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| CAS No.: | 7758-09-0 |
|---|---|
| Name: | Potassium nitrite(III) |
| Article Data: | 120 |
| Molecular Structure: | |
|
|
|
| Formula: | KNO2 |
| Molecular Weight: | 85.1038 |
| Synonyms: | Nitrousacid, potassium salt (8CI,9CI);E 249;Klear;Nitrous acid, potassiumsalt (1:1);Potassium nitrite (1:1); |
| EINECS: | 231-832-4 |
| Density: | 1,92 g/cm3 |
| Melting Point: | 350 °C (dec.)(lit.) |
| Appearance: | white to yellow crystals |
| Hazard Symbols: |
 O, T, N
|
| Risk Codes: | 8-25-50 |
| Safety: | 45-61 |
| Transport Information: | UN 1488 5.1/PG 2 |
| PSA: | 52.49000 |
| LogP: | 0.25060 |
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| 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% |
- 1493-05-6
difluoro-nitro-methane
- 865-47-4
potassium tert-butylate
B
- 7758-09-0
potassium nitrite
C
- 105-58-8
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% |
- 1493-05-6
difluoro-nitro-methane
- 917-58-8
potassium ethoxide
B
- 7758-09-0
potassium nitrite
C
- 105-58-8
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.; |
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- Total:20 Page 1 of 1 1
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Chemistry
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
Uses
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.
Toxicity Data With Reference
| 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. |
Consensus Reports
Reported in EPA TSCA Inventory.
Safety Profile
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
Standards and Recommendations
DOT Classification: 5.1; Label: Oxidizer
Specification
Potassium nitrite (1:1) (CAS NO.7758-09-0), its Synonyms are Nitrous acid, potassium salt ; Nitrous acid, potassium salt (1:1) ; Potassium nitrite .