### hydroxide:

Potassium hydroxide
* hazardous substance used to remove impurities from chemical products.
* is bases
  - corrosive to tissues
  - somewhat more corrosive than sodium hydroxide
  - toxic substances
* is used as an electrolyte
  - in the electrolyte of alkaline cells
* makes liquid soap
  - soft soaps like shaving creams
* serves as the electrolyte.
* strong alkali and an important industrial chemical.
* very strong base, and is used to control the pH of various substances.
+ Nickel cadmium battery: Batteries
  * A 'nickel cadmium battery' is a secondary cell. It is also known as 'Nicad' or 'Ni-Cd'. It was used for many applications, such as rechargeable phones, flashlights, and other things. Now the nickel metal-hydride battery is being used. Nickel cadmium batteries contain toxic cadmium metal in them. Potassium hydroxide is used as an electrolyte.
+ Potassium, Properties, Chemical compounds: Alkali metals :: Chemical elements
  * Potassium ions are colorless and similar to sodium ions. Potassium chloride can be used as a substitute for table salt. Potassium hydroxide is used in the electrolyte of alkaline cells. Most potassium compounds are nontoxic. If they are toxic, it is because of the anion. Potassium chromate is colored because of the chromate, not the potassium. Potassium chromate is toxic because of the chromate, not the potassium.

Slaked lime
* degrades to calcium carbonate in the air and is considered environmentally safe.
* dissolves a little in water to form lime water.
* is added to many foods to counteract excess acidity
  - an important material in the control of air pollution
  - mixed with sand to produce lime mortar
  - the main ingredient in traditional whitewash
  - used in agriculture for raising the pH of acidic soils

### hygroscopic:

Brake fluid
* Most brake fluid contains chemicals.
* absorbs moisture from the atmosphere
* is hygroscopic
  - intermittently compressed and released in the wheel cylinder or caliper
* tend to absorb water.

### hypersensitivity:

Hypersensitivity reaction
* are possible when using witch hazel topically
  - rare in patients with no prior exposure to aprotinin
  - relevant adverse effects of asparaginase therapy
* can occur to sulfites contained in norepinephrine injection.
* is hypersensitivity.
* occur in some patients.
* require premedication with dexamethasone and diphenhydramine.

### hypersensitivity | hypersensitivity reaction:

Anaphylactic shock
* is an extreme reaction and can in many cases be life threatening
  - characterized by a fall in blood pressure and respiratory distress
  - hypersensitivity reaction
  - rare
  - severe allergy which affects many organs at the same time
  - the most serious kind of allergic reaction and is life-threatening
* is the most severe of all allergic reactions
  - type of allergic reaction
  - result of a person going into shock from an unknown source
  - treated by use of a tourniquet and subcutaneous injections of epinephrine
* life-threatening response to an allergin.
* related to latex exposure can be life threatening.
* severe and possibly fatal allergic reaction
* very serious condition and requires immediate hospital treatment.

### ice skating:

Figure skating
* allows women to compete like Champions while dressed like Cheerleaders.
* are ice skating
  - sports
* difficult, challenging discipline to tackle.
* great sport.
* is all about using the force.
* is an expensive sport and money is always a problem
  - like flying, but it's also like climbing hundreds of stairs in four minutes
  - open to kids beginning at three years of age and moving through various levels
  - the most popular winter sport watched during the Winter Olympics
* multidimensional sport.
* sport for women, run by women
  - that is challenging, and Very rewarding