Hydroxide

Sodium hydroxide is quite hygroscopic.

Sodium hydroxide is used in making soaps.

When you mix hydrochloric acid with sodium hydroxide, you get water and table salt. I wonder if it'd be safe to drink?

If you mix hydrochloric acid with sodium hydroxide, you get water and table salt. Could you drink that without a second thought?

Sodium hydroxide is corrosive.

The products, even those claiming to have so-called "natural" components, can contain mercury, hydroquinone or caustic agents like sodium hydroxide.

Along with iron, which gives it the pretty red color, the sea is being filled with sodium hydroxide (NaOH), aluminum (Al), titanium (Ti), chromium (cr), cadmium (Cd), mercury (Hg), arsenic (As) and other heavy metals that are hazardous to the health, which is having a big effect on the flora and fauna.

A sample of carbon removed from the ocean in the solid form of calcium carbonate and magnesium hydroxide from UCLA's SeaChange program -- now known as Equatic -- in 2023.