Hygroscopic substances are used to absorb humidity.
Potassium hydroxide is hygroscopic and deliquescent.
A hygroscopic substance absorbs moisture from the air. If an unknown being is being weighed before and after exposure to air, any increase in weight may suggest it is hygroscopic and has absorbed moisture from the air. Additional testing would be needed to confirm this hypothesis.
No, oil is not hygroscopic. Oil does not have a tendency to absorb or attract water molecules from its surroundings like hygroscopic substances do.
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Non-Hygroscopic
Cargo which readily absorbs, contains and gives off moisture, are called hygroscopic cargo. Such cargoes are mainly of vegetable origin, e.g. grain, flour, tobacco, etc, and concentrates, coal etc.
In crystalline form it's non-hygroscopic, or has only slight hygroscopicity. In powder form it is, yes.
Neither toluene nor hexane are hygroscopic, as they do not readily absorb or attract water from the atmosphere. They are both non-polar solvents and typically do not form strong interactions with water molecules.
The hair of the tail of horse is hygroscopic material.
Polyol Ester is also hygroscopic
Hygroscopic substances are used to absorb humidity.
A non-SOLAS vessel of >15m LoA,
Potassium hydroxide is hygroscopic and deliquescent.
As far as I know, the PVC is not hygroscopic, it doesn't absorb the moisture. There are several types of PVC though, so there could be some hygroscopic PVC resin, but I haven't encountered it yet. Normally it is dried by hot air driers, which are not suitable for hygroscopic materials, therefore I assume PVC is not hygroscopic...
No.
Acetone is not known as hygroscopic.