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Ammonium chloride

CAS Registry Number (CASRN):

۷۴۸۷-۸۸-۹ ,

Units of original limits:

mg/m3 ,

Conc dep:

Y ,


Ammonium chloride ,


NH4Cl ,

CAS Registry Number (CASRN):

۷۴۸۷-۸۸-۹ ,

SAX Number:

ML30MJ2U7I  ,

Units of original limits:

mg/m3 ,

Conc dep:

Y ,

p to m:

2.18662 ,


3 ,

Vapor Pressure:

1 ,

specific gravity:

1.52 ,

state at 25 °C:

S ,

Molar mass (g/mol):

53.49 ,

Density (g/cm3):

1.5274 ,

Melting point (°C):

338 ,

Boiling point (°C):

520 ,

Acidity (pKa):

9.24 ,

solubility in water (g/100g):

244 ,

Solubility in ethanol (mol ):

3.2 ,


Ammonium chloride

Ammonium chloride (NH4Cl)



The Editors of Encyclopædia Britannica



Alternate Title: sal ammoniac


• fluorite

• aqua regia

• salt (NaCl)

• cyanide

• potash

• sulfuric acid

• phosphate

• sulfate

• organometallic compound

• silicic acid

Ammonium chloride (NH4Cl), also called salt ammoniac, the salt ofammonia and hydrogen chloride. Its principal uses are as anitrogen supply in fertilizers and as an electrolyte in dry cells, and it is also extensively employed as a constituent of galvanizing, tinning, andsoldering fluxes to remove oxide coatings from metals and thereby improve the adhesion of the solders. It is a component of many proprietary coldmedicines 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. Ammonium chloride is a colourless crystalline substance. It is highly soluble in water, readily forming a slightly acidic solution. It vaporizes without melting at 340 °C (644 °F) to form equal volumes of ammonia and hydrogen chloride. 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.

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