw materials.
Although refined linseed oil can technically be consumed, it is generally not intended for food use unless specifically processed and certified for that purpose.
Industrial grades may contain trace residues from refining that make them unsuitable for ingestion.
Therefore, its primary value lies in technical, chemical, and surface-coating applications rather than nutrition.
Refined Linseed Oil, also called flaxseed oil, is known as one of the best hardwood oils for outdoor furniture.
There are many linseed oil variations on the market: refined, boiled, and raw. We recommend using refined oil as it has a faster drying time than natural oil and is safer to use in all climates than boiled linseed oil.
However, Refined Linseed Oil is similar and can be used; though, it might require more applications during the summer months.
Refined Linseed Oil can be purchased on its own or as part of the Outdoor Interiors Maintenance Kit.
Like linseed oil, Teak oil works wonders on many types of outdoor hardwood.
If you treat unstained teak, always test an inconspicuous area as most linseed and teak oils will darken natural unstained teak.
Refined Linseed Oil is the carrier used in oil paint.
Refined Linseed Oil can also be used as a painting medium, making oil paints more fluid, transparent and glossy.
Refined Linseed Oil is available in varieties such as cold-pressed, alkali-refined, sun-bleached, sun-thickened, and polymerised (stand oil).
The introduction of linseed oil was a significant advance in the technology of oil painting.[citation needed]
Having a high content of di- and tri-unsaturated esters, linseed oil is susceptible to polymerization reactions upon exposure to oxygen in air.
This polymerization, which is called autoxidation, results in the rigidification of the material.
To prevent premature drying, linseed oil-based products (oil paints, putty) are stored in airtight containers.
Rags soaked with linseed oil pose a fire hazard because they provide a large surface area for rapid oxidation.
The oxidation of linseed oil is exothermic, which may lead to spontaneous combustion.
In 1991, One Meridian Plaza, in Philadelphia, was severely damaged in a fire, in which three firefighters perished, thought to be caused by rags soaked with linseed oil.
Uses:
The botanical properties of Refined Linseed Oil are listed as emollient, antiinflammatory, and healing.
Derived from the flax plant seed, the oil is obtained by expression with little or no heat.
Refined Linseed Oil is a drying oil, meaning it can oxidise into a solid form.
Due to this property, Refined Linseed Oil is used on its own or blended with other oils, resins, and solvents as an impregnator and varnish in wood finishing, as a pigment binder in oil paints, as a plasticizer and hardener in putty, and in the manufacture of linoleum.
Refined Linseed Oil is still widely used for the finishing and refinishing of furniture and timber products.
Refined linseed oil is extensively used in the coatings industry as a key component in paints, varnishes, and lacquers due to its strong film-forming and drying properties.
When exposed to air, it polymerizes to form a hard and protective layer that enhances surface durability.
This makes it especially suitable for wood, metal, and decorative surface coatings.
In printing inks and graphic applications, Refined Linseed Oil functions as a binder that improves pigment dispersion and ink flow.
It contributes to smooth application, controlled drying behavior, and good adhesion to paper and other substrates.
Its consistent quality after refining ensures uniform color development and print performance.
In wood treatment and furniture finishing, refined linseed oil is used to protect surfaces from moisture, wear, and environmental exposure.
Refined Linseed Oil penetrates wood fibers, enhancing grain appearance while forming a breathable protective layer.
This use is common in both industrial furniture production and restoration applications.
Refined Linseed Oil is also applied in industrial formulations as a plasticizer, lubricant additive, or intermediate raw material.
It improves flexibility, processing behavior, and compatibility in certain resin, rubber, and composite systems.
Its renewable origin makes it attractive for partially bio-based and environmentally conscious material designs.
In construction and building materials, refined linseed oil is used in the production of linoleum flooring, where it reacts with fillers and pigments to form a durable and resilient surface material.
Its oxidative curing behavior contributes to the hardness and longevity of the final product.
This application has been established for decades due to the oil’s reliability and performance.
In metalworking and corrosion protection, Refined Linseed Oil is applied as a temporary protective coating to prevent rust formation on metal surfaces during storage or transport.
It forms a thin hydrophobic film that limits contact between metal and moisture.
This use is particularly relevant for tools, machinery parts, and steel components.
In artistic and restoration practices, Refined Linseed Oil is widely used as a medium and modifier in oil-based paints.
It improves paint flow, gloss, and leveling while influencing drying time and film flexibility.
Artists and conservators value refined grades because they yellow less and provide more consistent aging behavior than raw oils.
In specialty chemical and polymer applications, Refined Linseed Oil serves as a renewable feedstock for the synthesis of modified oils, alkyd resins, and bio-based additives.
It can be chemically altered through epoxidation or polymerization to create materials with tailored properties.
These derivatives are increasingly used in sustainable coatings, adhesives, and composite systems.
Safety Profile:
Refined Linseed Oil is non-toxic and completely food-safe.
It is often given as a health supplement in both people and animals, including dogs, horses, and more.
Refined Linseed Oil is flammable.
If used and stored correctly, there is very little risk of linseed oil spontaneously combusting.
However, the fire hazard increases under certain circumstances.
Be very careful with rags that have been used to apply linseed oil.
In many cases of spontaneous combustion of drying oils the cause has been a pile of oil soaked rags.
As the oil oxidizes it generates heat.
The rags act as an insulator, allowing the heat to build up until the cloth smokes and eventually ignites.
The bigger the pile, the greater the possible heat and the greater the risk.
Refined Linseed Oil is used rags should be stored in a metal can with a top and soaked with water to limit the risk of fire since the drying process is exothermic.
