7758-09-0

Basic information

• Product Name: Potassium nitrite(III)
• Synonyms: Nitrousacid, potassium salt (8CI,9CI);E 249;Klear;Nitrous acid, potassiumsalt (1:1);Potassium nitrite (1:1)
• CAS NO: 7758-09-0
• Molecular Formula: KNO2
• Molecular Weight: 85.11
• EINECS: 231-832-4
• Mol File: 7758-09-0.mol
• Article Data: 11

Chemical Properties

• Appearance: white to yellow crystals
• Density: 1,92 g/cm³
• CAS DataBase Reference: Potassium nitrite(III)(CAS DataBase Reference)
• NIST Chemistry Reference: Potassium nitrite(III)(7758-09-0)
• EPA Substance Registry System: Potassium nitrite(III)(7758-09-0)

Safety Data

• Hazardous Substances Data: 7758-09-0(Hazardous Substances Data)

Usage

General Description

Potassium nitrite(III) is a chemical compound with the formula KNO2. It is a white, crystalline solid that is commonly used in the production of fireworks, as an oxidizing agent in some chemical reactions, and in the preservation of meats. It is also used in the manufacturing of dyes, pharmaceuticals, and as a food preservative. Potassium nitrite(III) is a strong oxidizing agent and can react violently with organic materials, so it must be handled with care. It is soluble in water and forms an alkaline solution, and its primary hazard is its potential to cause methemoglobinemia, a condition in which the blood is unable to carry oxygen effectively. Therefore, it is important to avoid ingestion or inhalation of potassium nitrite(III) and to handle it in a well-ventilated area with appropriate protective equipment.

InChI:InChI=1/K.HNO2/c;2-1-3/h;(H,2,3)/q+1;/p-1

Synthetic route

potassium chloride + sodium nitrite (7632-00-0) → potassium nitrite (7758-09-0)

Conditions	Yield
In water 88-97 % KNO2 content after evapn. to dryness and recrystn.; NaCl removed by pptn. by AgNO2 or AgNO3;	91%
In water 88-97 % KNO2 content after evapn. to dryness and recrystn.; NaCl removed by pptn. by AgNO2 or AgNO3;	91%

potassium cyanide + silver (7440-22-4) → potassium nitrite (7758-09-0) + potassium nitrate

Conditions	Yield
	A <1 B 65.2%
	A <1 B 65.2%

difluoro-nitro-methane (1493-05-6) + potassium tert-butylate (865-47-4) → potassium fluoride + potassium nitrite (7758-09-0) + Diethyl carbonate (105-58-8)

Conditions	Yield
In tetrahydrofuran byproducts: NO3(1-); alkoxide soln. addn. to F2C(NO2)2 soln. (molar ratio F2C(NO2)2:nucleophile=1:2), reacting (-10°C for 10-15 min), stirring (0°C for 1 h, further at 20°C for 2 h); salts. ppt. sepn. (CH2Cl2 addn.) after 1 d; chem. and GLC anal.;	A 43% B n/a C 11%

difluoro-nitro-methane (1493-05-6) + potassium tert-butylate (865-47-4) → potassium fluoride + potassium nitrite (7758-09-0)

Conditions	Yield
In N,N-dimethyl-formamide alkoxide soln. addn. to F2C(NO2)2 soln. (molar ratio F2C(NO2)2:nucleophile=1:2), reacting (-10°C for 10-15 min), stirring (-50°C,then at 0°C for 2 d); salts. ppt. sepn. (CH2Cl2 addn.); chem. and GLC anal.;	A 19% B 25%

potassium cyanide → potassium nitrite (7758-09-0) + potassium nitrate

Conditions	Yield
With clay; soda lime; oxygen 370°C;with air;	A 2.6% B 23.2%
With O2; soda lime; clay 370°C;with air;	A 2.6% B 23.2%

difluoro-nitro-methane (1493-05-6) + potassium ethoxide (917-58-8) → potassium fluoride + potassium nitrite (7758-09-0) + Diethyl carbonate (105-58-8)

Conditions	Yield
In ethanol; dichloromethane alkoxide soln. (EtOH) addn. to F2C(NO2)2 soln. (CH2Cl2) (molar ratio F2C(NO2)2:nucleophile=1:1), reacting (-10°C for 10-15 min), stirring (0°C for 1 h); salts. ppt. sepn. (CH2Cl2 addn.); chem. and GLC anal.;	A n/a B n/a C 8%

potassium carbonate (584-08-7) → potassium nitrite (7758-09-0)

Conditions	Yield
With nitrous gas In water excluding air; nitrous gas, obtained by redn. of HNO3 by As2O3 or starch, introduced in concd. soln. until complete neutralization; NO in small excess compared to NO2;
In water double reaction of Ba-, Ag- or K-Pb-nitrite with K2CO3; soln. concd. in vacuo, dried in H2 at ambient temp. then at 100 °C;
In water double reaction of Ba-, Ag- or K-Pb-nitrite with K2CO3; soln. concd. in vacuo, dried in H2 at ambient temp. then at 100 °C;
With nitrous gas In water excluding air; nitrous gas, obtained by redn. of HNO3 by As2O3 or starch, introduced in concd. soln. until complete neutralization; NO in small excess compared to NO2;

potassium carbonate (584-08-7) + sodium nitrite (7632-00-0) → potassium nitrite (7758-09-0)

Conditions	Yield
In water for prepn. of large quantities; KNO2 content 85-99.8 %;	>=72
In water for prepn. of large quantities; KNO2 content 85-99.8 %;	>=72

barium sulfide + potassium nitrate → potassium nitrite (7758-09-0)

Conditions	Yield
heating in iron crucible to glow;
heating in iron crucible to glow;

silver(I) nitrite (7783-99-5) + potassium chloride → potassium nitrite (7758-09-0)

Conditions	Yield
In water pure KNO2 if AgNO2 was prepd. from NaNO2 purified by recrystn.;
In water pure KNO2 if AgNO2 was prepd. from NaNO2 purified by recrystn.;

lead(II) oxide + potassium nitrate → potassium nitrite (7758-09-0) + lead(II,IV) oxide

Conditions	Yield
heating;;
heating;;

potassium sulfide + sulfur dioxide (7446-09-5) + potassium nitrate → potassium nitrite (7758-09-0)

Conditions	Yield
In melt byproducts: K2SO4, K2SO3; in melt at 330°C;

nitrogen(II) oxide (10102-43-9) + potassium (7440-09-7) → potassium nitrite (7758-09-0) + nitrogen (7727-37-9)

nitrogen(II) oxide (10102-43-9) + potassium (7440-09-7) → potassium nitrite (7758-09-0) + potassium nitrate

Conditions	Yield
ignition;
In not given ignition of heated K in NO, formation of KNO2, KNO3;;

potassium (7440-09-7) + dinitrogen monoxide (10024-97-2) → potassium nitrite (7758-09-0) + nitrogen (7727-37-9)

Conditions	Yield
In not given formation of KNO2 by a long (enough) reactn.time; appearance of NO (forming by thermical decompn. of N2O);;

potassium (7440-09-7) + Nitrogen dioxide (10102-44-0) → potassium nitrite (7758-09-0) + potassium nitrate

Conditions	Yield
inflammation of K at room temp.;
In not given ignition of heated K in NO2, formation of KNO2, KNO3;;
inflammation of K at room temp.;

lead (7439-92-1) + potassium nitrate → potassium nitrite (7758-09-0)

Conditions	Yield
1 part of KNO3 melted with 2 part of Pb; boiling the melt with H2O, KNO2 pptd. with alcohol;
1 part of KNO3 melted with 2 part of Pb; boiling the melt with H2O, KNO2 pptd. with alcohol;

copper (12775-96-1, 15158-11-9, 15721-63-8, 16941-75-6, 17493-86-6, 19498-52-3, 20499-83-6, 20499-84-7, 20499-85-8, 20499-86-9, 20573-10-8, 20573-11-9, 21595-51-7, 21595-52-8, 22206-52-6, 26445-28-3, 28959-95-7, 37362-93-9, 39417-05-5, 54603-16-6, 54603-23-5, 54603-32-6, 54603-40-6, 54603-48-4, 54603-81-5, 54603-89-3, 56316-56-4, 95985-91-4, 122297-32-9, 7440-50-8) + potassium nitrate → potassium nitrite (7758-09-0)

Conditions	Yield
melted with finely powd. Cu;
With KOH more easily if Cu is of electrolytic quality;
melted with finely powd. Cu;
With potassium hydroxide more easily if Cu is of electrolytic quality;

iron (7439-89-6) + potassium nitrate → potassium nitrite (7758-09-0)

Conditions	Yield
vac.;
melted with much Fe filings to moderate glow;
vac.;
melted with much Fe filings to moderate glow;

hydrogen + potassium nitrate → potassium nitrite (7758-09-0) + ammonia (7664-41-7)

Conditions	Yield
In water redn. of KNO3 in aq. soln. at normal temp. by Pd black, laden with H;;
In water redn. of KNO3 in aq. soln. at normal temp. by Pd black, laden with H;;

indium (7440-74-6) + potassium nitrate → potassium nitrite (7758-09-0) + indium(1+)

Conditions	Yield
In water Kinetics; reaction of aq. solns. of starting materials at room temp.; IR-spectroscopy;

potassium nitrate + zinc (7440-66-6) → potassium nitrite (7758-09-0)

Conditions	Yield
With ammonia In water added NH3 to aq. soln. of KNO3 satd. at 30-40 °C then Zn under cooling; filtered, Zn pptd. by CO2, neutralized; KNO3 crystallizes first;
With NH3 In water react. rate and yield increased by excess of NH3 and by holding temp. 20-25 °C;
With NH3 In water added NH3 to aq. soln. of KNO3 satd. at 30-40 °C then Zn under cooling; filtered, Zn pptd. by CO2, neutralized; KNO3 crystallizes first;
With ammonia In water react. rate and yield increased by excess of NH3 and by holding temp. 20-25 °C;

n-Amyl nitrite (463-04-7) + potassium hydroxide → potassium nitrite (7758-09-0)

Conditions	Yield
In ethanol CP KNO2 with KOH (dissolved in alcohol) not in excess;
In ethanol CP KNO2 with KOH (dissolved in alcohol) not in excess;

2K(1+)*Pb(2+)*3NO2(1-)*NO3(1-)=K2Pb(NO2)3NO3 → potassium nitrite (7758-09-0) + nitrogen(II) oxide (10102-43-9) + lead(II) oxide + Nitrogen dioxide (10102-44-0) + potassium nitrate

Conditions	Yield
at 320°C;
at 320°C;

K(1+)*CN(1-)*K(1+)*NO2(1-)*0.5H2O=KCN*KNO2*0.5H2O → potassium cyanide + potassium nitrite (7758-09-0)

Conditions	Yield
With water
With H2O

6K(1+)*2{Co(NO2)6}(3-)*3H2O → cobalt(III) oxide + potassium nitrite (7758-09-0) + water (7732-18-5) + nitrogen(II) oxide (10102-43-9) + potassium nitrate

Conditions	Yield
heating in vacuum;;
heating in vacuum;;

potassium nitrate → potassium nitrite (7758-09-0) + potassium peroxide + potassium (7440-09-7) + Nitrogen dioxide (10102-44-0)

Conditions	Yield
byproducts: O2; Electrolysis; graphite electrodes; the graphite electrode is dissolved by the formed peroxide and K2CO3 and K2O are formed; with metal electrode is the yield of KNO2 lower;
byproducts: O2; Electrolysis; aluminium or graphite cathode; the graphite electrode is dissolved by the formed peroxide and K2CO3 and K2O are formed;

potassium nitrate → potassium nitrite (7758-09-0) + nitrogen (7727-37-9) + ammonia (7664-41-7)

Conditions	Yield
With K2SO4 In water Kinetics; Electrolysis; at -2.9 V versus Ag/AgCl at amb. temp.;

potassium nitrate → potassium nitrite (7758-09-0) + oxygen

potassium nitrate → potassium nitrite (7758-09-0)

Conditions	Yield
hydrated tin dioxide In water Irradiation (UV/VIS); redn. of KNO3 to KNO2 in aq. soln. by sunlight in presence of colloid tin(IV) oxide hydrate;;
byproducts: O2; dissocn. pressures are given at various temp.;
byproducts: O2; strong heating;

potassium nitrite (7758-09-0) → nitrogen(II) oxide (10102-43-9)

Conditions	Yield
With sulfuric acid; water at 20℃; under 375.038 Torr; for 2.22222E-05h; Pressure; Reagent/catalyst; Temperature; Time;	99.98%
With sulfuric acid; potassium iodide In not given byproducts: H2O, I2; washing with NaOH soln.;
above 500 °C, based on spect. results;

potassium nitrite (7758-09-0) + {Au(H2NCH2CH(NH2)CH3)2}(3+)*3ClO4(1-)*H2O={Au(H2NCH2CH(NH2)CH3)2}(ClO4)3*H2O → {Au(H2NCH2CH(CH3)NNO)(H2NCH2CH(CH3)NH2)}(2+)*2ClO4(1-)*H2O={Au(H2NCH2CH(CH3)NNO)(H2NCH2CH(CH3)NH2)}(ClO4)2*H2O

Conditions	Yield
With HClO4 In water byproducts: KClO4; addn. of soln. of KNO2 to soln. of complex over 10 min, addn. of 1 M HClO4 up to pH 3; filtering after 3 d, evapn. in vac. until pptn. of KClO4, addn. of EtOH, filtration, concg., addn. of dioxane, filtration, addn. of dioxane and EtOH, addn. of ether with stirring, filtering ppt., washing with ether, drying in vac. over P2O5; elem. anal.;	97%

potassium nitrite (7758-09-0) + sulfur dioxide (7446-09-5) + potassium hydrogencarbonate (298-14-6) → dipotassium hydroxylamine-N,N'-disulfonate dihydrate

Conditions	Yield
In water cooling down to 0°C, shaking; recrystn.;	97%

potassium nitrite (7758-09-0) + cobalt(II) nitrate → potassium hexakis(nitrito)cobaltate(III)

Conditions	Yield
With CH3COOH In water byproducts: CH3COOK, NO, H2O; Co(NO3)2 and KNO2 (1:7) combined; acetic acid added (Co(NO3)2:CH3COOH=1:2) at 70+/-5°C under stirring; mixt. stirred at a rate of 500+/-50 rpm for 30 min; ppt. allowed to settle for 15-16 h; crystals washed (H2O) until pH about 4.5; solid filtered; dried at 90+/-%°C for 32 h; elem. anal.;	97%

potassium nitrite (7758-09-0) + chlorine (7782-50-5) + palladium (7440-05-3) → potassium tetranitropalladate (II)

Conditions	Yield
In water suspn. of Pd powder in distd. water was treated with Cl2 until all Pd dissolved, purged with N2, filtered, KNO2 was added; crystd. at 278 K; elem. anal.;	95%

ammonium hexafluorophosphate + potassium nitrite (7758-09-0) + [ruthenium(II)(chloride)(η6-p-cymene)(2,2’-bipyridine)][hexafluorophosphate] (159310-08-4) + silver nitrate → [(η6-p-cymene)Ru(2,2'-bipyridine)NO2]PF6

Conditions	Yield
In methanol byproducts: AgCl; under inert atm. to Ru complex and AgNO3 in MeOH KNO2 was added and stirred for 18 h; excess NH4PF6 was added and cooled in ice bath, ppt. was filtered and stirred in acetone for 10 min, soln. was filtered and concd. in vacuo, Et2O was added, ppt. was filtered and washed with Et2O; elem. anal.;	93.1%

potassium nitrite (7758-09-0) + Pt(4+)*NH2(CH2)2NH(CH2)2NH2*3Cl(1-)*NO2(1-)={Pt(NH2(CH2)2NH(CH2)2NH2)ClNO2Cl}Cl → Pt(4+)*NH2(CH2)2NH(CH2)2NH2*2Cl(1-)*2NO2(1-)={Pt(NH2(CH2)2NH(CH2)2NH2)ClNO2Cl}NO2

Conditions	Yield
In water addn. of KNO2 in H2O to a soln. of Pt-complex in H2O (molar ratio complex:KNO2=1:5), pptn. after 1-2 min, cooled in an ice bath; filtered, washed (several drops of icy water, EtOH and ether); elem. anal.;	93%

potassium nitrite (7758-09-0) + {C5H5Ni(P(C4H9-n)3)2}Cl → {C5H5Ni(P(C4H9-n)3)2}NO2

Conditions	Yield
In water anion exchange in aq. soln.; molar ratio (C5H5Ni(P(C4H9-n)3)2)(1+)Cl(1-):KNO2 = 1:3; between O°C and room temp.; product dissolved in benzene; recrystn. from hexane or benzene/hexane in the presence of P(C4H9-n)3;	91%
In water

potassium nitrite (7758-09-0) + ruthenium(III)chloride (10049-08-8) → potassium sodium hexanitroruthenate(II)*H2O

Conditions	Yield
With Na(1+); Cl2 In hydrogenchloride heating on a water bath for 30 min; filtn. and dissolving in a minimum of water; elem. anal.;	90%

potassium nitrite (7758-09-0) + potassium chloro(pyridine-2,6-dicarboxylato)platinate(II) hydrate (117581-24-5) + silver nitrate → potassium nitro(pyridine-2,6-dicarboxylato)platinate(II) dihydrate (119695-31-7)

Conditions	Yield
In water byproducts: AgCl; soln. of KNO2 added slowly to the soln. of Pt-complex (70°C), stirring (1 h); addn. of AgNO3, AgCl filtered off, soln. cooled slowly to room temp.; crystals filtered off and dried (vac.); elem. anal.;	90%

potassium nitrite (7758-09-0) + [Pt(O2CCF3)(C6Cl5)(P(C6H5)3)2] (84330-57-4, 112711-85-0) → Pt(2+)*NO2(1-)*C6Cl5(1-)*2P(C6H5)3=[Pt(NO2)(C6Cl5)(P(C6H5)3)2]

Conditions	Yield
In acetone slight excess of KNO2 added to soln. of Pt complex in acetone, left at room temp. for 4 h; concd. in vac., recrystd. from CH2Cl2/MeOH; elem. anal.;	90%

potassium nitrite (7758-09-0) + 2K(1+)*[Pt(H2NC2H4SO3)2Cl2](2-)*2H2O=K2[Pt(H2NC2H4SO3)2Cl2]*2H2O → 2K(1+)*[Pt(H2NC2H4SO3)2(NO2)2](2-)=K2[Pt(H2NC2H4SO3)2(NO2)2]

Conditions	Yield
In water addn. of a satd. soln. of KNO2 to that of the Pt-compd. (ratio 2 : 1, 80°C, 30 min); ppt. filtered off, washed (H2O) and dried (over P2O5); elem. anal.;	90%

potassium nitrite (7758-09-0) + 2K(1+)*Pt(NH2CH2CH2SO3)2Cl2(2-)*5H2O=K2(Pt(NH2CH2CH2SO3)2Cl2)*5H2O → 2K(1+)*[Pt(H2NC2H4SO3)2(NO2)2](2-)=K2[Pt(H2NC2H4SO3)2(NO2)2]

Conditions	Yield
In water byproducts: KCl; satd. solns. (1 : 2), 80°C (30 min); ppt. filtered off, washed (H2O) and dried (over P2O5); elem. anal.;	90%
In water addn. of a satd. soln. of KNO2 to that of the Pt-compd. (ratio 2 : 1, 80°C, 30 min); ppt. filtered off, washed (H2O) and dried (over P2O5); elem. anal.;	90%

di(pyridin-2-yl)amine (1202-34-2) + potassium nitrite (7758-09-0) + copper(II) acetate monohydrate (6046-93-1) → [Cu(di-2-pyridylamine)2(ONO)]NO2

Conditions	Yield
In methanol; water aq. soln. of Cu salt added to soln. of org. compd. in MeOH, then added aq. soln. of KNO2; allowed to stand for 1 wk, filtered, washed with mother liquor, air-dried; elem. anal.;	90%

potassium nitrite (7758-09-0) + [2-(N,N-dimethylaminomethyl)phenyl]di-n-butyltin(IV) chloride (215306-19-7) → C17H30N2O2Sn

Conditions	Yield
In tetrahydrofuran; benzene at 30℃; for 48h; Inert atmosphere; Schlenk technique;	90%

potassium nitrite (7758-09-0) + hydrazin sulfate → nitrogen (7727-37-9) + dinitrogen monoxide (10024-97-2) + trans-hyponitrous acid (19467-31-3, 173728-04-6)

Conditions	Yield
In not given at room temp. or upon boiling from equimolar amounts in 3% solns.; no formation of H2N2O2 even in concd. solns. at low temps.; mole ratio of N2O:N2 depends on the mole ratio nitrite:hydrazonium salt;;	A 11% B 89% C 0%

potassium nitrite (7758-09-0) + (2-(N,N-dimethylaminomethyl)phenyl)(n-Bu)SnCl2 (215306-21-1) → C13H21N3O4Sn

Conditions	Yield
In tetrahydrofuran; benzene at 30℃; for 48h; Inert atmosphere; Schlenk technique;	88%

potassium nitrite (7758-09-0) + dichloro(pentamethylcyclopentadienyl)rhodium (III) dimer → K[Rh(pentamethylcyclopentadienyl)(NO2)3]

Conditions	Yield
In acetone N2-atmosphere; refluxing of excess NaNO2 with Rh-complex (15 h); filtration, washing (acetone), solvent removal from filtrate (vac.), crystn. (CH2Cl2/hexane); elem. anal.;	86%

potassium nitrite (7758-09-0) → hydroxylamine hydrochloride (5470-11-1)

Conditions	Yield
With hydrogenchloride; sulfur dioxide In water byproducts: H2SO4; react. in water contg. ice and K-acetate leading SO2 into it,mixing,at 0°C;filtering,washing with 0.5 n HCl,hydrolysis at 100°C,for 2h; pptg. of H2SO4 with BaCl2,filtering,evapn.;	85%

potassium dodecahydro-closo-dodecaborate + potassium nitrite (7758-09-0) + tetrabutyl-ammonium chloride (1112-67-0) → 2(C4H9)4N(1+)*B12H11NO(2-)=((C4H9)4N)2B12H11NO + 4(C4H9)4N(1+)*[B12H11N(O)]2(4-)=((C4H9)4N)4[B12H11N(O)]2

Conditions

Yield

With hydrogenchloride In hydrogenchloride; water byproducts: KCl, H2O; KNO2 in H2O was added dropwise to aq. HCl (37.8%) soln. of B-compd. at 0°C (temp. was not allowed to rise above 5-7 °C, mixt. was kept at 0. degree.C for 1 h and at room temp. until soln. was not conta ined NO2(1-)-ion; concn. (vac., 30 °C), EtOH was added, filtn. and evapn. in vac. at 30 °C, drying at room temp. in high-vac. for 1 h, MeCN was added, chromy. (silica, MeCN-CHCl3=1:1) (2 fraction), evapn., H2O was added,Bu4NCl was added in H2O, elem. anal.;

A 85% B 24%

potassium nitrite (7758-09-0) + [Fe((1E,1'E)-N,N'-(propane-1,3-diyl)bis(1-(1-methyl-1H-imidazol-2-yl)methanimine))(MeCN)2](BF4)2 → [Fe((1E,1'E)-N,N'-(propane-1,3-diyl)bis(1-(1-methyl-1H-imidazol-2-yl)methanimine))(NO2)2]

Conditions	Yield
With 18-crown-6 ether In N,N-dimethyl-formamide at 20℃; for 2h; Inert atmosphere; Schlenk technique;	85%

potassium nitrite (7758-09-0) + [Fe(NO)2(μ-1,3-bis(dimethylamino)-2-propanolate)Fe-(NO)2(THF)] → [Fe2(NO)4(μ-1,3-bis(dimethylamino)-2-propanolate)(μ-NO2)] + [Fe2(NO)4(μ-1,3-bis(dimethylamino)-2-propanolate)(μ-NO2)]

Conditions	Yield
With ferrocenium hexafluorophosphate In tetrahydrofuran at 0℃; Schlenk technique;	A 85% B n/a

potassium nitrite (7758-09-0) + {Pt(endpy)Cl2}Cl2*5H2O → chloronitro(bipyridyl)(N,N'-dinitroso-1,2-ethanediaminato)platinum(II) hemihydrate (85116-30-9)

Conditions	Yield
In water soln. of KNO2 in boiling water added to a soln. of the Pt-complex in boiling water, kept on a steam bath for 3 h; cooled to room temp., pptn. filtered off, washed with hot water, EtOH, and then ether, dissolved in boiling DMF, recrystd. by cooling, evapd., elem. anal.;	84%

potassium nitrite (7758-09-0) + copper(II) nitrate trihydrate + tris<2-(1-methylimidazolyl)>methoxymethane (101420-28-4) → bis(nitrito-O,O')[tris[2-(1-methyl)imidazolyl]methoxymethane]copper(II) (178316-11-5)

Conditions	Yield
In acetone addn. of 1 equiv. ligand and 2 equiv. KNO2 to Cu-salt, stirring for 30 min; filtration, crystn. on evapn., collection (filtration), drying in air;	82%

potassium nitrite (7758-09-0) + hydroxyammonium sulfate → nitrogen (7727-37-9) + dinitrogen monoxide (10024-97-2)

Conditions	Yield
In not given in acidic soln. from equimolar amounts of components; mole ratio N2O : N2 depends on the mole ratio of nitrite : hydrazonium salt;;	A 20% B 80%
In not given in acidic soln.; mole ratio N2O : N2 = 2:1 at mole ratio of nitrite : hydrazonium salt = 2:1;;

potassium nitrite (7758-09-0) + [Ru(CH3CN)2(CO)2(P(C6H5)3)2](2+)*2(PF6)(1-)=[Ru(CH3CN)2(CO)2(P(C6H5)3)2](PF6)2 → Ru(2+)*2NO2(1-)*2(CO)*2P(C6H5)3=[Ru(NO2)2(CO)2(P(C6H5)3)2]

Conditions	Yield
In methanol under N2 addn. of MeOH and KNO2 to complex, 50-60°C, 4 h, pptn.,evapn. in vac.; extn. with CH2Cl2, filtration, addn. of MeOH to ext., concn. in vac., recrystn. from CH2Cl2/MeOH, not sepn., detectation by IR, 31P NMR;	80%

potassium nitrite (7758-09-0) + [Ni(pentachlorophenyl)(pyridine)3]ClO4 (78331-77-8) → [Ni(NO2)(pentachlorophenyl)(pyridine)2]

Conditions	Yield
In acetone excess KNO2, stirring (6 h, pptn.); filtration, washing (water), recrystn. (CH2Cl2/MeOH); elem. anal.;	80%

N,N,N,N,N,N-hexamethylphosphoric triamide (680-31-9) + potassium nitrite (7758-09-0) + LaCl3*7.1H2O → La(3+)*3(NO2)(1-)*3(OP(N(CH3)2)3)= [La(NO2)3(OP(N(CH3)2)3)3]

Conditions

Yield

With triethyl formate In ethanol byproducts: KCl; LaCl3*7.1H2O in ethanol dehydrated by boiling with triethyl formate in presence OP(NMe2)3 for 15 min; filtering beaker with KNO2 mounted on backflow condenser, mixt. refluxed to complete dissoln. of KNO3; KCl filtered off; solvents distd. off in vac. at 300°K; filtered(acetone soln.), acetone distd. off in vac., crystd. after treatment with OP(NMe2)3 three times; washed (anhydrous diethyl ether), dried in vac.; elem. anal., XRD;

80%

potassium nitrite (7758-09-0) + dihydrogen hexachloroplatinate tetrahydrate + sodium nitrite (7632-00-0) → potassium tetranitroplatinate(IV)

Conditions	Yield
Stage #1: dihydrogen hexachloroplatinate tetrahydrate; sodium nitrite In water for 2h; Stage #2: potassium nitrite	80%

Upstream product

• 1493-05-6 difluoro-nitro-methane 
• 865-47-4 potassium tert-butylate 
• 10102-43-9 nitrogen(II) oxide 
• 7440-09-7 potassium 
• 10024-97-2 dinitrogen monoxide 
• 10102-44-0 Nitrogen dioxide 
• 7757-79-1 potassium nitrate 

Downstream Products

• 15421-15-5 potassium ascorbate 
• 1333-74-0 hydrogen 
• 10102-44-0 Nitrogen dioxide 
• 7732-18-5 water 
• 10102-43-9 nitrogen(II) oxide 
• 2696-92-6 nitrosylchloride 
• 75-52-5 nitromethane 
• 624-91-9 methyl nitrite 
• 2386-56-3 potassium mesylate 
• 584-08-7 potassium carbonate 
• 7440-57-5 gold 
• 5470-11-1 hydroxylamine hydrochloride 
• 7803-49-8 hydroxylamine 
• 13823-50-2 potassium sulfamate 

Relevant articles and documents

The thermal behavior of potassium dinitramide. Part 1. Thermal stability

In this paper, thermal analysis, X-ray photoelectric spectroscopy (XPS), etc. were used to investigate the thermal stability of potassium dinitramide (KDN). It was found that the thermal decomposition of KDN crystal conformed to the topochemistry. The dec

Color Centers in UV-Irradiated Nitrates

We show that the peroxonitrite anion, ONOO(1-), is a primary product when solid nitrates are irradiated with 254-nm UV and is the source of the yellow color.Many previous investigators have attempted to interpret photolysis processes in crystalline nitrates as primarily involving nitrite anions and oxygen gas, not realizing that the nitrite and oxygen can be formed by decomposition of peroxonitrite when the solid is dissolved for analysis.A small amount of nitrite is formed in nitrate crystals directly from the nitrate ions but much of it is generated by photolysis of the peroxonitrite anion.

Neutron powder diffraction study of the low-temperature phases of KNO2

We made neutron powder diffraction measurements for phase III (at 4, 120, 180, 220, and 250 K) and phase II (at 280 K) of KNO2. The structure of phase III was determined by the Rietveld method using the data obtained at 4 K; the initial structu

Microemulstion synthesis of powders of water-soluble energy-saturated salts

The feasibility of preparing energy-saturated salts (NH4NO 3, KNO3, and NaBH4) in powders with various particle sizes in microemulsion systems based on oxyethylated surfactant Tergitol NP-4 has been demonstrated. Powders were isolated by destroying microemulsions with acetone. The regions of micellar synthesis have been determined depending on the solubilization capacities and concentrations of the reagents and salts at a fixed Tergitol NP-4 concentration (0.25 mol/L). The morphologies and particle sizes of the thus-prepared salt powders were characterized by scanning electron microscopy (SEM), X-ray powder diffraction, differential scanning calorimetry (DSC), differential thermal analysis (DTA), and thermogravimetry; the hydrodynamic radii of microemulsions were characterized by photon-correlation spectroscopy. Pleiades Publishing, Ltd., 2012.

Palladium and platinum-based catalysts in the catalytic reduction of nitrate in water: Effect of copper, silver, or gold addition

Supported bimetallic palladium and platinum catalysts promoted by metals of group 11 (Cu, Ag, and Au) were prepared by control surface deposition and tested in the liquid-phase reduction of nitrates. Whereas bimetallic catalysts promoted by gold are totally inactive, copper or silver deposition leads to bimetallic catalysts active for nitrate reduction. The promoting effect of the second metal can be related to its redox properties, confirming that nitrate reduction occurs through a bifunctionnal mechanism following (i) a direct redox mechanism between promoter and nitrate and (ii) a catalytic reaction between hydrogen, chemisorbed on the noble metal, and intermediate nitrite. TEM experiments, TPR, and FTIR of chemisorbed CO studies of the different systems have been used to evidence the metal-metal interaction and the localization of the promoter. The characterization results have been correlated with the catalytic behavior of the materials.