While I haven't found an actual study about the degradation of CMC, Food Grade CMC is usually regarded with a shelf life of 2 years while dry.
If your CMC is already dissolved in water it may only last a few days before algae form.
CMC won't fermentate, so, unless it gets wet, if there's no trace of algae in the top it's not spoiled but may have a reduced performance after 2 years in storage for food grades and 4 years for industrial grades.
CMC powder is used in ice creams because it works like setter and gelitine.
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25 HUNDRED
Kits were made by Connecticut Valley Arms Otherwise known as CVA
CMC Electronics's population is 1.
CMC Limited was created in 1978.
CMC Electronics was created in 1903.
CMC Markets was created in 1986.
CMC International ended in 2000.
CMC Magnetics was created in 1978.
CMC Markets's population is 2,010.
CMC International was created in 1991.