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Properties and uses of potassium hydroxide

Properties and uses of potassium hydroxide

Do you know what potassium hydroxide is? What properties does it have? Is Potassium Hydroxide Toxic? What if we accidentally come into contact with potassium hydroxide? The following is an introduction to potassium hydroxide, let us understand it together.

Potassium hydroxide (chemical formula: KOH), commonly known as caustic potash, white solid potassium hydroxide is soluble in water and alcohol, but insoluble in ether. It is easy to absorb moisture and deliquescence in the air. Can react with carbon dioxide to produce potassium carbonate. So, it will be used to absorb carbon dioxide. Volatile but not decomposed at high temperature. Often used as a source of laboratory hydroxide.

                                 

Properties of Potassium Hydroxide:

Potassium hydroxide has the general property of alkali, is easily soluble in water, and has strong corrosiveness. It is often used to prepare potassium carbonate. Solid potassium hydroxide is a white orthorhombic crystal. Water gives off a lot of heat. Strong irritation to respiratory tract or burns after inhalation. Direct contact with the skin and eyes can cause burns. Once the eyes or skin come into contact with potassium hydroxide, quickly flush the injured area with water for more than 15 minutes; oral administration will burn the digestive tract and can be fatal.

  CAS No.: 1310-58-3

  Chemical formula: KOH

  Molecular weight: 56.11

  Physical and chemical properties

  Main ingredient: KOH

  Industrial products Grade 1≥90.0%; Grade 2≥88.0%.

  Appearance and Properties: White crystals, easy to deliquescence.

Melting point (℃): 360.4

  Boiling point (℃): 1320

Relative density (water=1): 2.04

  Saturated vapor pressure (kPa): 0.13(719℃)

Solubility: Soluble in water, ethanol, slightly soluble in ether, soluble in water and releasing a lot of heat, easily soluble in alcohol and glycerin. Melting point 360.4 ℃. Its chemical properties are similar to sodium hydroxide (caustic soda), and its aqueous solution is colorless and strongly alkaline, which can destroy cell tissue.

Main uses and hazards:

Potassium hydroxide is used as a raw material for chemical production, and the potassium hydroxide production method is also used in medicine, dyes, light industry and other industries, but its hazards cannot be ignored, so what are the hazards?

Health Hazards: This product is highly corrosive. Dust irritates the eyes and respiratory tract, and corrodes the nasal septum; direct contact with the skin and eyes can cause burns; mistaken consumption can cause burns in the digestive tract, mucosal erosion, hemorrhage, and shock.

 Routes of entry: inhalation, ingestion, contact

      Chronic Effects: Lung damage, visual impairment, olfactory impairment.

  Environmental hazards: It can cause pollution to water bodies.

  Explosion hazard: This product is non-flammable, highly corrosive and highly irritating, which can cause burns to the human body.

  Hazardous characteristics: Neutralization reaction with acid and exothermic, it is extremely easy to produce violent explosion due to exothermic in solution state. This product will not burn, it will release a lot of heat in contact with water and water vapor, forming a corrosive solution, which is highly corrosive.

Emergency treatment and disposal methods:

Potassium hydroxide is very dangerous. What should we do if we accidentally leak or come into contact with potassium hydroxide?

1. Emergency treatment of leakage

Isolate the leaked pollution area, and set up warning signs around it. It is recommended that emergency personnel wear gas masks and chemical protective clothing. Do not directly touch the spill, collect it in a dry, clean, covered container with a clean shovel, add a small amount to a large amount of water, or introduce carbon dioxide or weak acid, adjust to neutrality, and then put it into the waste water system. It can also be washed with a large amount of water, or carbon dioxide or weak acid can be introduced, and the diluted washing water can be put into the waste water system. If there is a large amount of leakage, it should be discarded after collection and recycling or harmless disposal.

2. Protective measures

  Respiratory protection: Wear a gas mask if necessary.

  Eye Protection: Wear chemical safety goggles.

  Protective clothing: Wear work clothes (made of anti-corrosion materials).

  Hand Protection: Wear rubber gloves (synthetic rubber).

  Others: After work, shower and change. Pay attention to personal hygiene.

3. First aid measures

Skin contact: Immediately flush the wound with water for at least 15 minutes. Conditionally wash the wound with mild acid (eg acetic acid, boric acid). If burns occur, seek medical attention.

Eye Contact: Immediately lift eyelids and flush with running water or saline for at least 15 minutes. Or rinse with 3% boric acid solution. seek medical attention.

Inhalation: Get out of the scene quickly to fresh air. Provide artificial respiration if necessary. seek medical attention.

Ingestion: When the patient is awake, rinse his mouth immediately, take orally diluted vinegar or lemon juice, and seek medical attention. Extinguishing methods: mist water, sand, carbon dioxide.

Emergency treatment: Isolate the leaked contaminated area and restrict access. It is recommended that emergency personnel wear dust masks (full face masks) and protective clothing. Do not allow spillage to come into contact with reducing agents, organics, flammables or metal powders. Do not come into direct contact with spillage. Small spills: Collect with a clean shovel in a dry, clean, covered container. Large spill: Collect for recycling or transport to waste disposal site for disposal.

Potassium hydroxide is a hazardous item, it is highly corrosive, although potassium hydroxide has been used in many aspects, but everyone must pay attention when using potassium hydroxide, so as not to cause harm.

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