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Safe handling & Storage and disposal of ammonium chloride

Safe handling & Storage and disposal of ammonium chloride

Ammonium chloride is a common compound. The white crystalline chemical ammonium chloride is an odorless water-soluble salt, which may be dangerous in the form of solid or smoke. Ammonium chloride is mainly used as an ingredient in fertilizers, accounting for 90% of the substance's global production.

This passage is going to talk about the followings of ammonium chloride:

(1) Definition of ammonium chloride

(2) Safe handling of ammonium chloride

(3) Storage and disposal of ammonium chloride


(1) Definition of ammonium chloride

Ammonium chloride is an inorganic compound with the molecular formula NH4Cl. It is a white crystalline salt and is highly soluble in water. Ammonium chloride solution is weakly acidic. Sal ammonia is the name of the natural, mineralogical form of ammonium chloride.

The earliest mention of ammonium chloride was in China in 554. At that time, ammonium chloride came from two sources: (1) the vents of underground coal fires in Central Asia, especially the Tianshan Mountains (extending from Xinjiang Province in northwestern China to Kyrgyzstan) and Alay (or Alai) in southwestern Kyrgyzstan Mountains, and (2) the fumaroles of the Taftan volcano in southeastern Iran. (Actually, the term ammonium chloride in several Asian languages is derived from the Iranian phrase anosh adur (immortal fire), which refers to underground fires.) Then the ammonium chloride was transported eastward along the Silk Road to China, and then Ship westward to Muslim lands and Europe.

Around 800 AD, Egyptian Arabs discovered ammonium chloride in the soot from burning camel dung. This source has become a substitute for Central Asian countries.


(2) Safe handling of ammonium chloride

Exposure to ammonium chloride is moderately dangerous and can cause irritation, shortness of breath, cough, nausea and headache. Most of the exposure is due to contact with the flue gas form of the chemical (ammonium acid flue gas and Sal ammonia flue gas), which are fine particles dispersed in the air. Smoke can cause severe eye irritation. Continuous exposure can cause asthma-like allergies or affect kidney function. In case of accidental contact, please seek medical attention immediately and take the following first aid measures:

Skin contact: Immediately rinse the skin with water and disinfectant soap, and use emollients on the irritated area.

Eye contact: Rinse with water for at least 15 to 20 minutes. Protect bare eyes.

Ingestion: Rinse mouth thoroughly with water. Don't induce vomiting.

Inhalation: Move to fresh air and give artificial respiration if necessary.

To avoid exposure, it is important to follow proper safety precautions when handling ammonium chloride in the workplace. Train employees on proper handling and storage to prevent accidents. Always wear protective clothing, glasses (goggles preferably) and impermeable gloves. Be sure to wash your hands after operation. Make sure to provide adequate ventilation and eyewashes wherever ammonium chloride is used or handled. If it is contaminated, please put-on clean clothes.

It is also important to monitor the airborne concentration of smoke in the work area. The exposure limit for ammonium chloride is 10mg/m3. If the smoke cannot fall below the recommended level, you must use a NIOSH-approved air purification particulate filter respirator.

In a fire, ammonium chloride can produce toxic gases, including ammonia, hydrogen chloride and nitrogen oxides. Take appropriate firefighting measures.


(3) Storage and disposal of ammonium chloride

Ammonium chloride is hygroscopic and should be stored in a dry, well-ventilated airtight container. Stored separately from ammonium nitrate and potassium chlorate; ammonium chloride also reacts violently with strong oxidants (such as permanganate, lead and silver salts, bromine trifluoride, alkali metals and their carbonates).

This chemical substance is not only harmful to humans, but also known to be toxic to aquatic organisms, so measures must be taken to prevent damage to the environment. Always dispose of ammonium chloride in a closed container in accordance with federal, state, and local environmental regulations to prevent it from entering sewers, drains, and waterways.




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