> For the complete documentation index, see [llms.txt](https://knowledge.illumina.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://knowledge.illumina.com/microarray/general/microarray-general-faq-list/000005924.md).

# Can Infinium BeadChips that have been frozen still be used?

Infinium BeadChips that have been frozen should not be used. The beads are held in pits on the surface of the chip by Van der Waals forces and the expansion and contraction caused by temperature extremes can cause the beads to fall out. Additionally, the surface of the beads can be damaged by freezing and the oligos can shear off.

BeadChips are shipped at room temperature and should be stored at 2-8°C upon receipt.

For additional information, see [The correct storage temperature for Infinium BeadChips is 2-8°C](/microarray/general/microarray-general-reference_material-list/000002839.md).

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| *For any feedback or questions regarding this article (Illumina Knowledge Article #5924), contact Illumina Technical Support* [*techsupport@illumina.com*](mailto:techsupport@illumina.com?subject=Question%2FFeedback%20Regarding%20Illumina%20Knowledge%20Article%20#000002839%20-%20Microarray%20\&body=Dear%20Illumina%20Technical%20Support,%0D%0A%0D%0A)*.* |


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