What Is the Connection Between Sulfuric Acid and Potassium Hydroxide?

Potassium hydroxide (chemical formula: KOH, formula: 56.1) white powder or flaky solid. The melting point is 380 ° C, the boiling point is 1324 ° C, the relative density is 2.04g / cm ³ , the refractive index is n20 / D1.421, and the vapor pressure is 1mmHg (719 ° C). Its properties are similar to caustic soda, with strong alkalinity and corrosivity. The pH of a 0.1mol / L solution is 13.5. It easily absorbs moisture in the air and deliquesces, and absorbs carbon dioxide into potassium carbonate. It is soluble in about 0.6 parts of hot water, 0.9 parts of cold water, 3 parts of ethanol, 2.5 parts of glycerin, and slightly soluble in ether. A large amount of heat is generated when dissolved in water, alcohol or treated with acid. Moderately toxic, half lethal dose (rat, oral) 1230mg / kg.

Strongly alkaline and corrosive. Absorb carbon dioxide into potassium carbonate. The pH of the 0.1 mol / L solution was 13.5. White orthorhombic crystals, industrial products are white or light gray blocks or rods. Soluble in water, soluble in ethanol, slightly soluble in ether. ^[1]

1.Used as

1. Raw materials for diaphragm electrolysis

Approximately 1.5g of the sample was accurately weighed, dissolved in 40ml of freshly boiled and cooled water, cooled to 15 ° C, added a few drops of phenolphthalein test solution (TS-167), and titrated with 1mol / L sulfuric acid. When the pink disappears, record the amount of acid consumed, add a few drops of the methyl orange test solution (TS-148), and continue the titration until a pink color that persists. Record the total volume of acid required for the titration. 1 mol / L sulfuric acid per Ml is equivalent to 56.11 mg of total alkali (calculated as KOH). ^[1]

It has cauterizing effect on tissues, can dissolve proteins and form alkaline denatured proteins. Splashes of solution or dust on the skin, especially on the mucous membranes, can cause soft palate. The higher the solution concentration, the higher the temperature and the stronger the effect. Splashing into the eye can not only damage the cornea, but also damage the deep tissue of the eye. ^[7]

1. Ecological toxicity TLm: 80ppm (24h) (

1. Mass of single isotope: 55.966447 Da

2. Nominal mass: 56 Da

3. Average mass: 56.1056 Da ^[8]

1, easy deliquescent. When exposed to air, it easily absorbs carbon dioxide and moisture and gradually turns into potassium carbonate. Easily soluble in water, it releases a lot of heat of dissolution when dissolved, has strong water absorption, can absorb water in the air to dissolve, and absorb carbon dioxide to gradually become potassium carbonate. Soluble in ethanol, slightly soluble in ether. It is extremely alkaline and corrosive, and its properties are similar to caustic soda. Can cause burns. Easily absorb moisture and CO2 in the air.

2. Stability: stable

3. Incompatible materials: strong acid, flammable or combustible, carbon dioxide, acid anhydride, acid chloride

4. Conditions to avoid: humid air

5. Hazard of polymerization: no polymerization

6. Decomposition products: potassium oxide ^[9]

Invasion route: inhalation, ingestion.

Health hazard: This product is strongly corrosive. Strongly irritates the airways or causes burns after inhalation. Direct skin and eye contact can cause burns; oral burns can damage the digestive tract and can be fatal.

Chronic effects: lung damage.

Acute toxicity: LD50273mg / kg (rat orally).

Irritation: rabbit eyes: 1% severe irritation. Transdermal rabbit: 50mg (24 hours), severe irritation.

Hazardous characteristics: The product will not burn, it will generate a lot of heat when it encounters water and water vapor, forming a corrosive solution. With acid

Skin contact: Remove contaminated clothing immediately and rinse with plenty of running water for at least 15 minutes. Seek medical attention.

Eye contact: Lift immediately

1. Transportation precautions: When railroad transportation, steel drums can be transported in open cars. The package should be complete at the time of shipment and the loading should be secure. During transportation, ensure that the container does not leak, collapse, fall, or damage. It is strictly prohibited to mix and transport with flammable or combustible materials, acids, edible chemicals, etc. The transportation vehicle should be equipped with leakage emergency treatment equipment during transportation;

2. Precautions for storage: Store in a cool, dry, well-ventilated warehouse. Keep away from fire and heat sources. The humidity in the warehouse is preferably not more than 85%. The packaging must be sealed and protected from moisture. It should be stored separately from flammable (flammable) materials, acids, etc., and should not be mixed. The storage area should be equipped with suitable materials to contain the spill;

3. Packaging method: solid can be tightly sealed in 0.5 mm thick steel drums, the net weight of each barrel does not exceed 100 kg; plastic bags or two-layer kraft paper bags with full or middle opening steel drums; threaded glass bottles, iron caps Ordinary wooden boxes outside pressured glass bottles, plastic bottles or metal barrels (tanks); threaded glass bottles, plastic bottles or tin plated steel barrels (tanks) outside full-floor grate boxes, fiberboard boxes or plywood boxes; Steel drums (tanks), metal drums (tanks), plastic bottles or corrugated cardboard boxes with metal hoses. ^[10]