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Potassium nitrate

Names IUPAC namePotassium nitrateOther names SaltpeterSaltpetreIndian SaltpetreNitrate of potashNitreIdentifiers CAS Number7757-79-13D model (JSmol)Interactive imageChEMBLChEMBL1644029ChemSpider22843ECHA InfoCard100.028.926EC Number231-818-8E numberE252 (preservatives)KEGGD02051PubChemCID24434RTECS numberTT3700000UNIIRU45X2JN0ZUN number1486 CompTox Dashboard(EPA)DTXSID4029692InChIInChI=1S/K.NO3/c;2-1(3)4/q+1;-1Key: FGIUAXJPYTZDNR-UHFFFAOYSA-NInChI=1/K.NO3/c;2-1(3)4/q+1;-1Key: FGIUAXJPYTZDNR-UHFFFAOYAMSMILES[K+].[O-][N+]([O-])=OProperties Chemical formulaKNO3Molar mass101.102 g·mol Appearance white solid Odorodorless Density2.109 g/cm (16 °C (61 °F; 289 K)) Melting point334 °C (633 °F; 607 K) Boiling point400 °C (752 °F; 673 K) (decomposes) Solubility in water133 g/L (0 °C (32 °F; 273 K))316 g/L (20 °C (68 °F; 293 K))383 g/L (25 °C (77 °F; 298 K))2439 g/L (100 °C (212 °F; 373 K))Solubilityslightly soluble in ethanol soluble in glycerol, ammoniaBasicity (pKb) 15.3 Magnetic susceptibility (χ)−33.7×10 cm/molRefractive index (nD)1.3351.50561.5604Structure Crystal structureOrthorhombic, AragoniteThermochemistry Heat capacity(C)95.06 J⋅mol·KStd enthalpy offormation(ΔfH298)−494.00 kJ⋅molHazards GHS labelling: PictogramsSignal wordWarningHazard statementsH272Precautionary statementsP210, P220, P221, P280, P370+P378, P501NFPA 704 (fire diamond) 112OXFlash pointnon-flammable (oxidizer) Lethal dose or concentration (LD, LC): LD50 (median dose)1901 mg/kg (oral, rabbit)3750 mg/kg (oral, rat)Safety data sheet (SDS) ICSC 0184Related compounds Other anionsPotassium nitriteOther cationsLithium nitrateSodium nitrateCalcium nitrateRubidium nitrateStrontium nitrateSilver nitrateCaesium nitrateBarium nitrateAmmonium nitrateRelated compoundsPotassium chloridePotassium sulfateSupplementary data page Potassium nitrate (data page)Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).Nverify ( ?)

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