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== HOW LONG CAN CDS LAST? ==
The duration of the substance in question heavily depends on both the type of container used and the temperature at which it is stored. Specifically, at a relatively low temperature of around 4ºC and when placed in a well-closed glass container—it's crucial to note that metal stoppers or rubber test tubes should never be utilized for this purpose—it can remain viable for as long as six months to 1 year or more without experiencing a significant loss in strength or efficacy. 

However, once the container has been opened, it is essential that it be promptly stored in a refrigerator to maintain its integrity. Additionally, we must keep in mind that CDS tends to lose gas if the container is not filled all the way to the top, which is similar to what occurs with a bottle of soda that has been opened and subsequently resealed. This loss of gas can affect the overall quality and effectiveness of the substance over time. Simple: CDS behaves like the gas of a mineral water bottle , keep the cap tight.