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Aniline

CAS No.: 62-53-3
Molecular Formula: C6H7N
Molecular weight: 93.13

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product description

Aniline is the easiest important fragrant amine and a compound shaped via the substitution of a hydrogen atom in the benzene molecule with an amino group. It is colorless oil like flammable liquid with robust odor. When heated to 370 C, it is barely soluble in water and soluble in ethanol, ether, chloroform and different natural solvents. It will become brown in the air or below the sun. It can be distilled by way of steam. A small quantity of zinc powder is brought to stop oxidation when it is distilled. The purified aniline can be brought 10 ~ 15ppm NaBH4 to stop oxidation deterioration. The answer of aniline is alkaline.

It is convenient to produce salt when it reacts with acid. The hydrogen atoms on its amino organizations can be substituted with the aid of alkyl or acyl corporations to produce 2nd or 1/3 grade aniline and acyl aniline. When substitution response occurs, the merchandise of ortho and para substituted merchandise are primarily produced. It reacts with nitrite to structure diazonium salts, which can be used to produce a sequence of benzene derivatives and azo compounds.

Chemical Properties

Property	Value
Melting point	-6 °C (lit.)
Boiling point	184 °C (lit.)
Density	1.022 g/mL at 25 °C (lit.)
Vapor density	3.22 (185 °C, vs air)
Vapor pressure	0.7 mm Hg ( 25 °C)
Refractive index	n20/D 1.586(lit.)
Fp	76 °C
Storage temp.	2-8°C
Solubility	Water: soluble
Form	Liquid
Pka	4.63(at 25℃)
Color	APHA: ≤250
Specific Gravity	1.021
Odor	Sweet, amine-like odor detectable at 0.6 to 10 ppm
Relative polarity	0.42
PH	8.8 (36g/l, H2O, 20℃)
PH Range	8.1
explosive limit	1.2-11%(V)
Water Solubility	36 g/L (20 ºC)
Merck	14,659
BRN	605631
Henry's Law Constant	1.91 at 25 °C (thermodynamic method-GC/UV spectrophotometry, Altschuh et al., 1999)
Exposure limits	TLV-TWA skin 2 ppm (～8 mg/m3) (ACGIH), 5 ppm (～19 mg/m3) (MSHA, OSHA, and NIOSH); IDLH 100 ppm (NIOSH).
Dielectric constant	7.8（0℃）
Stability:	Stable. Incompatible with oxidizing agents, bases, acids, iron and iron salts, zinc, aluminium. Light sensitive. Combustible.
LogP	0.900
CAS DataBase Reference	62-53-3(CAS DataBase Reference)
IARC	2A (Vol. 27, Sup 7, 127)
NIST Chemistry Reference	Aniline(62-53-3)
EPA Substance Registry System	Aniline (62-53-3)

Safety Information

Property	Value
Hazard Codes	T,N,F
Risk Statements	23/ 24/ 25-40-41-43-48/ 23/ 24/ 25-50-68-48/ 20/ 21/ 22-39/ 23/ 24/ 25-11
Safety Statements	26-27-36/37/39-45-46-61-63-36/37-16
RIDADR	UN 1547 6.1/PG 2
OEL	TWA: None ppm
WGK Germany	2
RTECS	BW6650000
F	8-9
Autoignition Temperature	615 °C
TSCA	Yes
HS Code	2921 41 00
HazardClass	6.1
PackingGroup	II
Hazardous Substances Data	62-53-3(Hazardous Substances Data)
Toxicity	LD50 orally in rats: 0.44 g/kg (Jacobson)
IDLA	100 ppm

Product Usage

Aniline is a fundamental organic base and one of the most important intermediates in the chemical industry. Its most prominent application is in the production of MDI (Methylene diphenyl diisocyanate), a key component for polyurethane foams used in insulation and automotive seating. In the dye and pigment industry, aniline is the essential precursor for synthesizing indigo and various azo dyes for textiles and leather. Additionally, it plays a vital role in the rubber industry as an antioxidant and vulcanization accelerator. It is also a critical building block in the pharmaceutical sector for manufacturing sulfa drugs and analgesics, as well as in the production of herbicides for agriculture.

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