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https://www.drugs.com/potassium_chloride.html  Data sources include IBM Watson Micromedex (updated 1 May 2019), Cerner Multum™ (updated 2 May 2019), Wolters Kluwer™ (updated 1 May 2019) and others.

https://www.britannica.com/science/ammonium-chloride  WRITTEN BY: The Editors of Encyclopaedia Britannica LAST UPDATED: Apr 4, 2019

https://www.gardeners.com/how-to/fertilizer-ratios/5161.html  By Kathy LaLiberte, Last updated: 2/7/19

https://www.livestrong.com/article/264858-list-of-foods-that-have-sodium-nitrate/  Last updated: 4/13/19

https://pubchem.ncbi.nlm.nih.gov/compound/sodium_nitrate  Last updated: 7/6/2016

Ammonium chloride. (2016). Retrieved from CAMEO Chemicals: cameochemicals.noaa.gov.

Ammonium Chloride Formula. (S.F.). Recovered from softschools: softschools.com.

EMBL-EBI. (2016, February 29). Embl-ebi. Ammonium chloride. Retrieved from ChEBI: ebi.ac.uk.

Encyclopædia Britannica. (2016, April 13). Ammonium chloride (NH 4 Cl). (nh4cl) Retrieved from Encyclopædia Britannica: britannica.com.

Material Safety Data Sheet Ammonium chloride. (2013, May 21). Recovered desciencelab: sciencelab.com.

National Center for Biotechnology Information. (2017, April 22). (2017年4月22日) PubChem Compound Database; CID = 25517; CID 25517 . Recovered from PubChem: pubchem.ncbi.nlm.nih.gov.

Royal Society of Chemistry. (2015). Ammonium chloride. Recovered from chemspider: chemspider.com.

The Chemical Company. (2016). Ammonium Chloride. Retrieved from thechemco: thechemco.com.

The National Institute for Occupational Safety and Health. (2014, July 1). AMMONIUM CHLORIDE Retrieved from cdc.gov.

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The symbol of potassium chloride is KCL, Potassium is a mineral that is found in many foods and is needed for several functions of your body, especially the beating of your heart.

Potassium chloride is used to prevent or to treat low blood levels of potassium (hypokalemia).Potassium levels can be low as a result of a disease or from taking certain medicines, or after a prolonged illness with diarrhea or vomiting.

Physical Properties. Potassium chloride has an approximate pH of 7.0 and is.
soluble in water and alcohol, but not ether. In its natural state at room temperature, it appears as an odorless and colorless crystalline or granular powder. However, it does impart a saline taste

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The symbol of sodium nitrate is NaNO₃, sodium nitrite is a white crystalline solid. Noncombustible but accelerates the burning of combustible materials. If large quantities are involved in fire or the combustible material is finely divided an explosion may result. May explode under prolonged exposure to heat or fire. Toxic oxides of nitrogen are produced in fires. Used in solid propellants, explosives, fertilizers, and for many other uses.

Sodium nitrate is a natural salt made up of sodium, nitrogen and oxygen. It's used in meats not only to enhance flavor and add color, but also as a preservative to prevent bacterial growth and spoilage. Some of these bacteria can be dangerous, such as Clostridium botulinum and Listeria monocytogenes, which cause potentially serious diseases.

This food additive is considered safe, according to Authority Nutrition. But when sodium nitrate interacts with bacteria in meat, it changes chemically, loses one oxygen and becomes sodium nitrite. With time, sodium nitrate can form either nitric oxide, which is a gas, or nitrosamines, which are chemicals known to be carcinogenic to animals. Due to the cancer concerns surrounding notrosamines, the USDA limits the amount of sodium nitrate in meats.

“Sodium nitrate, with a melting point of 306.8 °C and a density of 2.257 G / CM3(at 20 °C) , is a colorless transparent or white microstrip yellow diamond-shaped crystal. Its taste is salty, soluble in water and liquid ammonia, slightly soluble in glycerol and ethanol, easy deliquescence, especially in the presence of a very small amount of sodium chloride impurities, sodium nitrate deliquescence is greatly increased. When it is dissolved in water, the temperature of the solution decreases and the solution is neutral. When heated, sodium nitrate breaks down into Sodium Nitrite and oxygen. Sodium nitrate is combustible and should be stored in a cool, well-ventilated place. Oxidizability, friction or impact with organic matter can cause combustion or explosion. It's irritating, it's not toxic, but it's dangerous.”

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About Ammonium chloride in the fertilizer 

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About Ammonium chloride in the fertilizer 

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The symbol for Ammonium chloride is written NH₄Cl, it is also called sal ammoniac, it’s a white crystalline salt, the solutions of Ammonium chlorine is mildly acidic, it’s the product from the reaction of hydrochloric acid and ammonia. It is found in mineralogical formations, it has also been found in some volcanic vents and ashes.

On the source side, “Ammonium chloride is yielded as a by-product in the ammonia-soda process for making sodium carbonate. It also is produced by reaction of ammonium sulfate and sodium chloride solutions. When mixed with slaked lime (calcium carbonate), ammonia gas is the result.”

And in the terms of use, “Its principal uses are as a nitrogen supply in fertilizers and as an electrolyte in dry cells, and it is also extensively employed as a constituent of galvanizing, tinning, and soldering fluxes to remove oxide coatings from metals and thereby improve the adhesion of the solders. It is a component of many proprietary cold medicines and cough remedies because of its efficacy as an expectorant, and in veterinary medicine, it is used to prevent urinary stones in goats, cattle, and sheep. ”

In terms of physical properties and chemical properties, “Ammonium Chloride are hygroscopic, finely divided, odorless white particles.” (National Center for Biotechnology Information, 2017) and “The compound has a triclinic lattice structure with cubic structure centered in the center. Its molecular weight is 53.490 g / mol, its density is 1.5274 g / mL and the melting and boiling points are 338 ° C and 520 ° C.”

About the effects of Ammonium chloride on humans “Ammonium chloride is extremely poisonous and toxic. Causes damage to organs by ingestion or long-term exposure and is also harmful to eyes. It is not flammable and does not react with other chemicals.” (The National Institute for Occupational Safety and Health, 2014)

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“Fertilizers replace the chemical components that are taken from the soil by growing plants. However, they are also designed to improve the growing potential of soil, and fertilizers can create a better growing environment than natural soil. They can also be tailored to suit the type of crop that is being grown. Typically, fertilizers are composed of nitrogen, phosphorus, and potassium compounds. They also contain trace elements that improve the growth of plants.

The primary components in fertilizers are nutrients which are vital for plant growth. Plants use nitrogen in the synthesis of proteins, nucleic acids, and hormones. When plants are nitrogen deficient, they are marked by reduced growth and yellowing of leaves. Plants also need phosphorus, a component of nucleic acids, phospholipids, and several proteins. It is also necessary to provide the energy to drive metabolic chemical reactions. Without enough phosphorus, plant growth is reduced. Potassium is another major substance that plants get from the soil. It is used in protein synthesis and other key plant processes. Yellowing, spots of dead tissue, and weak stems and roots are all indicative of plants that lack enough potassium.

Calcium, magnesium, and sulfur are also important materials in plant growth. They are only included in fertilizers in small amounts, however, since most soils naturally contain enough of these components. Other materials are needed in relatively small amounts for plant growth. These micronutrients include iron, chlorine, copper, manganese, zinc, molybdenum, and boron, which primarily function as cofactors in enzymatic reactions. While they may be present in small amounts, these compounds are no less important to growth, and without them plants can die.”

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Those are trace elements

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There are lots of chemical elements in the fertilizers, such as nitrogen, phosphorus, potassium, calcium, sodium, manganese, sulfur, boron, copper, iron, molybdenum, zine, and so on. In those elements, I choose boron, iron, and manganese for details research.

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In now society, chemical fertilizer is always used in agriculture, it makes crops grow faster and better, it makes flowers become more beautiful, but sometimes we also worry about, what chemicals are in fertilizer, and whether it will harm our bodies