Potassium bisulfate

Potassium bisulfate
Names
	IUPAC name Potassium hydrogen sulfate
	Other names Potassium acid sulfate
Identifiers
CAS Number	7646-93-7 ;
3D model (JSmol)	Interactive image;
ChemSpider	56396 ;
ECHA InfoCard	100.028.722
EC Number	231-594-1;
E number	E515(ii) (acidity regulators, ...)
PubChem CID	516920;
RTECS number	TS7200000;
UNII	1J1K03241F ;
UN number	2509
CompTox Dashboard (EPA)	DTXSID8047715 ;
	InChI InChI=1S/K.H2O4S/c;1-5(2,3)4/h;(H2,1,2,3,4)/q+1;/p-1 Key: CHKVPAROMQMJNQ-UHFFFAOYSA-M ; InChI=1/K.H2O4S/c;1-5(2,3)4/h;(H2,1,2,3,4)/q+1;/p-1 Key: CHKVPAROMQMJNQ-REWHXWOFAH;
	SMILES OS(=O)(=O)[O-].[K+];
Properties
Chemical formula	KHSO4
Molar mass	136.169 g/mol
Appearance	colorless solid
Odor	odorless
Density	2.245 g/cm3
Melting point	197 °C (387 °F; 470 K)
Boiling point	300 °C (572 °F; 573 K) (decomposes to form potassium pyrosulfate and water)
Solubility in water	36.6 g/100 mL (0 °C) ; 49 g/100 mL (20 °C) ; 121.6 g/100 mL (100 °C)
Solubility	soluble in acetone, insoluble in ethanol.
Magnetic susceptibility (χ)	−49.8·10−6 cm3/mol
Thermochemistry
Std enthalpy of; formation (ΔfH⦵298)	−1163.3 kJ/mol
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H314, H335
Precautionary statements	P260, P261, P264, P271, P280, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P310, P312, P321, P363, P403+P233, P405, P501
	Lethal dose or concentration (LD, LC):
LD50 (median dose)	2340 mg*kg−1
Safety data sheet (SDS)	External MSDS
Related compounds
Related compounds	Potassium sulfate; Sodium bisulfate
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Potassium bisulfate (potassium bisulphate) is an inorganic compound with the chemical formula KHSO₄ and is the potassium acid salt of sulfuric acid. It is a white, water-soluble solid.