Xanthan gum
[CAS# 11138-66-2]

Identification

• Classification: Biochemical >> Carbohydrate >> Polysaccharide
• Name: Xanthan gum
• Molecular Formula: (C₃₅H₄₉O₂₉)_n
• CAS Registry Number: 11138-66-2
• EC Number: 234-394-2

Safety Data

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Skin irritation	Skin Irrit.	2	H315
Eye irritation	Eye Irrit.	2	H319
Skin sensitization	Skin Sens.	1	H317

Discovery and Applications

Xanthan gum is a polysaccharide produced by the fermentation of sugars by the bacterium *Xanthomonas campestris*. It is a complex carbohydrate composed of glucose, mannose, and glucuronic acid, and it is renowned for its unique thickening and stabilizing properties. The discovery of xanthan gum dates back to the 1960s when researchers were investigating ways to utilize microbial fermentation for producing useful compounds. The substance was first commercialized in the early 1970s, gaining attention for its versatility in food and industrial applications.

The production of xanthan gum involves the fermentation of carbohydrates, such as glucose or sucrose, by *Xanthomonas campestris*. The bacteria secrete the gum as a protective mechanism against environmental stress. Following fermentation, the gum is precipitated with isopropanol, dried, and milled into a fine powder, which can be easily reconstituted in water. The process allows for the production of high-quality xanthan gum on a large scale, contributing to its widespread adoption across various industries.

One of the most significant applications of xanthan gum is in the food industry. It is used as a thickener, stabilizer, and emulsifier in a wide range of products, including salad dressings, sauces, dairy products, and gluten-free baked goods. Xanthan gum enhances the texture and viscosity of food products, improving mouthfeel and preventing ingredient separation. Its ability to maintain viscosity over a wide range of temperatures and pH levels makes it particularly valuable in food formulation. Additionally, xanthan gum can be used in low-fat products as a fat replacer, allowing for a creamy texture without the added calories.

Beyond the food industry, xanthan gum finds applications in pharmaceuticals and cosmetics. In pharmaceuticals, it is utilized as a suspending agent and stabilizer in liquid formulations, ensuring uniform distribution of active ingredients. Its biocompatibility and non-toxic nature make it suitable for use in various topical and oral medications. In cosmetics, xanthan gum serves as a thickening agent in creams, lotions, and gels, enhancing product stability and improving sensory properties.

Xanthan gum is also widely used in the oil and gas industry for hydraulic fracturing and drilling fluids. Its exceptional viscosity and shear-thinning properties allow for effective fluid transport in drilling operations, improving the efficiency of oil extraction. The gum helps to suspend solid particles, stabilize emulsions, and control fluid loss during drilling, making it a critical component in the industry.

Despite its numerous benefits, xanthan gum can pose certain challenges. Some individuals may experience gastrointestinal discomfort when consuming large amounts of xanthan gum, particularly in food products. Regulatory agencies have established guidelines for its safe use in food and pharmaceuticals, ensuring that it remains a safe ingredient for consumers.

In summary, xanthan gum is a valuable polysaccharide with diverse applications in food, pharmaceuticals, cosmetics, and the oil industry. Its discovery in the 1960s marked the beginning of its journey as an essential ingredient in various formulations. As research continues to explore its potential uses, xanthan gum is likely to remain an important component in many industrial processes.

References

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