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XANTHAN GUM APPLICATIONS

Due to the extraordinary properties as stabiliser and thickener xanthan gum is used in the food, cosmetic and pharmaceutical industry. Also, xanthan gum is used in various industrial applications and for oil drilling. In all these areas xanthan gum is accepted as an excellent stabiliser and a useful processing aid.

Food Applications

In pourable salad dessings xanthan gum has proven to be an ideal stabiliser. The three-dimensional network formed by the xanthan gum molecules prevents oiling off and separation of insoluble solid particles. Further, the shear-thinning flow behavior contributes to mixability, pumpability and pourability of industrially produced dressings. The rheological properties of xanthan gum together with its high tolerance towards acids and salts guarantee a long shelf life for these oil-in-water emulsions.

In the bakery industry xanthan gum is used to increase water binding during baking and storage and extends the shelf life of baked goods and refrigerated doughs. In soft baked goods xanthan gum can also be used as an egg replacement, in particular the egg-white content can be reduced without affecting appearance and taste. Small amounts of xanthan gum give higher baking volume in cakes. Solid particles like raisins and nuts are prevented from settling during baking. Gluten-free bread can be baked with xanthan gum while still providing a fine-pored structure and elastic surface.

In beverages xanthan gum effectively suspends insoluble particles for long periods of time. Xanthan gum imparts enhanced mouthfeel with full-bodied taste and good flavor release. For the stabilisation of fruit pulp it is recommended to use xanthan gum in combination with other hydrocolloids e.g. CMC. Because of its solubility in both hot and cold media and its excellent stabilising performance, xanthan gum can be used in almost every instant product, e.g. soups and sauces, desserts, instant drinks and toppings.

Many of today's prepared foods, semi-prepared food and convenience foods take advantage of the stabilising properties of xanthan gum. In order to obtain a specific flow behavior and texture xanthan gum if often used in combination with other hydrocolloids.

In soups, sauces and gravies xanthan gum provides a uniform viscosity over a wide temperature range. When the sauces are added to spaghetti, potato-chips etc. the presence of xanthan gum imparts good cling and prevents separation of the sauce.

In frozen foods xanthan gum imparts excellent stability and water retention during several freeze/thaw-cycles and reduces the uncontrolled formation of ice-crystals. In combination with other hydrocolloids xanthan gum gives a smooth texture and improved shelf life.

The dairy industry uses xanthan gum in a variety of applications. Xanthan gum is often used in combination with carrageenan or other hydrocolloids to stabilise milk shakes, yoghurts and dairy desserts. The pseudoplastic properties of xanthan gum facilitate the production of cheese spreads, and together with galactomannans it is used in cream dressings for cottage cheese to avoid syneresis.

Xanthan gum provides emulsion stability and water retention to different kind of toppings and ensures both an excellent flow and a good cling.

The meat industry uses xanthan gum in preparation of pâté and sauces. In countries where direct treatment of meat products is permitted, it is used in blends of stabilisers for sausages and brine solutions for ham injection.

Xanthan gum is widely used in low-calorie products to bind water and to improve texture and mouthfeel without adding caloric value.

Personal Care Applications

Xanthan gum is an ideal stabiliser for various types of tooth pastes, e.g. gels or pumpable types. It provides uniformity and stability to the tooth paste, makes it easy to be pumped or squeezed and gives a consistent and smooth string. Xanthan gum can be used as an emulsions stabiliser and water-binder in creams and lotions. It imparts high viscosity at low concentrations and enables pastes and creams to hold their shape. In shampoos xanthan gum is used to adjust the viscosity and flow properties and it suspends insolubles such as pigments or other active ingredients in medicated shampoos.

Pharmaceutical Applications

Xanthan gum is an excellent stabiliser for pharmaceutical formulations. It uniformly suspends water-insoluble ingredients, e.g. barium sulphate in X-ray contrast media and perfectly stabilises all kinds of pharmaceutical emulsions. In lozenges xanthan gum prolongs the contact time of the active ingredient, in tablets xanthan gum can be used to create a retarded drug release effect.

Industrial Applications

The agrochemical industry uses xanthan gum as stabiliser in flowables. Xanthan gum has good suspending properties, controls the size of droplets and prevents drifting. It also imparts good cling thus increasing the contact time between the active ingredient and the crop.

As a thickening agent with high pH stability xanthan gum is able to thicken acid and alkaline cleaners, e.g. toilet cleaners. Its pseudo-plasticity increases the cling to vertical surfaces and extends contact time.

Xanthan gum is also useful for suspending abrasive components in metal polishes and to stabilise polish emulsion.

In water based paints xanthan gum is used to stabilise the pigments and to control the flow properties of the paint.

In textile and carpet printing pastes xanthan gum is used to control fine-line and colour migration. Its temperature stability and pseudo-plastic properties improve space printing and dyeing processes.

The viscosity of water based adhesives can easily be adjusted by small amounts of xanthan gum. Its rheological properties facilitate handling during application.

In the paper industry xanthan gum can be used as suspension aid and for rheology control.

Xanthan gum can be used in water based printing inks to provide the proper viscosity during application, to control penetration and to increase stability.

Xanthan gum is an excellent suspending aid for ceramic glazes and many other hard-to-suspend mixtures.

The oil industry uses xanthan gum in oil well drilling fluids, well completion and fracturing fluids and as a mobility control agent in flooding operations for enhanced oil recovery.

Applications in Animal Feed

In liquid milk-replacers for calves and piglets xanthan gum is used to stabilise the suspension of insoluble substances.

Xanthan gum is often used in combination with locust bean gum and guar gum as stabiliser and binder in the formulation of canned gravy-based pet food.