KARAYA GUM

Karaya gum is a natural vegetable gum exuded from the Sterculia urens tree, primarily found in India. 
Karaya gum is commonly used as a food additive (E416) and in various medical applications.
Karaya gum is also produced from various other species of Sterculia found in India, Africa, Australia, China, and Indochina, but the product is apparently not available separately in commercial amounts. 

CAS Number: 9000-36-6
EINECS Number: 232-539-4

Synonyms: Karaya-gum, KatiloKadayaGumsterculia, RefChem:792637, SterculiaKaraya, gum karayaKulloKuterra, KarayaGum/Sterculiagum;gum karaya from sterculia tree;KARAYAGUM,FCC;KADIYAGUM;Gum karaya from sterculia tree, Tragacanth Indian;KARAYA GUM (STERCULIA URENS ROXB.);katilo;katilogum

Karaya gum is widely used as a thickener, stabilizer, and emulsifier in food, pharmaceutical, and cosmetic applications.
It is a hydrocolloid.
Karaya gum is a complex acidic polysaccharide composed mainly of galactose, rhamnose, and galacturonic acid units.

These other gums may be mixed with that from S. urens. 
Another related gum is produced by species of Cochlospermum.
Karaya gum is a natural polysaccharide (plant gum) obtained from the dried exudate of trees of the genus Sterculia.

Karaya gum also contains acetyl groups, which influence its properties.
This structure gives it high water-binding capacity.
Physically, it appears as a light brown to pinkish powder or granules.

Karaya gum has a characteristic mild odor and forms a viscous, gel-like mass when hydrated.
It is only partially soluble in water but swells strongly.

Karaya gum provides thickening and stabilizing properties, especially in aqueous systems.
Karaya gum increases viscosity even at low concentrations.
This makes it effective in formulations.

Karaya gum is known for its high swelling capacity, absorbing large amounts of water and forming bulky gels.
This contributes to its use as a bulk-forming agent.
It improves texture and mouthfeel.

Karaya gum is stable over a wide pH range, though extreme acidic or alkaline conditions can affect its viscosity.
Karaya gum maintains functionality in many food systems.
This increases versatility.

Karaya gum shows good compatibility with other hydrocolloids, often used in combination with gums like xanthan or guar gum.
This enhances texture control.
This improves formulation flexibility.

Karaya gum is not digested in the human small intestine, functioning as a dietary fiber.
It may have mild laxative effects at higher intake levels.
This contributes to its functional properties.

Karaya gum is best described as a natural plant-derived hydrocolloid with strong thickening, stabilizing, and water-binding properties, widely used across food, pharmaceutical, and cosmetic systems.
Karaya gum is the exudate of Sterculia urens, a tall (30 ft) bushy tree, native to India, where it grows in forests of the eastern and central mountains. 
The trees are tapped and the exudate, which may be several pounds in weight, is collected and sold at auction. 

Karaya gum is cleaned, ground, sized and blended to obtain uniform grades. 
Impurities range from 0.1 to 3% and consist primarily of bark, but other foreign matter may be present. 
The part used is exudate from the bark. 

Karaya gum has a slight vinegar smell.
Karaya gum, also known as Indian gum tragacanth, is a vegetable gum produced as an exudate by trees of the genus Sterculia. 
Chemically, Karaya gum is an acid polysaccharide composed of the sugars galactose, rhamnose and galacturonic acid. 

Karaya gum is used as a thickener and emulsifier in foods, as a laxative, and as a denture adhesive. 
Karaya gum is also used to adulterate Gum tragacanth due to their similar physical characteristics. 
As a food additive it has E number E416.

Karaya gum also shows good film-forming properties, allowing it to create thin, flexible layers when dried.
This is useful in coatings and pharmaceutical applications.
This improves functional versatility.

It exhibits pseudoplastic (shear-thinning) behavior, meaning its viscosity decreases when stirred or pumped.
This makes it easier to process during manufacturing.
This improves handling and processing.

Karaya gum has moderate compatibility with electrolytes, though high salt concentrations can reduce its viscosity.
This affects its performance in some formulations.
Karaya gum demonstrates good stability in storage when kept dry, but hydrated forms can be prone to microbial growth if not preserved.

FEMA: 2605 | KARAYA GUM (STERCULIA URENS ROXB.)
storage temp.: room temp
form: Powder
color: Yellow to Pale Brown
Odor: bland
biological source: plant fluids (Gum karaya)
Cosmetics: Ingredients Functions: BINDING
FRAGRANCE: HAIR FIXING
EMULSION STABILISING
VISCOSITY CONTROLLING

Karaya gum can be obtained from the tree Sterculia urens. 
Karaya gum is a valuable substance and is traditionally tapped by cutting or peeling back the bark, or by making deep gashes at the base of the trunk with an axe. 
These crude methods of extraction often resulted in the death of the tree, but it has been found that application of the plant growth regulator ethephon stimulates the production of gum, and when used in carefully controlled amounts, increases gum yield and enhances healing of the wounds and survival of the tree.

Karaya gum is the dried exudate of Sterculia urens, a tree native to the mountainous regions of central and eastern India. 
Native collectors tap or drill the trees, and after several days collect the exudate in the form of large, irregular tears that may weigh up to several pounds. 
The best quality gum is collected during the hot spell (May to June) that precedes the monsoon. 

The collectors sell the product to dealers who clean and fragment the tears and sort the gum before putting it into export markets. 
Processors in the United States further purify the gum to remove bark, wood fiber, and soil, then grind, size, and blend the material to obtain uniform grades of gum.
A hydrophilic polysaccharide which exudes from certain Indian trees of the genus Sterculia. 

Karaya gum also exhibits very high viscosity at low concentrations, which makes it effective even in small amounts.
Karaya gum forms thick dispersions rather than true solutions.
This improves formulation efficiency.

Karaya gum shows excellent water absorption and swelling behavior, sometimes increasing many times its original volume.
This creates bulky gel-like structures.
This is useful in textural applications.

Unlike some other gums, karaya gum is only partially soluble in water, forming a heterogeneous, colloidal dispersion.
Karaya gum does not dissolve completely.
This gives it unique rheological properties.

Karaya gum has good stability in moderately acidic conditions, making it suitable for products like sauces and dressings.
However, strong acids or prolonged heating can reduce viscosity.
This affects processing limits.

Karaya gum is commonly used in controlled-release pharmaceutical formulations, where its swelling helps regulate the release of active ingredients.
It acts as a matrix-forming agent.
This improves drug delivery performance.

Karaya gum is also used in denture adhesives, where its adhesive and swelling properties help maintain grip.
It forms a sticky gel upon hydration.
This enhances functionality.

In cosmetics and personal care products, it acts as a thickener and stabilizer in creams, lotions, and gels.
Karaya gum improves texture and consistency.
This enhances product feel.

Karaya gum can function as a binder in tablets and lozenges, helping maintain structural integrity.
It improves cohesion of solid formulations.
This supports manufacturing.

Karaya gum is sometimes used in low-calorie or diet foods, as it adds bulk without contributing significant calories.
It behaves as dietary fiber.
Karaya gum is a highly swelling, partially soluble natural hydrocolloid with strong thickening, binding, and stabilizing properties, widely used in food, pharmaceutical, and cosmetic applications.

Karaya gum has a slightly acidic nature, due to the presence of uronic acids in its structure.
This can influence pH in formulations.
This may affect interactions with other ingredients.

Karaya gum is sometimes used in controlled swelling systems, where gradual water absorption is required.
This is important in pharmaceutical and technical applications.
This improves performance control.

Karaya gum can act as a suspending agent, helping keep insoluble particles evenly distributed in liquids.
This prevents sedimentation.
This improves product stability.

Karaya gum is also used in texturizing applications, providing body and mouthfeel in food systems.
It contributes to a thicker, fuller texture.
This enhances sensory properties.

In industrial use, it may require hydration under controlled conditions, as rapid swelling can lead to lump formation.
Proper dispersion techniques are important.
Karaya gum is a versatile natural hydrocolloid with strong swelling, thickening, suspending, and film-forming properties, widely applied in food, pharmaceutical, cosmetic, and technical formulations.

Uses Of Karaya gum:
As denture adhesive; as binder in paper manufacture; as stabilizer, thickener, texturizer, emulsifier in foods; as thickening agent for dyes in textile industry. 
Karaya gum is widely used in the food industry as a thickener and stabilizer.
It provides viscosity and improves texture in products.

In sauces, dressings, and gravies, it is used to increase thickness and prevent separation.
Karaya gum helps maintain a stable emulsion.
This improves product stability.

Karaya gum is applied in dairy products and desserts, such as ice creams and puddings.
It contributes to creamy texture and prevents phase separation.
This improves sensory quality.

Karaya gum is used in confectionery products, including jellies and gummy-type sweets.
Karaya gum provides gel-like structure and chewiness.
This enhances texture.

In low-calorie and diet foods, it is used as a bulking agent due to its high water absorption and fiber-like behavior.
It adds volume without significant calories.
This supports nutritional positioning.

Karaya gum is widely used in pharmaceutical applications, especially in laxative formulations and controlled-release tablets.
Its swelling property helps regulate digestion or drug release.
This improves functionality.

Karaya gum is a key ingredient in denture adhesives, where it forms a sticky gel that helps dentures adhere securely.
It provides long-lasting adhesion.
This improves user comfort.

In cosmetics and personal care products, such as creams, lotions, and gels, it acts as a thickener and stabilizer.
It improves consistency and application.
This enhances product feel.

Karaya gum is also used as a binder in tablets and lozenges, helping maintain structural integrity.
It ensures cohesion of solid products.
This supports manufacturing quality.

Karaya gum is used wherever thickening, stabilizing, binding, and water-absorbing properties are required across food, pharmaceutical, cosmetic, and technical applications.
Karaya gum is also used in beverages, especially fruit drinks and flavored liquids, as a stabilizer and suspending agent.
It helps keep particles evenly distributed.

In bakery products, it is applied to improve dough handling and moisture retention.
Karaya gum contributes to softness and shelf life.
This improves product quality.

Karaya gum is used in processed meat and savory products, where it helps retain moisture and improve texture.
It acts as a binder and stabilizer.
This enhances consistency.

Karaya gum is applied in frozen foods, where it helps control ice crystal formation and maintain texture.
It stabilizes the structure during freezing and thawing.
This improves product stability.

In chewing gum formulations, it can be used as a texturizing and binding agent.
It contributes to chewiness and structure.
This enhances sensory properties.

Karaya gum is used in oral pharmaceutical preparations, such as lozenges and syrups, where it acts as a thickener and soothing agent.
It improves texture and mouthfeel.
This enhances patient acceptability.

Karaya gum is also used in topical pharmaceutical products, such as gels and pastes.
It provides viscosity and controlled consistency.
This improves application.

In cosmetic masks and gels, it acts as a thickening and film-forming agent.
Karaya gum helps create a smooth layer on the skin.
This enhances product performance.

Karaya gum can be used in industrial formulations, such as adhesives and coatings, due to its strong swelling and binding properties.
It contributes to viscosity and adhesion.
Karaya gum is used wherever water-binding, thickening, stabilizing, and adhesive properties are required across a wide range of food, pharmaceutical, cosmetic, and industrial applications.

Safety Profile Of Karaya gum:
Karaya gum is generally considered a low-toxicity natural hydrocolloid, widely regarded as safe when used within approved limits.
It is commonly used as a food additive and dietary fiber.
Its hazard profile is relatively mild.

One of the main effects is its laxative action at higher intake levels, due to its strong water absorption and bulk-forming properties.
Excess consumption may lead to loose stools or gastrointestinal discomfort.
This effect is dose-dependent.

Karaya gum may cause bloating, gas, or mild abdominal discomfort in some individuals, especially when consumed in large amounts.
This is typical for many dietary fibers.
Gradual intake reduces these effects.

There is a potential risk of intestinal obstruction if large amounts are consumed without adequate water.
Because it swells significantly, it must be taken with sufficient fluid.
This is particularly relevant in pharmaceutical use.

Karaya gum can cause allergic reactions in rare cases, especially in occupational exposure.
Symptoms may include skin irritation, respiratory sensitivity, or asthma-like reactions.
This is uncommon but documented.

Skin contact is generally low risk, but prolonged exposure to powder may cause mild irritation or dryness.
This is mainly an occupational concern.
Protective handling is recommended.

Eye contact may cause mechanical irritation, especially from dust particles.
It is not chemically corrosive.
Rinsing with water is sufficient.

Inhalation of fine powder may lead to respiratory irritation, particularly in industrial environments.
Dust control measures are recommended.
Karaya gum is not flammable under normal conditions, but as an organic material it can burn if exposed to high heat.