Aniline
CAS Number: 62-53-3
Chemical Formula: C6H7N
Synonyms: amino-benzen Aminophen
Appearance: Yellow Liquid
MOQ (Minimum Order Quantity): 1 FCL (Full Container Load)
Aniline is the most basic primary aromatic amine, formed by replacing one hydrogen atom on benzene with an amino group. It is a colorless, oily, flammable liquid with a strong characteristic odor. It boils at 184 °C, is slightly soluble in water, and dissolves readily in ethanol, ether, chloroform, and other organic solvents. It darkens upon exposure to air or sunlight. It can be steam-distilled; a small amount of zinc powder is usually added during distillation to prevent oxidation. Purified aniline may be stabilized with 10–15 ppm NaBH4 to avoid oxidative degradation. Aniline solution is weakly alkaline.
Chemical Properties
| Item | Specification |
| 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 |
| pka | 4.63(at 25℃) |
| form | Liquid |
| color | APHA: ≤250 |
| Specific Gravity | 1.021 |
| Relative polarity | 0.42 |
| Odor | Sweet, amine-like odor detectable at 0.6 to 10 ppm |
| 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) |
| Dielectric constant | 7.8（0℃） |
| Exposure limits | TLV-TWA skin 2 ppm (～8 mg/m3) (ACGIH), 5 ppm (～19 mg/m3) (MSHA, OSHA, and NIOSH); IDLH 100 ppm (NIOSH) |
| Stability | Stable. Incompatible with oxidizing agents, bases, acids, iron and iron salts, zinc, aluminium. Light sensitive. Combustible. |
| LogP | 0.900 |
| Surface tension | 47.9mN/m at 298.15K |
| 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
| Item | Specification |
| 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 Application
Aniline has long been a vital industrial chemical. Today, its largest uses are in the production of polyurethanes and rubber products. Smaller volumes go into making agricultural chemicals including herbicides, fungicides, insecticides, and animal repellents, as well as defoliants, dyes, antioxidants, antidegradants, and vulcanization accelerators. It is also used in household items such as stove and shoe polishes, paints, varnishes, and marking inks.
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