很多人實(shí)際上對(duì)氫氧化鉀這類化學(xué)產(chǎn)品感興趣，也針對(duì)了解過很多，相應(yīng)的出現(xiàn)疑問是正常的，比如“氫氧化鉀是沉淀嗎？”下面就來分析一番吧。

Many people are actually interested in chemical products such as potassium hydroxide and have learned a lot about them. It is normal to have questions, such as "is potassium hydroxide precipitation?" Now let's analyze it.

事實(shí)上，氫氧化鉀易溶于水在水中不是沉淀，而且氫氧化物只有氫氧化鉀、氫氧化鈉、氫氧化鈣、氫氧化鋇這四個(gè)是易溶的，它們都不是沉淀，其它的都可以理解為沉淀。

In fact, potassium hydroxide is easily soluble in water, and it is not precipitation in water, and only potassium hydroxide, sodium hydroxide, calcium hydroxide and barium hydroxide are easily soluble. They are not precipitation, and others can be understood as precipitation.

氫氧化鉀（化學(xué)式：KOH，式量：56.1）白色粉末或片狀固體。熔點(diǎn)380℃，沸點(diǎn)1324℃，相對(duì)密度2.04g/cm3，折射率n20/D1.421，蒸氣壓1mmHg（719℃）。其性質(zhì)與燒堿相似，具有強(qiáng)堿性和腐蝕性，0.1mol/L溶液的pH值為13.5。

Potassium hydroxide (chemical formula: Koh, formula amount: 56.1) white powder or sheet solid. Melting point 380 ℃, boiling point 1324 ℃, relative density 2.04g/cm3, refractive index n20/d1.421, vapor pressure 1mmhg (719 ℃). Its properties are similar to caustic soda, with strong alkalinity and corrosiveness. The pH value of 0.1mol/l solution is 13.5.

在空氣中易吸潮潮解，吸收二氧化碳形成碳酸鉀。溶于約0.6份熱水、0.9份冷水、3份乙醇、2.5份甘油，微溶于乙醚。溶于水、酒精或用酸處理時(shí)會(huì)產(chǎn)生大量熱量。中度毒性，中位致死劑量（大鼠，口服）為1230mg/kg。

It is easy to absorb moisture and deliquescence in the air, and absorb carbon dioxide to form potassium carbonate. Soluble in about 0.6 parts of hot water, 0.9 parts of cold water, 3 parts of ethanol, 2.5 parts of glycerol, slightly soluble in ether. It will generate a lot of heat when dissolved in water, alcohol or treated with acid. Moderate toxicity, median lethal dose (rat, oral) is 1230mg/kg.

鑒別試驗(yàn)：4%樣品溶液鉀鹽試驗(yàn)（IT-27）陽性。

Identification test: the potassium salt test (it-27) of 4% sample solution is positive.

含量分析：準(zhǔn)確稱取試樣約1.5g，溶于40ml新煮沸并冷卻的水中，冷卻15℃，加數(shù)滴酚酞試液（TS-167），用1mol/L硫酸滴定酸。當(dāng)粉紅色消失時(shí)，記錄酸的消耗量，加入幾滴甲基橙試液（TS-148），繼續(xù)滴定持續(xù)粉紅色。記錄滴定所需的酸總量。每M11mol/L硫酸相當(dāng)于56.11mg總堿（以KOH計(jì)）。

Content analysis: accurately weigh about 1.5g of the sample, dissolve it in 40ml of newly boiled and cooled water, cool it to 15 ℃, add several drops of phenolphthalein test solution (ts-167), and titrate the acid with 1mol/l sulfuric acid. When pink disappears, record the consumption of acid, add a few drops of methyl orange test solution (ts-148), and continue to titrate until pink continues. Record the total amount of acid required for titration. Each m11mol/l of sulfuric acid is equivalent to 56.11mg of total alkali (calculated by KOH).

毒性：對(duì)組織有燒灼作用，能溶解蛋白質(zhì)，形成堿性變性蛋白質(zhì)。溶液或灰塵濺到皮膚上，尤其是黏膜上，會(huì)產(chǎn)生軟痂。溶液濃度越高，溫度越高，效果越強(qiáng)。濺入眼內(nèi)不僅會(huì)損傷角膜，還會(huì)損傷眼部深層組織。大允許濃度為0.5mg/m3。

Toxicity: it can burn tissues, dissolve proteins and form alkaline denatured proteins. The solution or dust splashed on the skin, especially on the mucosa, will produce soft scabs. The higher the solution concentration, the higher the temperature, and the stronger the effect. Splashing into the eye will not only damage the cornea, but also damage the deep tissues of the eye. The maximum allowable concentration is 0.5mg/m3.

工作時(shí)，避免接觸皮膚和眼睛。如不慎觸及，用流水清洗損壞部位，然后用5%的醋酸、酒石酸、鹽酸或檸檬酸溶液濕涂；如果濺入人眼，請(qǐng)用流動(dòng)的水或生理鹽水小心地清洗1030分鐘，然后輕拍2%的新卡因或0.5%的地卡因溶液。操作時(shí)應(yīng)穿結(jié)實(shí)布制成的工作服，佩戴橡膠手套、袖口、圍裙、膠鞋等勞保用品，手上涂抹中性疏水油膏。

When working, avoid contact with skin and eyes. If it is accidentally touched, clean the damaged part with running water, and then wet coat it with 5% acetic acid, tartaric acid, hydrochloric acid or citric acid solution; If it splashes into human eyes, please wash it carefully with flowing water or normal saline for 10 to 30 minutes, and then tap 2% neocaine or 0.5% dicaine solution. During operation, wear work clothes made of solid cloth, rubber gloves, cuffs, aprons, rubber shoes and other labor protection products, and apply neutral hydrophobic ointment on your hands.

使用限制：配方嬰兒食品、速凍法式炸土豆、食用酪蛋白酸鹽、GMP；可可粉和加糖可可粉、可可豆粉、可可塊和可可脂蛋糕，5g/kg（以脫脂可可和K2CO3計(jì)）。

Use restrictions: formula baby food, quick-frozen French fries, edible caseinate, GMP; Cocoa powder and sweetened cocoa powder, cocoa bean powder, cocoa block and cocoa butter cake, 5g/kg (calculated by skimmed cocoa and K2CO3).

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The above is the relevant answer to the question. If you want to buy this kind of product, I suggest you learn more about the relevant information in advance to avoid the risk of loss caused by improper purchase or improper use. For more information, please visit the website http://www.hkjzshop.com Consult!