Product Name

  • Name

    Sodium nitrite

  • EINECS 231-555-9
  • CAS No. 7632-00-0
  • Article Data189
  • CAS DataBase
  • Density 2.168 g/cm3
  • Solubility 820 g/L (20 °C) in water
  • Melting Point 271 °C(lit.)
  • Formula NaNO2
  • Boiling Point 320 °C
  • Molecular Weight 68.9953
  • Flash Point
  • Transport Information UN 3219 5.1/PG 3
  • Appearance white to off-white powder
  • Safety 45-61-36-26
  • Risk Codes 8-25-50-22-36/38
  • Molecular Structure Molecular Structure of 7632-00-0 (Sodium nitrite)
  • Hazard Symbols OxidizingO, ToxicT, DangerousN, HarmfulXn
  • Synonyms Natrium nitrit;Nitrous acid sodium salt;Dusitan sodny;Anti-Rust;Nitrite de sodium;Diazotizing salts;Erinitrit;NCI-C02084;Filmerine;Synfat 1004;Nitrous acid, sodium salt;M 138C;Sodium Nitrite for Industrial use;Industrial Sodium Nitrite;
  • PSA 52.49000
  • LogP 0.25060

Synthetic route

sodium nitrate
7631-99-4

sodium nitrate

sodium nitrite
7632-00-0

sodium nitrite

difluoro-nitro-methane
1493-05-6

difluoro-nitro-methane

sodium ethanolate
141-52-6

sodium ethanolate

A

sodium fluoride

sodium fluoride

B

sodium nitrite
7632-00-0

sodium nitrite

C

Diethyl carbonate
105-58-8

Diethyl carbonate

Conditions
ConditionsYield
In ethanol; dichloromethane alkoxide soln. (EtOH) addn. to F2C(NO2)2 soln. (CH2Cl2) (molar ratio F2C(NO2)2:nucleophile=1:4), reacting (-10°C for 10-15 min), stirring (0°C for 1 h, then 20°C for 1 h); salts. ppt. sepn. (CH2Cl2 addn.); chem. and GLC anal.;A 81%
B 78%
C 7%
In ethanol; dichloromethane alkoxide soln. (EtOH) addn. to F2C(NO2)2 soln. (CH2Cl2) (molar ratio F2C(NO2)2:nucleophile 1:2, reacting (-10°C for 10-15 min), stirring(0°C for 1 h), reaction mixt. leaving overnight at -20°C; salts. ppt. sepn. (CH2Cl2 addn., cooling), ppt. treatment with boiling ethanol, NaNO2 pptn. from filtrate, aq. H2SO4 addn. to filtrate, org. layer sepn., aq. layer extn. (CH2Cl2), ext. drying (MgSO4), distn. lead to(EtO)2CO; chem. and GLC anal.;A 48%
B 62%
C 12%
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, then 20°C for 1 h); salts. ppt. sepn. (CH2Cl2 addn.); chem. and GLC anal.;A 18%
B 26%
C 9%
In ethanol; N,N-dimethyl-formamide alkoxide soln. (EtOH) addn. to F2C(NO2)2 soln. (DMF) (molar ratio F2C(NO2)2:nucleophile=1:2), reacting (-10°C for 10-15 min), stirring (0°C for 1 h); salts. ppt. sepn. (CH2Cl2 addn.); chem. and GLC anal.;
sodium sulfide

sodium sulfide

calcium(II) nitrate
13477-34-4

calcium(II) nitrate

sodium sulfite
7757-83-7

sodium sulfite

A

calcium sulfate

calcium sulfate

B

sodium sulfate
7757-82-6

sodium sulfate

C

sodium nitrite
7632-00-0

sodium nitrite

Conditions
ConditionsYield
In neat (no solvent) formation at heating under glowing;;A n/a
B n/a
C 60%
difluoro-nitro-methane
1493-05-6

difluoro-nitro-methane

sodium ethanolate
141-52-6

sodium ethanolate

A

carbonate(2-)
3812-32-6

carbonate(2-)

B

sodium fluoride

sodium fluoride

C

sodium nitrite
7632-00-0

sodium nitrite

D

Diethyl carbonate
105-58-8

Diethyl carbonate

Conditions
ConditionsYield
In ethanol 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, then 20°C for 1 h); salts. ppt. sepn. (CH2Cl2 addn.); chem. and GLC anal.;A 8%
B 43%
C n/a
D 14%
fluorotrinitromethane
21824-10-2

fluorotrinitromethane

sodium ethanolate
141-52-6

sodium ethanolate

A

ethoxyfluorodinitromethane
17021-83-9

ethoxyfluorodinitromethane

B

sodium fluoride

sodium fluoride

C

sodium nitrite
7632-00-0

sodium nitrite

D

Diethyl carbonate
105-58-8

Diethyl carbonate

Conditions
ConditionsYield
In ethanol; dichloromethane alkoxide soln. (EtOH) addn. (dropwise) to FC(NO2)3 soln. (CH2Cl2) (molar ratio FC(NO2)3:nucleophile=1:2), stirring (0-5°C for 1.5 h), 5%H2SO4 soln. addn., extn. (CH2Cl2), drying (MgSO4); residue distn. (vac.), ppt. sepn.; chem. and GLC anal., IR spectroscopy;A 42%
B n/a
C n/a
D 6.8%
N,N-bis(methylsulfonyl)hydroxylamine
96088-55-0

N,N-bis(methylsulfonyl)hydroxylamine

A

sodium methansulfinate
20277-69-4

sodium methansulfinate

B

sodium nitrite
7632-00-0

sodium nitrite

Conditions
ConditionsYield
With sodium hydroxide In water Product distribution; Mechanism; hydrolysis with basic, neutral and acidic aqu. solutions, also in addition of NaN3 (other products);
sodium hydroxide
1310-73-2

sodium hydroxide

Nitrogen dioxide
10102-44-0

Nitrogen dioxide

sodium nitrite
7632-00-0

sodium nitrite

sodium peroxide

sodium peroxide

N-oxo-N-nitrosoamine
16824-89-8, 12533-50-5

N-oxo-N-nitrosoamine

sodium nitrite
7632-00-0

sodium nitrite

Conditions
ConditionsYield
In neat (no solvent) at 150°C;;
sodium hyponitrite

sodium hyponitrite

Nitrogen dioxide
10102-44-0

Nitrogen dioxide

A

sodium nitrate
7631-99-4

sodium nitrate

B

sodium nitrite
7632-00-0

sodium nitrite

Conditions
ConditionsYield
oxidation;
oxidation;
sodium azide

sodium azide

oxygen

oxygen

sodium nitrite
7632-00-0

sodium nitrite

Conditions
ConditionsYield
With sodium In neat (no solvent) byproducts: N2; oxydation when heating in presence of Na;;
With Na In neat (no solvent) byproducts: N2; oxydation when heating in presence of Na;;
sodium azide

sodium azide

Nitryl chloride

Nitryl chloride

sodium nitrite
7632-00-0

sodium nitrite

sodium azide

sodium azide

barium peroxide
1304-29-6

barium peroxide

sodium nitrite
7632-00-0

sodium nitrite

Conditions
ConditionsYield
With sodium In neat (no solvent) byproducts: N2; oxydation when heating in presence of Na;;
With Na In neat (no solvent) byproducts: N2; oxydation when heating in presence of Na;;
sodium amide

sodium amide

nitrosylchloride
2696-92-6

nitrosylchloride

sodium nitrite
7632-00-0

sodium nitrite

Conditions
ConditionsYield
In neat (no solvent)
In neat (no solvent)
sodium sulfide

sodium sulfide

sodium nitrate
7631-99-4

sodium nitrate

sulfur dioxide
7446-09-5

sulfur dioxide

sodium nitrite
7632-00-0

sodium nitrite

Conditions
ConditionsYield
In melt byproducts: Na2SO4, Na2SO3; in melt at 330°C;
sodium nitrate
7631-99-4

sodium nitrate

hydrogen cation

hydrogen cation

A

ammonia
7664-41-7

ammonia

B

hydrogen
1333-74-0

hydrogen

C

sodium nitrite
7632-00-0

sodium nitrite

Conditions
ConditionsYield
In water byproducts: H2O; Electrolysis; electrolysis (1.25V vs. SCE), (Bu4N)4(MoFe3S4(SC6H5)3(O2C6Cl4))2 modified glassy carbon electrode, pH 10;
sodium nitrate
7631-99-4

sodium nitrate

nitric acid
7697-37-2

nitric acid

sodium nitrite
7632-00-0

sodium nitrite

Conditions
ConditionsYield
In acetic acid Kinetics; other Radiation; γ-ray radiation of (60)Co; at 23°C; dose rate of 1.2 Gy s**(-1);
ammonium nitrate

ammonium nitrate

sodium
7440-23-5

sodium

A

sodium hyponitrite

sodium hyponitrite

B

disodium nitrite

disodium nitrite

C

sodium hydroxide
1310-73-2

sodium hydroxide

D

sodium nitrite
7632-00-0

sodium nitrite

Conditions
ConditionsYield
In ammonia
In ammonia NH3 (liquid);
Iron(III) nitrate nonahydrate

Iron(III) nitrate nonahydrate

sodium
7440-23-5

sodium

A

hydrogen
1333-74-0

hydrogen

B

iron
7439-89-6

iron

C

sodium amide

sodium amide

D

sodium hydroxide
1310-73-2

sodium hydroxide

E

sodium nitrite
7632-00-0

sodium nitrite

Conditions
ConditionsYield
In ammonia -33°C;
In ammonia NH3 (liquid); -33°C;
nitrogen(II) oxide
10102-43-9

nitrogen(II) oxide

sodium
7440-23-5

sodium

A

sodium hyponitrite

sodium hyponitrite

B

sodium nitrite
7632-00-0

sodium nitrite

Conditions
ConditionsYield
above 190°C;
above 190°C;
nitrogen(II) oxide
10102-43-9

nitrogen(II) oxide

sodium
7440-23-5

sodium

A

sodium nitrate
7631-99-4

sodium nitrate

B

sodium nitrite
7632-00-0

sodium nitrite

Conditions
ConditionsYield
heating with dry NO;
oxygen
80937-33-3

oxygen

sodium
7440-23-5

sodium

A

sodium hydroxide
1310-73-2

sodium hydroxide

B

sodium nitrite
7632-00-0

sodium nitrite

Conditions
ConditionsYield
In ammonia slow O2 flow;
In ammonia NH3 (liquid); slow O2 flow;
sodium nitrate
7631-99-4

sodium nitrate

sodium
7440-23-5

sodium

sodium nitrite
7632-00-0

sodium nitrite

Conditions
ConditionsYield
In ammonia molar ratio of Na:NaNO3 = 2:1;
In ammonia NH3 (liquid); molar ratio of Na:NaNO3 = 2:1;
sodium
7440-23-5

sodium

Nitrogen dioxide
10102-44-0

Nitrogen dioxide

sodium nitrite
7632-00-0

sodium nitrite

Conditions
ConditionsYield
at 22-105°C; pressure of NO2 less then 600 torr;
at 22-105°C; pressure of NO2 less then 600 torr;
sodium
7440-23-5

sodium

Nitrogen dioxide
10102-44-0

Nitrogen dioxide

A

sodium nitrate
7631-99-4

sodium nitrate

B

sodium nitrite
7632-00-0

sodium nitrite

Conditions
ConditionsYield
burning of Na in NO2 atmosphere;
slow oxidation of Na at the surface, above the melting point;
slow oxidation of Na at the surface, above the melting point;
burning of Na in NO2 atmosphere;
ammonia
7664-41-7

ammonia

sodium carbonate
497-19-8

sodium carbonate

oxygen

oxygen

sodium nitrite
7632-00-0

sodium nitrite

Conditions
ConditionsYield
In neat (no solvent) 2 volumeparts NH3 are combusted with 3 volumeparts O2; formed N2O3 (NO and NO2) is absorped by Na2CO3;;
In neat (no solvent) 2 volumeparts NH3 are combusted with 3 volumeparts O2; formed N2O3 (NO and NO2) is absorped by Na2CO3;;
Nitryl chloride

Nitryl chloride

sodium hydroxide
1310-73-2

sodium hydroxide

sodium nitrite
7632-00-0

sodium nitrite

dinitrogen trioxide
10544-73-7

dinitrogen trioxide

sodium nitrite
7632-00-0

sodium nitrite

Conditions
ConditionsYield
With sodium hydroxide In water byproducts: H2O; absorption of nitrosic gases in alkaline soln.;
With NaOH In water byproducts: H2O; absorption of nitrosic gases in alkaline soln.;
potassium nitrate

potassium nitrate

sodium hydroxide
1310-73-2

sodium hydroxide

sodium nitrite
7632-00-0

sodium nitrite

Conditions
ConditionsYield
With cast iron In melt melting of 500 kg KNO3 and 500 kg NaOH together; reaction of the melt with finely powdered cast iron for 5-6 h;;
sodium nitrite
7632-00-0

sodium nitrite

nitrogen(II) oxide
10102-43-9

nitrogen(II) oxide

Conditions
ConditionsYield
With acetic acid; potassium iodide In water Product distribution / selectivity;100%
With sulfuric acid; water at 10℃; under 375.038 Torr; for 1.38889E-05h; Reagent/catalyst; Temperature; Pressure; Time;99.99%
With maleic acid; ascorbic acid In water Product distribution / selectivity;
sulfur
7704-34-9

sulfur

sodium nitrite
7632-00-0

sodium nitrite

sodium thiosulfate

sodium thiosulfate

Conditions
ConditionsYield
In N,N-dimethyl-formamide byproducts: N2O; at about 80°C, under N2 or CO2, cooling, separation of Na2S2O3;; washing with acetone, analytically pure;;100%
In further solvent(s) byproducts: N2O; solvent: dimethyl acetamide, at about 80°C, under N2 or CO2, cooling, separation of Na2S2O3;; washing with acetone, analytically pure;;100%
fac-triaquotrinitroiridium(III)

fac-triaquotrinitroiridium(III)

sodium nitrite
7632-00-0

sodium nitrite

trisodium hexanitroiridate(III)

trisodium hexanitroiridate(III)

Conditions
ConditionsYield
In not given 100°C, 1 h;100%

sodium nitrite
7632-00-0

sodium nitrite

αβ-s-{Co(2-methyl-3,6,9-triazaundec-2-ene-1,11-diamine)NO2}(ZnCl4)
117229-37-5

αβ-s-{Co(2-methyl-3,6,9-triazaundec-2-ene-1,11-diamine)NO2}(ZnCl4)

Conditions
ConditionsYield
With ZnCl2 In hydrogenchloride soln. of Co-complex in HCl added NaNO2, heated for 20 min; soln. poured into 2-propanol/acetone (contained ZnCl2), cooled, powder collected, washed (acetone, Et2O), elem. anal.;100%
αβ-i-{Co(3,6,9-triazaundec-2-ene-1,11-diamine)Cl}(ClO4)2
117229-25-1

αβ-i-{Co(3,6,9-triazaundec-2-ene-1,11-diamine)Cl}(ClO4)2

sodium nitrite
7632-00-0

sodium nitrite

αβ-i-{Co(3,6,9-triazaundec-2-ene-1,11-diamine)NO2}(ZnCl4)
117229-27-3

αβ-i-{Co(3,6,9-triazaundec-2-ene-1,11-diamine)NO2}(ZnCl4)

Conditions
ConditionsYield
With ZnCl2 In perchloric acid soln. of Co-complex in HClO4 added NaNO2, heated for 20 min, poured into a acetone/2-propanol mixture with ZnCl2; cooled to 0°C, washed (acetone Et2O), elem. anal.;100%
tetrakis(methylisocyanide) boron triflate

tetrakis(methylisocyanide) boron triflate

sodium carbonate
497-19-8

sodium carbonate

sodium nitrite
7632-00-0

sodium nitrite

3Na(1+)*(B(CO2)2(CO2H)2)(3-)*2H2O=Na3(B(CO2)2(CO2H)2)*2H2O

3Na(1+)*(B(CO2)2(CO2H)2)(3-)*2H2O=Na3(B(CO2)2(CO2H)2)*2H2O

Conditions
ConditionsYield
In ethanol; sulfuric acid; water aq. H2SO4; B(CNCH3)4(CF3SO3)3 dissolved in H2O and cooled to 0°C, addn. of aq. mixt. of NO and NO2 prepd. from NaNO2, H2SO4, and H2O over 4 h, stirred for 16 h at room temp., addn. of Na2CO3 and ethanol; pptn., filtered, dissolved (H2O), soln. saturated with CO2, addn. of ethanol, pptn., filtered, washed (ethanol, diethyl ether);100%
[N,N'-bis(2-methyl-2-amino-κN-propyl)oxamidato-κ(2)N,N']copper(II)
252258-61-0

[N,N'-bis(2-methyl-2-amino-κN-propyl)oxamidato-κ(2)N,N']copper(II)

copper(II) nitrate

copper(II) nitrate

sodium nitrite
7632-00-0

sodium nitrite

catena-poly[copper(II)-μ-[N,N'-bis(2-methyl-2-aminopropyl)oxamido(2-)-N,N',O':N'',N''',O]copper(II)-di-μ-nitrito(-)-O]
252258-63-2

catena-poly[copper(II)-μ-[N,N'-bis(2-methyl-2-aminopropyl)oxamido(2-)-N,N',O':N'',N''',O]copper(II)-di-μ-nitrito(-)-O]

Conditions
ConditionsYield
In methanol; water addn. of aq. Cu(NO3)2 and then aq. NaNO2 to Cu-complex (in MeOH) with stirring (pptn.); collection (filtration), washing (MeOH, Et2O), drying in air; elem. anal.;98%
tetrafluoroboric acid

tetrafluoroboric acid

2,6-dimethoxyaniline
2734-70-5

2,6-dimethoxyaniline

sodium nitrite
7632-00-0

sodium nitrite

2,6-dimethoxybenzenediazonium tetrafluoroborate

2,6-dimethoxybenzenediazonium tetrafluoroborate

Conditions
ConditionsYield
In water at 0℃; for 0.75h;98%
tetrafluoroboric acid

tetrafluoroboric acid

3,4,5-Trimethoxyaniline
24313-88-0

3,4,5-Trimethoxyaniline

sodium nitrite
7632-00-0

sodium nitrite

3,4,5-trimethoxybenzenediazonium tetrafluoroborate

3,4,5-trimethoxybenzenediazonium tetrafluoroborate

Conditions
ConditionsYield
In water at 0℃; for 0.5h;98%
Stage #1: tetrafluoroboric acid; 3,4,5-Trimethoxyaniline In water at 0℃; for 0.25h;
Stage #2: sodium nitrite In water at 0℃; for 0.5h;
copper(II) perchlorate hexahydrate

copper(II) perchlorate hexahydrate

3,3'-Diamino-N-methyldipropylamine
105-83-9

3,3'-Diamino-N-methyldipropylamine

sodium nitrite
7632-00-0

sodium nitrite

[Cu(3,3'-diamino-N-methyldipropylamine)(ONO)(H2O)]ClO4
890850-35-8

[Cu(3,3'-diamino-N-methyldipropylamine)(ONO)(H2O)]ClO4

Conditions
ConditionsYield
In methanol soln. of Cu salt added to soln. of org. compd., hot soln. of NaNO2 addeddropwise, heated for 10 min; hot filtered, allowed to crystallize at room temp., filtered, washed with ether, air-dried; elem. anal.;97%
(2-aza-5,10,15,20-tetraphenyl-21-carbaporphyrinato)FeBr

(2-aza-5,10,15,20-tetraphenyl-21-carbaporphyrinato)FeBr

sodium nitrite
7632-00-0

sodium nitrite

[Fe(CTPP)NO]

[Fe(CTPP)NO]

Conditions
ConditionsYield
1 equiv of NaNO2 under inert atm. at ambient temp.; silica gel column chromy. in a room atm.;97%
zinc perchlorate

zinc perchlorate

6,16,2,5-tribenzena(1,4)-1,4,8,11,14,18,23,27-octaazabicyclo[9.9.9]nonacosaphane
119142-71-1

6,16,2,5-tribenzena(1,4)-1,4,8,11,14,18,23,27-octaazabicyclo[9.9.9]nonacosaphane

sodium nitrite
7632-00-0

sodium nitrite

[pCZn2(μ-ONO)](ClO4)3

[pCZn2(μ-ONO)](ClO4)3

Conditions
ConditionsYield
Stage #1: zinc perchlorate; 6,16,2,5-tribenzena(1,4)-1,4,8,11,14,18,23,27-octaazabicyclo[9.9.9]nonacosaphane In methanol at 20℃; for 0.5h;
Stage #2: sodium nitrite In methanol for 12h;
97%
[Ru(N,N-dimethyl-4,6-di(pyridin-2-yl)-1,3,5-triazin-2-amine)(2,2'-bipyridine)(CH3CN)](ClO4)2

[Ru(N,N-dimethyl-4,6-di(pyridin-2-yl)-1,3,5-triazin-2-amine)(2,2'-bipyridine)(CH3CN)](ClO4)2

sodium nitrite
7632-00-0

sodium nitrite

[Ru(N,N-dimethyl-4,6-di(pyridin-2-yl)-1,3,5-triazin-2-amine)(2,2'-bipyridine)(NO2)](ClO4)

[Ru(N,N-dimethyl-4,6-di(pyridin-2-yl)-1,3,5-triazin-2-amine)(2,2'-bipyridine)(NO2)](ClO4)

Conditions
ConditionsYield
In water; acetone for 12h; Reflux; Inert atmosphere;96.89%
[Ru(η2-C6HCPhCH-1-O-2-CHNHEt-3-NO2-4-Me-5)(PPh3)2(CO)Cl]
350832-46-1

[Ru(η2-C6HCPhCH-1-O-2-CHNHEt-3-NO2-4-Me-5)(PPh3)2(CO)Cl]

sodium nitrite
7632-00-0

sodium nitrite

[Ru(η2-C6HCPhCH-1-O-2-CHNHEt-3-NO2-4-Me-5)(PPh3)2(CO)(NO2)]

[Ru(η2-C6HCPhCH-1-O-2-CHNHEt-3-NO2-4-Me-5)(PPh3)2(CO)(NO2)]

Conditions
ConditionsYield
In dichloromethane; water; acetone aq. soln. of NaNO2 added dropwise to Ru complex soln. in CH2Cl2/acetone,stirred for 5 h; solvent removed (vac.), filtered, washed (H2O), dried (vac.); elem. anal.;96%
tetrafluoroboric acid

tetrafluoroboric acid

sulfamethizole
144-82-1

sulfamethizole

sodium nitrite
7632-00-0

sodium nitrite

C9H8N5O2S2(1+)*BF4(1-)

C9H8N5O2S2(1+)*BF4(1-)

Conditions
ConditionsYield
In water at 0℃; for 0.75h; Inert atmosphere;96%
hydrogenchloride
7647-01-0

hydrogenchloride

ruthenium trichloride

ruthenium trichloride

sodium nitrite
7632-00-0

sodium nitrite

ruthenium(II)nitrosyl trichloride

ruthenium(II)nitrosyl trichloride

Conditions
ConditionsYield
In water for 4h; Heating / reflux;95%
C6F5Ni(P(CH3)2C6H5)2Br

C6F5Ni(P(CH3)2C6H5)2Br

sodium nitrite
7632-00-0

sodium nitrite

C6F5Ni(P(CH3)2C6H5)2NO2

C6F5Ni(P(CH3)2C6H5)2NO2

Conditions
ConditionsYield
In water; acetone prepn. from C6F5Ni(CH3)2C6H5)2Br and excess of NaNO2 in aq. acetone under reflux;;95%
In water; acetone prepn. from C6F5Ni(CH3)2C6H5)2Br and excess of NaNO2 in aq. acetone under reflux;;95%

Sodium Nitrite Consensus Reports

Reported in EPA TSCA Inventory. EPA Genetic Toxicology Program.

Sodium Nitrite Standards and Recommendations

DOT Classification:  5.1; Label: Oxidizer

Sodium Nitrite Specification

Sodium Nitrite, its cas register number is 7632-00-0. It also can be called Anti-rust; Azotyn sodowy; Diazotizing salts;Dusitan sodny; Erinitrit; Filmerine; Natrium nitrit; Nitrite de sodium; Nitrito sodico. Sodium nitrite is the inorganic compound with the chemical formula NaNO2. It is a white to slight yellowish crystalline powder that is very soluble in water and is hygroscopic.It is a Nitrous acid sodium salt. And it is used in many industrial processes, in meat curing, coloring, and preserving, and as a reagent in analytical chemistry techniques. It is used therapeutically as an antidote in cyanide poisoning. The compound is toxic and mutagenic and will react in vivo with secondary or tertiary amines thereby producing highly carcinogenic nitrosamines.

Preparation of Sodium Nitrite: 
Sodium Nitrite is prepared by treating sodium hydroxide with mixtures of nitrogen dioxide and nitric oxide:
2 NaOH + NO2 + NO → 2 NaNO2 + H2O
The conversion is sensitive to the presence of oxygen, which can lead to varying amounts of sodium nitrate.
In former times, sodium nitrite was prepared by reduction of sodium nitrate with various metals.

Uses of Sodium Nitrite: 
Sodium nitrite (NaNO2) is a chemical compound commonly used in fertilizers, food preservatives, smoke bombs, as a color fixative, dyes and pyrotechnics.The main use of sodium nitrite is for the industrial production of organonitrogen compounds. It is a reagent for conversion of amines into diazo compounds.Sodium nitrite can be used as part of an intravenous mixture to treat cyanide poisoning.It is well known for its role in inhibiting the growth of Clostridium botulinum spores in refrigerated meats.

Safety information of Sodium Nitrite:
When you are using Sodium Nitrite, please be cautious about it as the following:(1)In case of accident or if you feel unwell, seek medical advice immediately (show label where possible); (2)Avoid release to the environment. Refer to special instructions safety data sheet; (3)Wear suitable protective clothing; (4)In case of contact with eyes, rinse immediately with plenty of water and seek medical advice;

You can still convert the following datas into molecular structure:
(1)InChI=1S/HNO2.Na/c2-1-3;/h(H,2,3);/q;+1/p-1;
(2)InChIKey=LPXPTNMVRIOKMN-UHFFFAOYSA-M;
(3)SmilesN(=O)[O-].[Na+];

The toxicity data of Sodium Nitrite is as follows:

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
cat LDLo oral 1500mg/kg (1500mg/kg)   "Abdernalden's Handbuch der Biologischen Arbeitsmethoden." Vol. 4, Pg. 1372, 1935.
cat LDLo subcutaneous 35mg/kg (35mg/kg) GASTROINTESTINAL: CHANGES IN STRUCTURE OR FUNCTION OF SALIVARY GLANDS

LUNGS, THORAX, OR RESPIRATION: CYANOSIS

LUNGS, THORAX, OR RESPIRATION: DYSPNEA
Naunyn-Schmiedeberg's Archiv fuer Experimentelle Pathologie und Pharmakologie. Vol. 126, Pg. 209, 1927.
chicken LD50 oral 28944ug/kg (28.944mg/kg)   American Journal of Veterinary Research. Vol. 30, Pg. 2185, 1969.
 
child LDLo oral 22mg/kg (22mg/kg) VASCULAR: OTHER CHANGES Lancet. Vol. 2, Pg. 162, 1917.
dog LDLo intravenous 15mg/kg (15mg/kg)   "Drug Dosages in Laboratory Animals - A Handbook," Rev. ed., Barnes, C.D., and L.G. Eltherington, Berkeley, Univ. of California Press, 1973Vol. -, Pg. 245, 1973.
dog LDLo oral 330mg/kg (330mg/kg)   "Drug Dosages in Laboratory Animals - A Handbook," Rev. ed., Barnes, C.D., and L.G. Eltherington, Berkeley, Univ. of California Press, 1973Vol. -, Pg. 245, 1973.
dog LDLo subcutaneous 60mg/kg (60mg/kg) BEHAVIORAL: CONVULSIONS OR EFFECT ON SEIZURE THRESHOLD

PERIPHERAL NERVE AND SENSATION: FLACCID PARALYSIS WITHOUT ANESTHESIA (USUALLY NEUROMUSCULAR BLOCKAGE)

GASTROINTESTINAL: NAUSEA OR VOMITING
Archives Internationales de Pharmacodynamie et de Therapie. Vol. 21, Pg. 425, 1911.
frog LDLo subcutaneous 1gm/kg (1000mg/kg)   "Abdernalden's Handbuch der Biologischen Arbeitsmethoden." Vol. 4, Pg. 1372, 1935.
human LDLo oral 71mg/kg (71mg/kg) BEHAVIORAL: COMA

BLOOD: METHEMOGLOBINEMIA-CARBOXYHEMOGLOBIN

GASTROINTESTINAL: NAUSEA OR VOMITING
"Toxicology of Drugs and Chemicals," Deichmann, W.B., New York, Academic Press, Inc., 1969Vol. -, Pg. 543, 1969.
human TDLo oral 14mg/kg (14mg/kg) GASTROINTESTINAL: NAUSEA OR VOMITING

BEHAVIORAL: CHANGES IN MOTOR ACTIVITY (SPECIFIC ASSAY)

VASCULAR: REGIONAL OR GENERAL ARTERIOLAR OR VENOUS DILATION
Deutsche Medizinische Wochenschrift. Vol. 74, Pg. 961, 1949.
man LDLo oral 321mg/kg (321mg/kg) BEHAVIORAL: COMA

LUNGS, THORAX, OR RESPIRATION: CYANOSIS

BLOOD: METHEMOGLOBINEMIA-CARBOXYHEMOGLOBIN
Israel Journal of Medical Sciences. Vol. 28, Pg. 289, 1992.
 
man TDLo oral 1714ug/kg/70M (1.714mg/kg) CARDIAC: PULSE RATE INCREASE WITHOUT FALL IN BP

VASCULAR: BP LOWERING NOT CHARACTERIZED IN AUTONOMIC SECTION
Journal of Clinical Investigation. Vol. 16, Pg. 73, 1937.
mouse LD50 intraperitoneal 158mg/kg (158mg/kg)   Journal of Pharmacology and Experimental Therapeutics. Vol. 165, Pg. 30, 1969.
 
mouse LD50 oral 175mg/kg (175mg/kg) VASCULAR: REGIONAL OR GENERAL ARTERIOLAR OR VENOUS DILATION

VASCULAR: BP LOWERING NOT CHARACTERIZED IN AUTONOMIC SECTION
FAO Nutrition Meetings Report Series. Vol. 53A, Pg. 97, 1974.
mouse LDLo subcutaneous 150mg/kg (150mg/kg) BEHAVIORAL: EXCITEMENT

LUNGS, THORAX, OR RESPIRATION: RESPIRATORY STIMULATION

GASTROINTESTINAL: NAUSEA OR VOMITING
Archives Internationales de Pharmacodynamie et de Therapie. Vol. 35, Pg. 480, 1929.
rabbit LD50 oral 186mg/kg (186mg/kg)   Southwestern Veterinarian. Vol. 27, Pg. 246, 1974.
rabbit LDLo intravenous 80mg/kg (80mg/kg) PERIPHERAL NERVE AND SENSATION: SPASTIC PARALYSIS WITH OR WITHOUT SENSORY CHANGE

BEHAVIORAL: COMA

KIDNEY, URETER, AND BLADDER: URINE VOLUME INCREASED
Journal of Pharmacology and Experimental Therapeutics. Vol. 41, Pg. 121, 1931.
rabbit LDLo subcutaneous 60mg/kg (60mg/kg)   "Abdernalden's Handbuch der Biologischen Arbeitsmethoden." Vol. 4, Pg. 1372, 1935.
rat LC50 inhalation 5500ug/m3/4H (5.5mg/m3)   Gigiena Truda i Professional'nye Zabolevaniya. Labor Hygiene and Occupational Diseases. Vol. 16(10), Pg. 36, 1972.
rat LD50 intravenous 65mg/kg (65mg/kg)   Arzneimittel-Forschung. Drug Research. Vol. 13, Pg. 320, 1963.
rat LD50 oral 180mg/kg (180mg/kg)   American Industrial Hygiene Association Journal. Vol. 30, Pg. 470, 1969.
 
rat LD50 subcutaneous 96600ug/kg (96.6mg/kg)   Archives of Toxicology, Supplement. Vol. 14, Pg. 231, 1991.
 

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