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7632-00-0

Basic Information
CAS No.: 7632-00-0
Name: Sodium nitrite
Article Data: 189
Molecular Structure:
Molecular Structure of 7632-00-0 (Sodium nitrite)
Formula: NaNO2
Molecular Weight: 68.9953
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;
EINECS: 231-555-9
Density: 2.168 g/cm3
Melting Point: 271 °C(lit.)
Boiling Point: 320 °C
Solubility: 820 g/L (20 °C) in water
Appearance: white to off-white powder
Hazard Symbols: OxidizingO, ToxicT, DangerousN, HarmfulXn
Risk Codes: 8-25-50-22-36/38
Safety: 45-61-36-26
Transport Information: UN 3219 5.1/PG 3
PSA: 52.49000
LogP: 0.25060
Synthetic route
7631-99-4

sodium nitrate

7632-00-0

sodium nitrite

1493-05-6

difluoro-nitro-methane

141-52-6

sodium ethanolate

A

sodium fluoride

B

7632-00-0

sodium nitrite

C

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

13477-34-4

calcium(II) nitrate

7757-83-7

sodium sulfite

A

calcium sulfate

B

7757-82-6

sodium sulfate

C

7632-00-0

sodium nitrite

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

difluoro-nitro-methane

141-52-6

sodium ethanolate

A

3812-32-6

carbonate(2-)

B

sodium fluoride

C

7632-00-0

sodium nitrite

D

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%
21824-10-2

fluorotrinitromethane

141-52-6

sodium ethanolate

A

17021-83-9

ethoxyfluorodinitromethane

B

sodium fluoride

C

7632-00-0

sodium nitrite

D

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%
96088-55-0

N,N-bis(methylsulfonyl)hydroxylamine

A

20277-69-4

sodium methansulfinate

B

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);
1310-73-2

sodium hydroxide

10102-44-0

Nitrogen dioxide

7632-00-0

sodium nitrite

sodium peroxide

16824-89-8, 12533-50-5

N-oxo-N-nitrosoamine

7632-00-0

sodium nitrite

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

sodium hyponitrite

10102-44-0

Nitrogen dioxide

A

7631-99-4

sodium nitrate

B

7632-00-0

sodium nitrite

Conditions
ConditionsYield
oxidation;
oxidation;
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Consensus Reports

Reported in EPA TSCA Inventory. EPA Genetic Toxicology Program.

Standards and Recommendations

DOT Classification:  5.1; Label: Oxidizer

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.