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2-Nitrotoluene

Overview Chemical Properties Application Production method Category Toxicity classification Acute toxicity Explosives hazardous characteristics Flammability Hazardous properties Storage and transportation characteristics Fire extinguishing agent Occupational Standard
2-Nitrotoluene
2-Nitrotoluene
CAS No.
88-72-2
Chemical Name:
2-Nitrotoluene
Synonyms
ONT;2NT;nsc9577;2-Nitrotol;o-nitrotoluol;2-Nitrotoluol;o-itrotoluene;O-NITROTOLUENE;o-nitro-toluen;2-NITROTOLUENE
CBNumber:
CB1854572
Molecular Formula:
C7H7NO2
Formula Weight:
137.14
MOL File:
88-72-2.mol

2-Nitrotoluene Properties

Melting point:
-9 °C
Boiling point:
225 °C(lit.)
Density 
1.163 g/mL at 25 °C(lit.)
refractive index 
n20/D 1.546(lit.)
Flash point:
223 °F
storage temp. 
2-8°C
solubility 
0.65g/l (experimental)
form 
Liquid
color 
Clear yellow to yellow-green
PH
6-8 (H2O)
explosive limit
1.47-8.8%(V)
Water Solubility 
0.44 g/L (20 ºC)
Merck 
14,6650
BRN 
1907580
Stability:
Stable. Combustible. Incompatible with oxidizing agents, strong bases, sulfuric acid, reducing agents, hydrogen, sodium.
CAS DataBase Reference
88-72-2(CAS DataBase Reference)
NIST Chemistry Reference
Benzene, 1-methyl-2-nitro-(88-72-2)
EPA Substance Registry System
Benzene, 1-methyl-2-nitro-(88-72-2)
SAFETY
  • Risk and Safety Statements
  • Hazard and Precautionary Statements (GHS)
Hazard Codes  T,N,F
Risk Statements  45-46-22-51/53-62-36/37/38-23/24/25-11-36-20/21/22
Safety Statements  53-45-61-27-16-36/37-26
RIDADR  UN 1664 6.1/PG 2
WGK Germany  3
RTECS  XT3150000
TSCA  Yes
HazardClass  6.1
PackingGroup  II
HS Code  29042000
Hazardous Substances Data 88-72-2(Hazardous Substances Data)
Symbol(GHS):
Signal word: Danger
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H302 Harmful if swallowed Acute toxicity,oral Category 4 Warning P264, P270, P301+P312, P330, P501
H340 May cause genetic defects Germ cell mutagenicity Category 1A, 1B Danger
H350 May cause cancer Carcinogenicity Category 1A, 1B Danger
H361 Suspected of damaging fertility or the unborn child Reproductive toxicity Category 2 Warning P201, P202, P281, P308+P313, P405,P501
H371 May cause damage to organs Specific target organ toxicity, single exposure Category 2 Warning P260, P264, P270, P309+P311, P405,P501
H373 May cause damage to organs through prolonged or repeated exposure Specific target organ toxicity, repeated exposure Category 2 Warning P260, P314, P501
H411 Toxic to aquatic life with long lasting effects Hazardous to the aquatic environment, long-term hazard Category 2
Precautionary statements:
P201 Obtain special instructions before use.
P202 Do not handle until all safety precautions have been read and understood.
P260 Do not breathe dust/fume/gas/mist/vapours/spray.
P264 Wash hands thoroughly after handling.
P264 Wash skin thouroughly after handling.
P270 Do not eat, drink or smoke when using this product.
P273 Avoid release to the environment.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P281 Use personal protective equipment as required.
P391 Collect spillage. Hazardous to the aquatic environment
P308+P313 IF exposed or concerned: Get medical advice/attention.
P405 Store locked up.
P501 Dispose of contents/container to..…

2-Nitrotoluene price More Price(10)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 438804 2-Nitrotoluene ≥99% 88-72-2 5ml $21.6 2017-11-08 Buy
Sigma-Aldrich 31567 2-Nitrotoluene analytical standard 88-72-2 250mg $25 2017-11-08 Buy
TCI Chemical N0275 2-Nitrotoluene >99.0%(GC) 88-72-2 25g $15 2017-11-08 Buy
TCI Chemical N0275 2-Nitrotoluene >99.0%(GC) 88-72-2 500g $32 2017-11-08 Buy
Alfa Aesar A13446 2-Nitrotoluene, 99+% 88-72-2 500g $32.2 2017-11-08 Buy

2-Nitrotoluene Chemical Properties,Uses,Production

Overview

O-nitrotoluene is also known as 2-nitrotoluene or 1-methyl-2-nitrobenzene,and is yellow oily transparent liquid. It has the smell of nitrobenzene. The relative density is 1.1629. The melting point is-2.9℃ (α-type, stable type),-9.5℃ (β-type, non-stable type). The boiling point is 221.7 °C, 118 °C (2.133×103Pa) and 50.0 °C (0.133×103Pa). The flash point is 106.1 °C (closed system). The refractive index is 1.5450. The viscosity is 0.0262 mPa•s (15℃). The vapor pressure (×103 Pa) is 10.906 (5℃), 12.639 (10℃), 14.612 (20℃), 15.892 (30℃). It is slightly soluble in water (0.061 at 30°C), soluble in benzene, chloroform and petroleum ether and immiscible with ethanol and ether. It can evaporate together with water vapor. Due to the strong electron-withdrawing ability of nitro group, the methyl of is easy to be oxidized to form o-nitrobenzaldehyde or o-nitrobenzoic acid according to oxidation conditions. And o-nitrotoluene can be reduced in the presence of catalyst to generate o-toluidine, which can generate 2,4 or 2,6 dinitrotoluene after further nitration. O-nitrotoluene can also be chlorinated to generate nitrobenzyl chloride. In addition, o-nitrotoluene can also generate azo compounds. LD50 (rat oral) is 801mg/kg.
O-nitrotoluene is mainly used as the raw material of dyestuffs to prepare 4-chloro-2-nitrotoluene, 6-chloro-2-nitrotoluene, o-toluidine, o-tolidine, 2,6-dichlorobenzaldehyde and other dyestuffs intermediates, in which 4-chloro-2-nitrotoluene is a pharmaceutical raw material and o-toluidine is the raw material of pesticide fungicides and spices. O-nitrotoluene is a pharmaceutical raw material to prepare 2,2'-dinitrobenzene, o-nitrobenzyl bromide, bromine alkane and other medicines, and is also the raw material to prepare indole to be used as amino acids and plant growth regulators. O-nitrotoluene is the raw material to prepare dinitrotoluene to be used as powder. O-toluidine can also be used as vulcanization accelerator and to prepare o-nitrobenzoic acid as pharmaceutical raw material.

Chemical Properties

Yellow flammable liquid; insoluble in water; soluble in chloroform and benzene; immiscible with ethanol and ethyl ether.

Application

Used for the intermediates of dyes and pesticides, and also for the production of coatings, plastics and pharmaceuticals. O-nitrotoluene is mainly used in the production of o-toluidine, o-tolidine, and also used as the important raw materials of dyes, paints, plastics and pharmaceutical. In the pharmaceutical industry, it is used for the production of nifedipine, tegretol, imipramine hydrochloride, bromide has hydrochloride amine and sodium dicloxaeillin.I can also be used for dyes, pharmaceuticals, pesticides, plastics and other industries.

Production method

Nitrify toluene with mixed acid to generate mixed nitrotoluene, which mainly consists of o-nitrotoluene (about two-thirds) and p-nitrotoluene (about one-third). The mixed nitrotoluene can be separated to get the pure product. Add toluene to the reactor and cool to below 25℃. Then add the mixed acid (ie, 25-30% of nitric acid, 55-58% of sulfuric acid and 20-21% of water) and control the temperature not exceeding 50℃. Stir for 1-2h, and then stand for 6h. Separate the generated nitrotoluene, and wash them with water and alkali liquor to remove unreacted toluene and aliphatic compound. The crude nitrotoluene products consist of 55-60% of o-nitrotoluene, 2-5% of m-nitrotoluene and 35-40% of p-nitrotoluene, with a yield of 90-95%. The various isomers can be separated by crude distillation and crystallization according to the difference of the boiling point and melting point. Namely, first distill the crude nitrotoluene under vacuum to separate out the majority of o-nitrotoluene. And then the residual fraction containing more p-nitrotoluene is separated by vacuum distillation, and cooled for crystallization and separated to obtain the finished products. The tarry substance with high boiling point remains in the still. M-nitrotoluene remains in the mother liquor separated out the p-nitrotoluene, and can be obtained by rectification after repeated accumulation. The purity of ortho and para nitrotoluene can respectively reach 98% and 99%. The domestic process is the two-pot series process, and the reaction temperature of the main pot is 40-45℃ and the second pot is 50-55℃. The preparation of mixed acid is roughly similar, including 26-28% of nitric acid, 56-57% of sulfuric acid and 16-18% of water. The raw material consumption quota: toluene (98%) 800kg/t, nitric acid (98%) 470kg/t, sulfuric acid (92.5%) 450kg/t, caustic soda (42%) 100kg /t

Category

Toxic substance

Toxicity classification

moderate toxicity

Acute toxicity

Oral-Rat LD50: 891 mg/kg; Oral-mouse LD50: 970 mg/kg

Explosives hazardous characteristics

Explore when mixing with air; explore itself when meeting heat

Flammability Hazardous properties

Combust when meeting open fire; Combustion produces toxic nitrogen oxide fumes.

Storage and transportation characteristics

Stored in the low-temperature, well-ventilated and dry warehouse and stored separately with oxidants and food additives.

Fire extinguishing agent

mist water, foam, carbon dioxide

Occupational Standard

TWA 28 mg/m3; STEL 58 mg/m3

Chemical Properties

light yellow to darker yellow-green liquid

Uses

2-Nitrotoluene may be employed as nitrogen supplement in the culture medium of Pseudomonas sp. strain ClS1. It may be employed as carbon and energy supplement in the culture medium of Pseudomonas sp. strain JS42

Definition

ChEBI: A mononitrotoluene that is toluene carrying a nitro substituent at position 2.

General Description

Light yellow oily liquid with a characteristic odor of aromatic nitro compounds. Sinks in water. Derived from toluene by nitration and separation by fractional distillation. Flash point 223°F.

Air & Water Reactions

Insoluble in water.

Reactivity Profile

2-Nitrotoluene is toxic by inhalation, ingestion and skin aborption, targeting the blood, central nervous system, skin, and gastrointestinal tract. Symptoms include, anoxia, weakness or dizziness, nausea and vomiting. If 2-Nitrotoluene contacts the eye, the eye should be irrigated immediately. If 2-Nitrotoluene contacts the skin, the area should be washed with soap. If inhaled, respiratory support should be administered. Finally, if ingested, medical attention should be sought. 2-Nitrotoluene also reacts with sulfuric acid, sodium hydroxide, hydrogen, sodium, tetranitromethane, reducing agents and strong oxidizers. 2-Nitrotoluene is very heat sensitive.

Health Hazard

INHALATION, INGESTION, OR SKIN: Headache, flushing of face, dizziness, dyspnea (difficult breathing), cyanosis, nausea, vomiting, muscular weakness, increased pulse and respiratory rate, irritability, and convulsions. SKIN: Irritation.

2-Nitrotoluene Preparation Products And Raw materials

Raw materials

Preparation Products


2-Nitrotoluene Suppliers

Global( 156)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Mainchem Co., Ltd.
+86-0592-6210733
+86-0592-6210733 sales@mainchem.com CHINA 32766 55
Creasyn Finechem(Tianjin) Co., Ltd. 86-22-83945878,83945171,83945172
4008266163-06019 export@creasyn.com sale@creasyn.com China 916 68
J & K SCIENTIFIC LTD. 400-666-7788 +86-10-82848833
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Meryer (Shanghai) Chemical Technology Co., Ltd. +86-(0)21-61259100(Shanghai) +86-(0)755-86170099(ShenZhen) +86-(0)10-62670440(Beijing)
+86-(0)21-61259102(Shanghai) +86-(0)755-86170066(ShenZhen) +86-(0)10-88580358(Beijing) sh@meryer.com China 40400 62
3B Pharmachem (Wuhan) International Co.,Ltd. 86-21-50328103 * 801、802、803、804 Mobile:18930552037
86-21-50328109 3bsc@sina.com China 15940 69
Alfa Aesar 400-610-6006; 021-67582000
021-67582001/03/05 saleschina@alfa-asia.com China 30309 84
TCI (Shanghai) Development Co., Ltd. 800-988-0390
021-67121385 sales@tcishanghai.com.cn China 22909 81
BeiJing Hwrk Chemicals Limted 4006990298;010-57411839;0757-86311057;021-51691807
010-87653215;0757-86311057;021-55236763 sales@hwrkchemical.com China 14687 55
Energy Chemical 021-58432009 / 400-005-6266
021-58436166-800 info@energy-chemical.com China 44193 61
Beijing Ouhe Technology Co., Ltd +86-10-4006331231;+86-10-51280831;+86-10-82967028
+86-10-82967029 sales@ouhechem.com China 12615 60

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