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Can gellan gum be sterilized by irradiation? Is it prone to moisture absorption after opening the package?

Can gellan gum be sterilized by irradiation? Is it prone to moisture absorption after opening the package?


Gellan gum cannot be sterilized by irradiation. Experimental verification (e.g., cobalt-60 irradiation) has shown that irradiation severely damages its polysaccharide structure, leading to a significant decline or even complete loss of gel-forming capability. Therefore, microbial control in production must be achieved through strict environmental and process management. CAG employs advanced production processes that can maintain the total bacterial count below 500 CFU/g, with some batches achieving levels below 100 CFU/g.


Although it is a polysaccharide, gellan gum differs significantly from moisture-absorbing polysaccharides like lentinan. Under normal ambient humidity conditions (e.g., 50% RH), the moisture absorption of gellan gum powder after opening the package typically results in a weight gain of less than 1%. Given that it inherently contains about 10% moisture, the impact of moisture absorption on its performance is negligible. Even if the packaging is not tightly sealed, gellan gum is unlikely to clump, hydrate, or degrade due to moisture absorption. It remains stable and suitable for normal use.

For the best hydrocolloid solution tailored to your specific product, please feel free to contact our technical support team at info@cagcolloids.com.


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