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4-Nitroquinoline N-oxide

4-Nitroquinoline N-oxide structure

CAS No.: 56-57-5

Chemical Name:: 4-Nitroquinoline N-oxide

Synonyms: 4-NITROQUINOLINE 1-OXIDE;NQO;NQNO;4-nqo;4-NDQ;4-NQNO;nitrochin;N-(4-Nitrobenz;Sigma N8141 4-NQO;Nitroquinolineoxide

CBNumber:: CB1150485

Molecular Formula:: C9H6N2O3

Molecular Weight:: 190.16

MDL Number:: MFCD00006738

MOL File:: 56-57-5.mol

MSDS File:: SDS

TDS File:: TDS

Last updated:2026-09-12 18:48:46

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4-Nitroquinoline N-oxide Properties

Melting point	154-156 °C(lit.)
Boiling point	325.64°C (rough estimate)
Density	1.42
refractive index	1.5570 (estimate)
storage temp.	-20°C
solubility	acetone: clear to hazy
form	Crystalline Solid
pka	-1.83±0.10(Predicted)
color	yellow to brown
BRN	165756
Stability	Stable. Hygroscopic, light-sensitive. Incompatible with strong oxidizing agents.
InChI	InChI=1S/C9H6N2O3/c12-10-6-5-9(11(13)14)7-3-1-2-4-8(7)10/h1-6H
InChIKey	YHQDZJICGQWFHK-UHFFFAOYSA-N
SMILES	N(C1=CC=N(C2C=CC=CC=21)=O)(=O)=O
CAS DataBase Reference	56-57-5(CAS DataBase Reference)
EWG's Food Scores	1
NCI Dictionary of Cancer Terms	4-nitroquinoline 1-oxide; 4-NQO
FDA UNII	X5081510EV
EPA Substance Registry System	4-Nitroquinoline 1-oxide (56-57-5)
UNSPSC Code	12352100
NACRES	NA.22

SAFETY

Risk and Safety Statements

Symbol(GHS)

GHS08

Signal word

Danger

Hazard statements

H350

Precautionary statements

P201-P308+P313

PPE

Eyeshields, Gloves, type P2 (EN 143) respirator cartridges

Hazard Codes

Risk Statements

45-68-40-20/21/22

Safety Statements

53-45-36/37-22

RIDADR

2811

WGK Germany

RTECS

VC2100000

HazardClass

6.1

PackingGroup

HS Code

29339900

Storage Class

6.1C - Combustible acute toxic Cat.3
toxic compounds or compounds which causing chronic effects

Hazard Classifications

Carc. 1B

Hazardous Substances Data

56-57-5(Hazardous Substances Data)

Toxicity

LD50 intraperitoneal in mouse: 190mg/kg

NFPA 704

	1
0		1

4-Nitroquinoline N-oxide price More Price(50)

Manufacturer	Product number	Product description	CAS number	Packaging	Price	Updated	Buy
Sigma-Aldrich	N8141	4-Nitroquinoline N-oxide ≥98%	56-57-5	1g	$90.7	2026-04-30	Buy
Sigma-Aldrich	N8141	4-Nitroquinoline N-oxide ≥98%	56-57-5	5g	$581	2026-04-30	Buy
TCI Chemical	N0250	4-Nitroquinoline N-Oxide >98.0%(HPLC)(T)	56-57-5	1g	$105	2026-04-30	Buy
TCI Chemical	N0250	4-Nitroquinoline N-Oxide >98.0%(HPLC)(T)	56-57-5	5g	$324	2026-04-30	Buy
Cayman Chemical	42994	4-NDQ ≥98%	56-57-5	100mg	$28	2026-04-30	Buy

Product number	Packaging	Price	Buy
N8141	1g	$90.7	Buy
N8141	5g	$581	Buy
N0250	1g	$105	Buy
N0250	5g	$324	Buy
42994	100mg	$28	Buy

4-Nitroquinoline N-oxide Chemical Properties, Uses, Production

Chemical Properties

yellow-brown crystals or powder

Uses

4-Nitroquinoline N-Oxide is used in method for constructing animal model of oral mucosal malignancy related to Kras mutation.

Uses

4-Nitroquinoline N-oxide has been used as a model compound to study its carcinogenic effects.

Definition

ChEBI: A quinoline N-oxide carrying a nitro substituent at position 4.

General Description

Yellowish-brown plates or needles or yellow solid.

Air & Water Reactions

4-NITROQUINOLINE N-OXIDE is hygroscopic and light sensitive. Insoluble in water.

Reactivity Profile

4-NITROQUINOLINE N-OXIDE reacts with strong oxidizing agents.

Health Hazard

ACUTE/CHRONIC HAZARDS: 4-NITROQUINOLINE N-OXIDE may cause irritation. When heated to decomposition it may emit toxic fumes of carbon monoxide, carbon dioxide and nitrogen oxides.

Fire Hazard

Flash point data for 4-NITROQUINOLINE N-OXIDE are not available; however, 4-NITROQUINOLINE N-OXIDE is probably combustible.

Biochem/physiol Actions

Skin and lung tumor initiator under experimental conditions.

Safety Profile

Suspected carcinogen with experimental carcinogenic, neoplas tigenic, and tumorigenic data. Poison by intraperitoneal and subcutaneous routes. An experimental teratogen. Other experimental reproductive effects. Human mutation data reported. When heated to decomposition it emits toxic fumes of NOx.

Purification Methods

The N-oxide recrystallises from aqueous acetone as yellow needles or platelets. [Ochiai J Org Chem 18 534 1953, Seki et al. J Phys Chem 91 126 1987, Beilstein 20 III/IV 3396.]

4-Nitroquinoline N-oxide Preparation Products And Raw materials

Raw materials

Quinoline Hydrogen peroxide Trifluoroacetic acid Trifluoromethanesulfonic acid Nitric acid

Acetic acid Sulfuric acid Potassium nitrate 2,6-Di-O-methyl-beta-cyclodextrin

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Preparation Products

4-Nitroquinoline 2,4-Dibromoquinoline 4-Bromoquinoline 4-Chloro-5,6,7,8-tetrahydroquinoline

4-Nitroquinoline N-oxide Suppliers

Global Suppliers ( 229)

Supplier	Tel	Email	Country	ProdList	Advantage
Wuxi Renyi New Materials Technology Co., Ltd	13306222239	wangmeili@renyiam.com	China	558	58
Nanjing Datang Pharmaceutical Technology Co., Ltd.	025-84341491 13951930983	821832400@qq.com	China	300	58
Suzhou Kanei Pharmaceutical and Chemical Co., LTD	86-18051235979 18051235979	suzhoushikanie@163.com	China	74	58
Shanghai Rechem science Co., Ltd.	021-31433387 15618786686	sales@rechemscience.com	China	2970	58
J & K SCIENTIFIC LTD.	18210857532 18210857532	jkinfo@jkchemical.com	China	96815	76
Meryer (Shanghai) Chemical Technology Co., Ltd.	4006356688 18621169109	market03@meryer.com	China	40202	62
3B Pharmachem (Wuhan) International Co.,Ltd.	18930552037	3bsc@sina.com	China	15813	69
Alfa Aesar	400-6106006	saleschina@alfa-asia.com	China	30103	84
TCI (Shanghai) Development Co., Ltd.	021-67121386	Sales-CN@TCIchemicals.com	China	24512	81
JinYan Chemicals(ShangHai) Co.,Ltd.	13817811078	sales@jingyan-chemical.com	China	9963	60

Supplier	Advantage
Wuxi Renyi New Materials Technology Co., Ltd	58
Nanjing Datang Pharmaceutical Technology Co., Ltd.	58
Suzhou Kanei Pharmaceutical and Chemical Co., LTD	58
Shanghai Rechem science Co., Ltd.	58
J & K SCIENTIFIC LTD.	76
Meryer (Shanghai) Chemical Technology Co., Ltd.	62
3B Pharmachem (Wuhan) International Co.,Ltd.	69
Alfa Aesar	84
TCI (Shanghai) Development Co., Ltd.	81
JinYan Chemicals(ShangHai) Co.,Ltd.	60

View Latest Price from 4-Nitroquinoline N-oxide manufacturers

Update time	Product	Price	Min. Order	Purity	Supply Ability	Manufacturer
2026-08-20	4-NITROQUINOLINE N-OXIDE 56-57-5	$1.10	1g	99.00%	100 Tons	Dideu Industries Group Limited
2026-07-15	4-Nitroquinoline 1-oxide 56-57-5	$56.00		99.41%	10g	TargetMol Chemicals Inc.
2021-10-14	4-NITROQUINOLINE N-OXIDE 56-57-5	$10.00	1Kg/Bag	99%	20 tons	Hebei Zhanyao Biotechnology Co. Ltd

4-NITROQUINOLINE N-OXIDE
56-57-5
$1.10
99.00%
Dideu Industries Group Limited

4-Nitroquinoline 1-oxide
56-57-5
$56.00
99.41%
TargetMol Chemicals Inc.

4-NITROQUINOLINE N-OXIDE
56-57-5
$10.00
99%
Hebei Zhanyao Biotechnology Co. Ltd

4-Nitroquinoline N-oxide Spectrum

4-NITROQUINOLINE N-OXIDE(56-57-5)MS 4-NITROQUINOLINE N-OXIDE(56-57-5)¹HNMR 4-NITROQUINOLINE N-OXIDE(56-57-5)¹³CNMR 4-NITROQUINOLINE N-OXIDE(56-57-5)IR1 4-NITROQUINOLINE N-OXIDE(56-57-5)IR2 4-NITROQUINOLINE N-OXIDE(56-57-5)IR3

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TIMTEC-BB SBB006266 4-nitrochinolinn-oxid 4-nitrochinolinn-oxid(swedish) 4-nitro-quinolin1-oxide 4-nitroquinolineoxide 4-nqo nitrochin Quinoline, 4-nitro-, 1-oxide 4-NQNO Nitroquinolineoxide N-NITROQUINOLINE-N-OXIDE, 1000MG, NEAT NITROQUINOLINE-N-OXIDE NITROQUINOLINE-1-OXIDE 4-Nitroquinoline-N-oxide, HPLC 98% 4-NITROQUINOLINE N-OXIDE POWDER 4-NITROQUINOLINE N-OXIDE 98+% 4-NITRO-1-QUINOLINIUMOLATE 4-NITROQUINOLINIUM-1-OLATE 4-NITROCHINOLINE-N-OXIDE N-(4-Nitrobenz 4-nitro-1-oxido-quinolin-1-ium 4-NitroquinolineN-Oxide> 4-Nitroquinoline-N-oxide, Comet assay grade 4-Nitroquinoline-1-oxide@100 μg/mL in Dichloromethane 4-NITROQUINOLINE N-OXIDE ISO 9001：2015 REACH NQNO NQO 4 Nitroquinoline 1 oxide,4Nitroquinoline 1oxide 4-Nitroquinoline N-Oxide, ≥ 98.0% 4-Nitroquinoline-N-oxide Solution in Methanol Cyclohexane Impurity 26 4-Nitroquinoline 1-oxide, 10 mM in DMSO 4-Nitroquinoline N-oxide 4-NDQ Sigma N8141 4-NQO 4-NITROQUINOLINE 1-OXIDE 4-Nitroquinoline N-oxide 56-57-5 Building Blocks Heterocyclic Building Blocks Quinolines Nitroquinolines pharmacetical Nitroquinolines Quinolines