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Name	2-Chloro-4-nitropyridine 1-oxide	EINECS	238-404-6
CAS No.	14432-16-7	Density	1.62 g/cm³
PSA	71.28000	LogP	2.19990
Solubility	N/A	Melting Point	52-56 °C(lit.)
Formula	C₅H₃ClN₂O₃	Boiling Point	405.9 °C at 760 mmHg
Molecular Weight	174.543	Flash Point	199.3 °C
Transport Information	UN 2811 6.1/PG 3	Appearance	light yellow solid
Safety	26-36-45-36/37/39-28	Risk Codes	23/24/25-36/37/38
Molecular Structure		Hazard Symbols	T
Synonyms	2-Chloro-4-nitropyridine N-oxide;NSC 527701;Pyridine,2-chloro-4-nitro-, 1-oxide;	Article Data	23

2-Chloro-4-nitropyridine 1-oxide Synthetic route

: 2402-95-1
2-chloropyridine-N-oxide

: 14432-16-7
2-chloro-4-nitropyridine-N-oxide

Conditions

Conditions	Yield
nitration;	93%
With sulfuric acid; nitric acid at 90℃; for 4h;	78%
With sulfuric acid; nitric acid for 2h; Nitration;	72%

: 23056-36-2
2-chloro-4-nitropyridine

: 14432-16-7
2-chloro-4-nitropyridine-N-oxide

Conditions

Conditions	Yield
Stage #1: 2-chloro-4-nitropyridine With urea hydrogen peroxide adduct; trifluoroacetic acid In dichloromethane at 0 - 20℃; for 72h; Stage #2: With sodium dithionite In dichloromethane; water for 0.25h; Stage #3: With hydrogenchloride In dichloromethane; water	90%
With urea hydrogen peroxide adduct; trifluoroacetic anhydride In dichloromethane at 0 - 20℃; for 4.5h;	84%

: 20295-64-1
2-chloropyridine N-oxide hydrochloride

: 14432-16-7
2-chloro-4-nitropyridine-N-oxide

Conditions

Conditions	Yield
With sulfuric acid; nitric acid at 90 - 100℃; for 2.5h;	82.5%
With sodium hydroxide; nitric acid In sulfuric acid	37%
With sulfuric acid; nitric acid In (2S)-N-methyl-1-phenylpropan-2-amine hydrate
With sulfuric acid; nitric acid In (2S)-N-methyl-1-phenylpropan-2-amine hydrate

: 109-09-1
2-chloropyridine

: 14432-16-7
2-chloro-4-nitropyridine-N-oxide

Conditions

Conditions	Yield
Multi-step reaction with 2 steps 1: 91 percent / aq. H2O2 / trifluoroacetic acid / 4 h 2: 72 percent / aq. HNO3, H2SO4 / 2 h View Scheme
Multi-step reaction with 2 steps 1: 30percent aq. H2O2, AcOH / 48 h / 60 °C 2: HNO3, conc. H2SO4 / 2.5 h / 90 °C View Scheme
Multi-step reaction with 2 steps 1: H2O2 / acetic anhydride 2: HNO3, H2SO4 View Scheme

: 14150-95-9
2-aminopyridine N-oxide

: 14432-16-7
2-chloro-4-nitropyridine-N-oxide

Conditions

Conditions	Yield
Multi-step reaction with 3 steps 1: concentrated sulfuric acid; peroxomonosulfuric acid 3: concentrated sulfuric acid; nitric acid View Scheme

: 2403-02-3
4-carboxy-2-nitropyridine N-oxide

: 14432-16-7
2-chloro-4-nitropyridine-N-oxide

Conditions

Conditions	Yield
Multi-step reaction with 2 steps 2: concentrated sulfuric acid; nitric acid View Scheme

: 2402-95-1
2-chloropyridine-N-oxide

A: 14432-16-7
2-chloro-4-nitropyridine-N-oxide

B 2-Chloro-4-nitropyidine-N oxide: 2-Chloro-4-nitropyidine-N oxide

Conditions

Conditions	Yield
With sulfuric acid; nitric acid

: 14432-16-7
2-chloro-4-nitropyridine-N-oxide

: 1-amino-propan-2-ol

: 1-(4-nitro-1-oxy-pyridin-2-ylamino)-propan-2-ol

Conditions

Conditions	Yield
In ethanol at 80℃; for 13h;	99%

: 14432-16-7
2-chloro-4-nitropyridine-N-oxide

: 14432-12-3
4-Amino-2-chloropyridine

Conditions

Conditions	Yield
With hydrogenchloride; iron In ethanol for 3h; Reduction; Heating;	95%
With hydrogen; Ra-Ni In methanol	90%
With hydrogenchloride; iron In ethanol; water Reflux;	85%

: 14432-16-7
2-chloro-4-nitropyridine-N-oxide

: 13602-59-0
2,4-dichloropyridine 1-oxide

Conditions

Conditions	Yield
With acetyl chloride at 70 - 75℃; for 0.416667h;	94%
With acetyl chloride for 0.666667h;	80%

2-Chloro-4-nitropyridine 1-oxide Chemical Properties

The Molecular Structure of 2-Chloro-4-nitropyridine 1-oxide (CAS NO.14432-16-7):

Empirical Formula: C₅H₃ClN₂O₃
Molecular Weight: 174.5419
Nominal Mass: 174 Da
Average Mass: 174.5419 Da
Monoisotopic Mass: 173.98322 Da
Index of Refraction: 1.629
Molar Refractivity: 38.1 cm³
Molar Volume: 107.1 cm³
Surface Tension: 67 dyne/cm
Density: 1.62 g/cm³
Flash Point: 199.3 °C
Enthalpy of Vaporization: 63.2 kJ/mol
Boiling Point: 405.9 °C at 760 mmHg
Melting Point :151-155°C
Vapour Pressure: 1.98E-06 mmHg at 25°C
Appearance: light yellow solid
IUPAC Name: 2-chloro-4-nitro-1-oxidopyridin-1-ium
Synonyms: Otava-bb bb7017520053 ; Aurora 23245 ; (2-Chloropyridin-4-yl)(hydroxy)oxoammonium ; 2-Chloro-4-nitropyridine 1-oxide ; 2-Chloro-4-nitropyridine-n-oxide ; Akos bbs-00001358 ; 2-Chloro-4-nitro-1-oxidopyridin-1-ium ; 2-Chloro-4-nitropyridine-n-oxide ,97%
Product Categories: Pyridine;Pyridines;C5Heterocyclic Building Blocks;Halogenated Heterocycles;Heterocyclic Building Blocks

2-Chloro-4-nitropyridine 1-oxide Safety Profile

Hazard Codes: Toxic T
Risk Statements: 23/24/25-36/37/38
R23/24/25: Toxic by inhalation, in contact with skin and if swallowed
R36/37/38: Irritating to eyes, respiratory system and skin
Safety Statements: 26-36-45-36/37/39-28
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice
S36: Wear suitable protective clothing
S36/37/39: Wear suitable protective clothing, gloves and eye/face protection
S28:After contact with skin, wash immediately with plenty of soap-suds
RIDADR: UN 2811 6.1/PG 3
WGK Germany: 3

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