Names | ||
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IUPAC name
Ammonium chloride
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Other names
Sal ammoniac, Salmiac, Nushadir salt, Sal armagnac, Salt armoniack, Salmiak
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Identifiers | ||
3D model (JSmol)
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ChEBI | ||
ChemSpider | ||
ECHA InfoCard | 100.031.976 | |
EC Number |
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KEGG | ||
PubChem CID
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RTECS number |
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UNII | ||
UN number | 3077 | |
CompTox Dashboard (EPA)
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Properties | ||
ClH4N | ||
Molar mass | 53.49 g·mol−1 | |
Appearance | White solid, hygroscopic | |
Odor | Odorless | |
Density | 1.519 g/cm3[1] | |
Melting point | 338 °C (640 °F; 611 K) decomposes, sublimes[1] | |
Boiling point | 520 °C (968 °F; 793 K) | |
Sublimes at 337.6 °C[2] ΔsublH | ||
244 g/L (−15 °C) 294 g/L (0 °C) 383.0 g/L (25 °C) 454.4 g/L (40 °C) 740.8 g/L (100 °C)[3] | ||
Solubility product (Ksp)
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30.9 (395 g/L)[4] | |
Solubility | Soluble in liquid ammonia, hydrazine, Slightly soluble in acetone Insoluble in diethyl ether, ethyl acetate[2] | |
Solubility in methanol | 32 g/kg (17 °C) 33.5 g/kg (19 °C) 35.4 g/kg (25 °C)[2] | |
Solubility in ethanol | 6 g/L (19 °C)[5] | |
Solubility in glycerol | 97 g/kg[2] | |
Solubility in sulfur dioxide | 0.09 g/kg (0 °C) 0.031 g/kg (25 °C)[2] | |
Solubility in acetic acid | 0.67 g/kg (16.6 °C)[2] | |
Vapor pressure | 133.3 Pa (160.4 °C) 6.5 kPa (250 °C) 33.5 kPa (300 °C)[5] | |
Acidity (pKa) | 9.24 | |
-36.7·10−6 cm3/mol[6] | ||
Refractive index (nD)
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1.642 (20 °C)[2] | |
Structure | ||
CsCl, cP2[7] | ||
Pm3m, No. 221 | ||
a = 0.3876 nm
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Formula units (Z)
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1 | |
Thermochemistry | ||
Std enthalpy of formation ΔfH |
−314.43 kJ/mol[5] | |
Standard molar entropy S |
94.56 J/mol·K[5] | |
Specific heat capacity, C | 84.1 J/mol·K[5] | |
Pharmacology | ||
B05XA04 (WHO) G04BA01 (WHO) | ||
Hazards | ||
NFPA 704 |
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Flash point | Non-flammable | |
U.S. Permissible exposure limit (PEL) |
none[8] | |
Related compounds | ||
Other anions | Ammonium fluoride Ammonium bromide Ammonium iodide | |
Other cations | Sodium chloride Potassium chloride Hydroxylammonium chloride | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | ||
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Infobox references | ||
Ammonium chloride is a chemical compound composed of ammonium and chloride ions. It is a colorless crystalline compound. It is used in soldering. It is also used as an electrolyte in the Leclanche cell, a type of primary cell. Ammonium chloride can be deprotonated by strong bases such as sodium hydroxide to produce ammonia gas.It is sublime compound.