What is Ammonium chloride?
{{chembox | Watchedfields = changed | verifiedrevid = 477003841 | ImageFile = NH4Cl.png | ImageSize = 150px | ImageName = Unit cell of ammonium chloride | ImageFile1 = Ammoniumchlorid Kristalle.jpg | ImageName1 = Crystalline ammonium chloride | IUPACName = Ammonium chloride | OtherNames = Sal ammoniac, Salmiac, Nushadir salt, Sal armagnac, Salt armoniack, Salmiak |Section1={{Chembox Identifiers | UNII_Ref = {{fdacite|correct|FDA}} | UNII = 01Q9PC255D | UNNumber = 3077 | KEGG_Ref = {{keggcite|correct|kegg}} | KEGG = D01139 | InChI = 1/ClH.H3N/h1H;1H3 | ChEBI_Ref = {{ebicite|correct|EBI}} | ChEBI = 31206 | SMILES = [Cl-].[NH4+] | InChIKey = NLXLAEXVIDQMFP-UHFFFAOYAI | StdInChI_Ref = {{stdinchicite|correct|chemspider}} | StdInChI = 1S/ClH.H3N/h1H;1H3 | StdInChIKey_Ref = {{stdinchicite|correct|chemspider}} | StdInChIKey = NLXLAEXVIDQMFP-UHFFFAOYSA-N | CASNo = 12125-02-9 | CASNo_Ref = {{cascite|correct|CAS}} | PubChem = 25517 | ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}} | ChemSpiderID=23807 | RTECS = BP4550000 | EINECS = 235-186-4 }} |Section2={{Chembox Properties | N=1 | H=4 | Cl=1 | Appearance = White solid, [[hygroscopic]] | Odor = Odorless | Density = 1.519 g/cm<sup>3</sup><ref name=b92>{{RubberBible92nd|page=4.46}}</ref> | MeltingPtC = 338 | MeltingPt_notes = decomposes, sublimes<ref name=b92/> | SublimationConditions = Sublimes at 337.6&nbsp;°C<ref name=chemister /><br> Δ<sub>subl</sub>''H''<sup><s>o</s></sup> = 176.1 kJ/mol | BoilingPtC = 520 | Solubility = 244 g/L (−15 °C)<br> 294 g/L (0 °C)<br> 383.0 g/L (25 °C)<br> 454.4 g/L (40 °C)<br> 740.8 g/L (100 °C)<ref name=sioc>{{cite book|last1 = Seidell|first1 = Atherton|last2 = Linke|first2 = William F.|year = 1919|title = Solubilities of Inorganic and Organic Compounds|url = https://archive.org/details/solubilitiesino01seidgoog|publisher = D. Van Nostrand Company|edition = 2nd}}<br> Results here are multiplied by water's density at temperature of solution for unit conversion.</ref> | Solubility1 = 32 g/kg (17 °C)<br> 33.5 g/kg (19 °C)<br> 35.4 g/k