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% |
Conditions | Yield |
---|---|
A <1 B 65.2% | |
A <1 B 65.2% |
difluoro-nitro-methane
potassium tert-butylate
B
potassium nitrite
C
Diethyl carbonate
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% |
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% |
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
potassium ethoxide
B
potassium nitrite
C
Diethyl carbonate
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% |
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; |
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 |
Conditions | Yield |
---|---|
heating in iron crucible to glow; | |
heating in iron crucible to glow; |
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.; |
Conditions | Yield |
---|---|
heating;; | |
heating;; |
Conditions | Yield |
---|---|
In melt byproducts: K2SO4, K2SO3; in melt at 330°C; |
nitrogen(II) oxide
potassium
A
potassium nitrite
B
nitrogen
Conditions | Yield |
---|---|
ignition; | |
In not given ignition of heated K in NO, formation of KNO2, KNO3;; |
potassium
dinitrogen monoxide
A
potassium nitrite
B
nitrogen
Conditions | Yield |
---|---|
In not given formation of KNO2 by a long (enough) reactn.time; appearance of NO (forming by thermical decompn. of N2O);; |
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.; |
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
potassium nitrite
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; |
Conditions | Yield |
---|---|
vac.; | |
melted with much Fe filings to moderate glow; | |
vac.; | |
melted with much Fe filings to moderate glow; |
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;; |
Conditions | Yield |
---|---|
In water Kinetics; reaction of aq. solns. of starting materials at room temp.; IR-spectroscopy; |
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; |
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; |
Conditions | Yield |
---|---|
at 320°C; | |
at 320°C; |
Conditions | Yield |
---|---|
With water | |
With H2O |
Conditions | Yield |
---|---|
heating in vacuum;; | |
heating in vacuum;; |
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; |
Conditions | Yield |
---|---|
With K2SO4 In water Kinetics; Electrolysis; at -2.9 V versus Ag/AgCl at amb. temp.; |
potassium nitrite
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
nitrogen(II) oxide
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
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% |
Conditions | Yield |
---|---|
In water cooling down to 0°C, shaking; recrystn.; | 97% |
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% |
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% |
potassium nitrite
[ruthenium(II)(chloride)(η6-p-cymene)(2,2’-bipyridine)][hexafluorophosphate]
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
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% |
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
ruthenium(III)chloride
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
potassium chloro(pyridine-2,6-dicarboxylato)platinate(II) hydrate
potassium nitro(pyridine-2,6-dicarboxylato)platinate(II) dihydrate
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
[Pt(O2CCF3)(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
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
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
potassium nitrite
copper(II) acetate monohydrate
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
[2-(N,N-dimethylaminomethyl)phenyl]di-n-butyltin(IV) chloride
Conditions | Yield |
---|---|
In tetrahydrofuran; benzene at 30℃; for 48h; Inert atmosphere; Schlenk technique; | 90% |
potassium nitrite
A
nitrogen
B
dinitrogen monoxide
C
trans-hyponitrous acid
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% |
Conditions | Yield |
---|---|
In tetrahydrofuran; benzene at 30℃; for 48h; Inert atmosphere; Schlenk technique; | 88% |
potassium nitrite
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% |
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% |
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
Conditions | Yield |
---|---|
With 18-crown-6 ether In N,N-dimethyl-formamide at 20℃; for 2h; Inert atmosphere; Schlenk technique; | 85% |
potassium nitrite
Conditions | Yield |
---|---|
With ferrocenium hexafluorophosphate In tetrahydrofuran at 0℃; Schlenk technique; | A 85% B n/a |
potassium nitrite
chloronitro(bipyridyl)(N,N'-dinitroso-1,2-ethanediaminato)platinum(II) hemihydrate
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
tris<2-(1-methylimidazolyl)>methoxymethane
bis(nitrito-O,O')[tris[2-(1-methyl)imidazolyl]methoxymethane]copper(II)
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% |
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
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
[Ni(pentachlorophenyl)(pyridine)3]ClO4
Conditions | Yield |
---|---|
In acetone excess KNO2, stirring (6 h, pptn.); filtration, washing (water), recrystn. (CH2Cl2/MeOH); elem. anal.; | 80% |
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% |
Conditions | Yield |
---|---|
Stage #1: dihydrogen hexachloroplatinate tetrahydrate; sodium nitrite In water for 2h; Stage #2: potassium nitrite | 80% |
Molecular Structure of Potassium nitrite (1:1) (CAS NO.7758-09-0):
IUPAC Name: Potassium nitrite
Canonical SMILES: N(=O)[O-].[K+]
InChI: InChI=1S/K.HNO2/c;2-1-3/h;(H,2,3)/q+1;/p-1
InChIKey: BXNHTSHTPBPRFX-UHFFFAOYSA-M
Molecular Weight: 85.1038 [g/mol]
Molecular Formula: KNO2
H-Bond Donor: 0
H-Bond Acceptor: 3
EINECS: 231-832-4
Appearance: white to yellow crystals
Melting Point: 350 °C (dec.)(lit.)
density: 1,92 g/cm3
Sensitive: Hygroscopic
Stability: Stability Stable, but strong oxidizer - contact with combustible material may lead to fire. Incompatible with strong reducing agents, strong acids, combustible materials, cyanides, ammonium salts.
Classification Code: Drug / Therapeutic Agent; Human Data; Mutation data; Reproductive Effect
Potassium nitrite (1:1) (CAS NO.7758-09-0) is used for reducing agent, food chromogenic reagent and chemical agent in organic synthesis. And it also can be used for manufacturing aniline dyes and azo dyes and separating cunico in metallurgy.
Organism | Test Type | Route | Reported Dose (Normalized Dose) | Effect | Source |
---|---|---|---|---|---|
human | TDLo | oral | 1428ug/kg (1.428mg/kg) | SENSE ORGANS AND SPECIAL SENSES: TINNITUS: EAR CARDIAC: PULSE RATE INCREASE WITHOUT FALL IN BP VASCULAR: BP LOWERING NOT CHARACTERIZED IN AUTONOMIC SECTION | Gigiena i Sanitariya. For English translation, see HYSAAV. Vol. 48(1), Pg. 62, 1983. |
mouse | LC50 | inhalation | 85gm/m3/2H (85000mg/m3) | BEHAVIORAL: SLEEP BEHAVIORAL: EXCITEMENT BEHAVIORAL: MUSCLE CONTRACTION OR SPASTICITY) | Gigiena i Sanitariya. For English translation, see HYSAAV. Vol. 48(1), Pg. 62, 1983. |
rabbit | LD50 | oral | 200mg/kg (200mg/kg) | Southwestern Veterinarian. Vol. 27, Pg. 246, 1974. |
Reported in EPA TSCA Inventory.
Safety Information of Potassium nitrite (1:1) (CAS NO.7758-09-0):
Hazard Codes: O, T, N
Risk Statements: 8-25-50
R 8: Contact with combustible material may cause fire
R 25: Toxic if swallowed.
R 50: Very Toxic to aquatic organisms.
Safety Statements: 45-61
S 45: In case of accident or if you feel unwell, seek medical advice immediately (show label where possible).
S 61: Avoid release to the environment. Refer to special instructions safety data sheet.
RIDADR: UN 1488 5.1/PG 2
WGK Germany: 2
HazardClass: 5.1
PackingGroup: II
DOT Classification: 5.1; Label: Oxidizer
Potassium nitrite (1:1) (CAS NO.7758-09-0), its Synonyms are Nitrous acid, potassium salt ; Nitrous acid, potassium salt (1:1) ; Potassium nitrite .
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