# How long can bisulfite converted DNA be stored in 20°C for use in Infinium Methylation arrays?

If stopping after bisulfite conversion, heat-seal the plate, and store samples at -25°C to -15°C for up to 30 days. This information is found in the [Infinium HD Methylation Assay](https://support-docs.illumina.com/ARR/Inf_HD_Methylation/Content/ARR/FrontPages/inf_hd_methylation_pg.htm) and the [Infinium EX Methylation Assay](https://support-docs.illumina.com/ARR/Inf-MSA/Content/ARR/FrontPages/inf_ex_methylation_assay.htm) protocol.

For more information, refer to the following Illumina Knowledge articles:

* [DNA Input Guidelines for Infinium MethylationEPIC Arrays](https://knowledge.illumina.com/microarray/general/microarray-general-reference_material-list/000002679)
* [Infinium EX Methylation DNA input guidelines and compatible bisulfite conversion kits](https://knowledge.illumina.com/microarray/general/microarray-general-reference_material-list/000008604)

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