Uses Chemical properties Uses Production method
ChemicalBook > CAS DataBase List > 2-Naphthylamine

2-Naphthylamine

Uses Chemical properties Uses Production method
Product Name
2-Naphthylamine
CAS No.
91-59-8
Chemical Name
2-Naphthylamine
Synonyms
bna[qr];usafcb-22;USAF CB-22;c.i. 37270;ci37270[qr];2-Naftylamin;AKOS AUF0416;usafcb-22[qr];2-Naftylamine;2-Naphtylamine
CBNumber
CB1455553
Molecular Formula
C10H9N
Formula Weight
143.19
MOL File
91-59-8.mol
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2-Naphthylamine Property

Melting point:
111-113 °C(lit.)
Boiling point:
306 °C(lit.)
Density 
1.061 g/mL at 25 °C(lit.)
vapor pressure 
2.56 x 10-4 mmHg at 20–30 °C (quoted, Mercer et al., 1990)
refractive index 
1.5000 (estimate)
storage temp. 
-20°C Freezer
solubility 
Solubility Soluble in hot water, ethanol, ether
pka
4.16(at 25℃)
form 
powder
color 
pink to purple
PH Range
Non& uorescence (2.8) to violet & uorescence (4.4)
Water Solubility 
<0.1 g/100 mL at 22 ºC
Merck 
13,6425
BRN 
3939429
Henry's Law Constant
2.01 x 10-9 atm?m3/mol at 25 °C (quoted, Mercer et al., 1990)
Exposure limits
Since it is a carcinogen, there is no TLV TWA for this compound. Recognized Carcinogen (ACGIH); Carcinogen (OSHA); Human Sufficient Evidence (IARC).
Stability:
Stable. Incompatible with strong oxidizing agents.
Major Application
Microelectronics, power transmission & fluid, insulators for electronic devices, photoresists, display device, imaging process, semiconductors, diesel fuel additives, battery, adhesive, paints, inks, chalk, leather, textiles, dye synthesis, soil products
InChIKey
JBIJLHTVPXGSAM-UHFFFAOYSA-N
CAS DataBase Reference
91-59-8(CAS DataBase Reference)
NIST Chemistry Reference
2-Naphthalenamine(91-59-8)
IARC
1 (Vol. 4, Sup 7, 99, 100F) 2012
EPA Substance Registry System
2-Naphthalenamine (91-59-8)
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Safety

Hazard Codes 
T,N
Risk Statements 
45-22-51/53
Safety Statements 
53-45-61
RIDADR 
UN 1650 6.1/PG 2
WGK Germany 
3
RTECS 
QM2100000
HazardClass 
6.1(a)
PackingGroup 
II
HS Code 
29214500
Hazardous Substances Data
91-59-8(Hazardous Substances Data)
Toxicity
LD50 (intraperitoneal) for mice 200 mg/kg (quoted, RTECS, 1985).
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Danger
Hazard statements

H302Harmful if swallowed

H350May cause cancer

H411Toxic to aquatic life with long lasting effects

Precautionary statements

P201Obtain special instructions before use.

P273Avoid release to the environment.

P391Collect spillage. Hazardous to the aquatic environment

P308+P313IF exposed or concerned: Get medical advice/attention.

P501Dispose of contents/container to..…

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
31618
Product name
2-Naphthylamine
Purity
analytical standard
Packaging
100mg
Price
$52.3
Updated
2020/08/18
Sigma-Aldrich
Product number
N8381
Product name
2-Naphthylamine
Purity
powder
Packaging
1g
Price
$111
Updated
2020/08/18
Sigma-Aldrich
Product number
N8381
Product name
2-Naphthylamine
Purity
powder
Packaging
500mg
Price
$66.3
Updated
2020/08/18
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2-Naphthylamine Chemical Properties,Usage,Production

Uses

Formerly used in the manufacture of dyes and antioxidants; rarely used for industrial research purposes today.

Chemical properties

2-Naphthylamine is also known as β-Naphthylamine, it is white to pink shiny flaky crystal, it is volatile with water vapor. It is harmful, carcinogenic, the International Institute for Cancer Research (IARC) put benzidine, 2-Naphthylamine and 4-aminobiphenyl as a human carcinogen (evidence), we should be particularly careful. The relative density is 1.0614 (98/4℃), m.p. is 111~113℃, boiling point is 306℃. It is insoluble in water, but soluble in hot water, ethanol, ether and benzene etc. Aqueous solution is blue fluorescence. It can be reducted by heat silver nitrate ammonia solution. It is synthesized by 2-naphthol with ammonia and ammonium sulfite in a high pressure system. 2-Naphthylamine is an important dye intermediates, can be used in the manufacture of dyes, phthalocyanine dyes, reactive dyes (Reactive brilliant orange K-7R, active golden XG, active golden KM-G, Reactive Yellow KM-RN, big red group B) and J acid. It can also be used as organic analytical reagents and fluorescent indicator, and also as a synthesis of organic materials.
It can enter from the respiratory tract, gastrointestinal tract and skin. Long-term exposure β-Naphthylamine can cause bladder cancer. It can cause weak stimulation of the skin, contact dermatitis, and methemoglobinemia. After the diagnosis of bladder cancer should be early surgery. Prevention should be carried out from the reform process firstly, 1-naphthylamine acetic acid should be used in place of β-Naphthylamine. Production equipment should be tightly closed to prevent the escape of toxic vapors and dusts.

structure of 2-naphthylamine

Uses

Amino and nitrite of Aminonaphthalene can form diazonium salt, and can turn into a variety of hydrocarbon derivatives of naphthalene, it can be used in the manufacture of dyes and organic synthesis, also used as indicators of organic analytical reagents and fluorescent agents.

Production method

Since the nitration of naphthalene can not obtain 2-nitro-naphthalene, so the producing methods is different from 1-Naphthylamine. 2-Naphthylamine is derived by 2-naphthol pressurized ammonia solution.

Chemical Properties

2-Naphthylamine is a white to red crystals with a faint, aromatic odor. Darkens in air to a reddish-purple color.

Physical properties

White crystals becomes purplish-red on exposure to air. Odor threshold concentrations ranged from 1.4 to 1.9 mg/m3 (quoted, Keith and Walters, 1992).

Uses

It is listed as a known human carcinogen. Used in manufacturing of dyes, as antioxidant in rubber

Uses

An amine compound used for research purposes

Uses

2-Naphthylamine was widely used in themanufacture of dyes and in rubber. Currently, its use is curtailed because of thehealth hazard.

Production Methods

2-Naphthylamine was previously produced in substantial amounts for nearly 50 years but is no longer produced commercially. It is now used exclusively for research, and only rarely. It was formerly used in the manufacture of dyestuffs and as an antioxidant in the rubber industry.
Prior to termination of its domestic production and use in the dye and rubber industries, an estimated 1000 U.S. workers were possibly exposed to 2-naphthylamine by inhalation and dermal routes. Currently, laboratory technicians and scientists who use the compound for research purposes may constitute the group with the greatest risk of potential exposure.

Definition

ChEBI: A naphthylamine carrying the amino group at position 2.

Synthesis Reference(s)

Journal of the American Chemical Society, 75, p. 2014, 1953 DOI: 10.1021/ja01104a525
Synthesis, p. 830, 1980 DOI: 10.1055/s-1980-29225

General Description

A white to reddish colored solid in the form of flakes. Slightly soluble in hot water and denser than water. Toxic by ingestion, inhalation and skin absorption. Used to make dyes and agricultural chemicals.

Air & Water Reactions

2-Naphthylamine darkens in air to a reddish-purple color (oxidizes). Slightly soluble in hot water and denser than water. Napthyl amines can be slowly hydrolyzed, releasing NH3 as a byproduct [N.L. Drake, Org. React. 1, (1942), 105].

Reactivity Profile

2-Naphthylamine is a weak base. 2-Naphthylamine is incompatible with strong oxidizing agents and strong acids. 2-Naphthylamine is also incompatible with nitrous acid. 2-Naphthylamine reduces warm ammoniacal silver nitrate.

Hazard

Toxic by ingestion, inhalation, skin absorption; a confirmed carcinogen. Causes bladder cancer.

Health Hazard

2-Naphthylamine poses a severe health haz ard because of its carcinogenicity. Admin istration of this compound by all routesresulted in cancers in various tissues in testanimals. It caused tumors in the kidney, blad der, liver, lungs, skin, and blood tissues.There is sufficient evidence that this com pound causes bladder cancer in humans aftera latent period of several years.The toxicity of 2-naphthylamine is lowto moderate. However, high doses can pro duce severe acute toxic effects. The routesof exposures are ingestion, skin contact, andinhalation of its dusts or vapors. The acutetoxic symptoms are similar to those produced by 1-naphthylamine: hemorrhagic cystitis or methemoglobinemia (causing hypoxiaor inadequate supply of oxygen to tissues),respiratory distress, and hematuria (blood inurine).LD50 value, oral (rats): 727 mg/kg.

Fire Hazard

Combustible material: may burn but does not ignite readily. When heated, vapors may form explosive mixtures with air: indoors, outdoors and sewers explosion hazards. Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated. Runoff may pollute waterways. Substance may be transported in a molten form.

Safety Profile

Confirmed human carcinogen with experimental neoplastigenic and tumorigenic data. Long and continued exposure to even small amounts may produce tumors and cancers of the bladder. Poison by intraperitoneal route. Moderately toxic by ingestion. Experimental reproductive effects. Human mutation data reported. A very toxic chemical in any of its physical forms, such as flake, lump, dust, liquid, or vapor. It can be absorbed into the body through the lungs, the gastrointestinal tract, or the skin. Combustible when exposed to heat or flame. At elevated temperatures it evolves a vapor that is flammable and explosive. Incompatible with nitrous acid. When heated to decomposition it emits toxic fumes of NOx.

Potential Exposure

2-Naphthylamine is presently used only for research purposes. It is present as an impurity in α-naphthylamine. It is as an intermediate in the preparation of other compounds. 2-Naphthylamine was widely used in the manufacture of dyestuffs; as an antioxidant for rubber; and in rubber coated cables.

Carcinogenicity

2-Naphthylamine is known to be a human carcinogen based on sufficient evidence of carcinogenicity from studies in humans.

Environmental Fate

Photolytic. Low et al. (1991) reported that the photooxidation of aqueous primary amine solutions by UV light in the presence of titanium dioxide resulted in the formation of ammonium and nitrate ions.
Chemical/Physical. Kanno et al. (1982) studied the aqueous reaction of 2-naphthylamine and other substituted aromatic hydrocarbons (aniline, toluidine, 1-naphthylamine, phenol, cresol, pyrocatechol, resorcinol, hydroquinone, and 1-naphthol) with hypochlorous acid in the presence of ammonium ion. They reported that the aromatic ring was not chlorinated as expected but was cleaved by chloramine forming cyanogen chloride. At lower pHs, the amount of cyanogen chloride formed increased (Kanno et al., 1982).
2-Naphthylamine will not hydrolyze because it does not contain a hydrolyzable functional group (Kollig, 1993).
At influent concentrations of 10, 1.0, 0.1, and 0.01 mg/L, the GAC adsorption capacities were 300, 150, 75, and 37 mg/g, respectively (Dobbs and Cohen, 1980).

Shipping

UN1650 β-Naphthylamine, Hazard Class: 6.1; Labels: 6.1-Poisonous materials.

Purification Methods

Sublime the amine at 180o in a stream of nitrogen. Crystallise it from hot water (charcoal) or *benzene. Dry it under vacuum in a drying pistol. The styphnate has m 194-195o (from EtOH). [Beilstein 12 H 1265, 12 III 2989, 12 IV 3122.] CARCINOGEN.

Incompatibilities

A weak base. Dust may form explosive mixture with air. Incompatible with oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, fluorine, etc.); contact may cause fires or explosions. Keep away from alkaline materials, strong bases, strong acids, oxoacids, epoxides. Incompatible with nitrous acid.

Waste Disposal

Controlled incineration whereby oxides of nitrogen are removed from the effluent gas by scrubber, catalyst, or thermal device. Consult with environmental regulatory agencies for guidance on acceptable disposal practices. Generators of waste containing this contaminant (≥100 kg/mo) must conform with EPA regulations governing storage, transportation, treatment, and waste disposal.

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2-Naphthylamine Suppliers

TianJin Alta Scientific Co., Ltd.
Tel
+86-022-6537-8550
Fax
+86-022-2532-9655
Email
contact@altascientific.com
Country
China
ProdList
2775
Advantage
58
Jinan SenNuowo Pharmaceutical Technology Co., Ltd.
Tel
0531-88807395
Fax
0531-82777287
Email
xuandechem@163.com
Country
China
ProdList
90
Advantage
55
Linyi Azelasi Biological Co., Ltd.
Fax
0539-6222546
Email
2805221329@qq.com;
Country
China
ProdList
1474
Advantage
58
Tianjin Kangkede Technology Co., Ltd.
Tel
18785034686
Email
3512023833@qq.com
Country
CHINA
ProdList
10
Advantage
58
Guangzhou Helong Trading Co., Ltd.
Tel
18676882001
Email
1162637465@qq.com
Country
CHINA
ProdList
10
Advantage
58
Wuhan EnTai Technology Development Co,.Ltd
Tel
86-27-82330560
Fax
86-27-82330547
Email
2536851935@qq.com
Country
China
ProdList
351
Advantage
69
J & K SCIENTIFIC LTD.
Tel
010-82848833- ;010-82848833-
Fax
86-10-82849933
Email
jkinfo@jkchemical.com;market6@jkchemical.com
Country
China
ProdList
96815
Advantage
76
3B Pharmachem (Wuhan) International Co.,Ltd.
Tel
821-50328103-801
Fax
86-21-50328109
Email
3bsc@sina.com
Country
China
ProdList
15880
Advantage
69
Beijing dtftchem Technology Co., Ltd.
Tel
13651141086; 86(10)60275028、60275820
Fax
86 (10) 60270825
Email
dtftchem@sina.com
Country
China
ProdList
3393
Advantage
62
Beijing Ouhe Technology Co., Ltd
Tel
010-82967028-
Fax
+86-10-82967029
Email
2355560935@qq.com
Country
China
ProdList
12284
Advantage
60
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View Lastest Price from 2-Naphthylamine manufacturers

Anhui Rencheng Technology Co., Ltd
Product
Naphthalen-2-amine 91-59-8
Price
US $1.00-90.00/KG
Min. Order
0.5KG
Purity
>99%
Supply Ability
20tons
Release date
2021-01-05
Hebei Chisure Biotechnology Co.LTD
Product
2-naphthylamine 91-59-8
Price
US $100.00/KG
Min. Order
1KG
Purity
99
Supply Ability
5tons
Release date
2020-12-17
Hebei shuoxi biotechnology co. LTD
Product
Naphthalen-2-amine 91-59-8
Price
US $80.00/g
Min. Order
10g
Purity
99.8%
Supply Ability
10tons
Release date
2020-09-25

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