Chem solution in Brown bottle

在CE程度，其不會要求太深的。

Concentated Nitric acid (HNO3) is easily decomposed by light to give acid gas molecules which might have chocking smell, so it is required to store in brown bottles.

Potassium permanganate (KMnO4) solution is also required to store in the brown bottles, exposing under light may decompose.

2KMnO4(aq)→K2MnO4(aq)+MnO2(aq)+O2(g) (this is not required in CE)

Chlorine blanch, ie sodium hypochlorite may be required to store in brown bottles also, because it decomposes under sunlight:

2NaClO(aq)→2NaCl(aq)+O2(g)

這些是CE最常要求的例子，可參考一下。

Whenever a chemical solution is UV sensitive or photoreactive , it must be stored in a brown glass bottle otherwise it will react to change to a different chemical in a short time . Such are chlorine water , bromine water , iodine solution , H2O2 , quine solution , silver nitrate , potassium permanganate , ..............& etc . Cannot list out all !!

I just know two Conc. HNO3 and MnO4-
brown bottles are used to reduce the rate of decomposition