Frequently Asked Questions
What is Aniline?
Aniline, phenylamine or aminobenzene is an organic compound with the formula C6H5NH2. Consisting of a phenyl group attached to an amino group, aniline is the prototypical aromatic amine
What is another names for Aniline?
Aminobenzene, Benzenamine.
Who discovered Aniline?
Aniline was first isolated from the destructive distillation of indigo in 1826 by Otto Unverdorben, who named it crystalline. In 1834, Friedlieb Runge (Pogg. Ann., 1834, 31, p. 65; 32, p. 331) isolated from coal tar a substance that produced a beautiful blue colour on treatment with chloride of lime, which he named kyanol or cyanol. In 1841, C. J. Fritzsche showed that, by treating indigo with caustic potash, it yielded an oil, which he named aniline, from the specific name of one of the indigo-yielding plants, from Portuguese anil “the indigo shrub” from Arabic an-nil “the indigo” assimilated from al-nil, from Persian nila, from nili “indigo” with Indigofera anil, anil being derived from the Sanskrit नीली nīla, dark-blue, and nīlā, the indigo plant. About the same time N. N. Zinin found that, on reducing nitrobenzene, a base was formed, which he named benzidam. August Wilhelm von Hofmann investigated these variously-prepared substances, and proved them to be identical (1855), and thenceforth they took their place as one body, under the name aniline or phenylamine.
What is Aniline used for?
The largest application of aniline is for the preparation of methylene diphenyl diisocyanate (MDI). The majority of aniline serves this market. Other uses include rubber processing chemicals (9%), herbicides (2%), and dyes and pigments (2%). As additives to rubber, aniline derivatives such as phenylenediamine and diphenylamine, are antioxidants. Illustrative of the drugs prepared from aniline is paracetamol (acetaminophen, Tylenol). The principal use of aniline in the dye industry is as a precursor to indigo, the blue of blue jeans. Aniline is also used at a smaller scale in the production of the inherently conducting polymer polyaniline
How Aniline is produced?
Aniline is mainly produced in industry in two steps from benzene. First, benzene is nitrated using a concentrated mixture of nitric acid and sulfuric acid at 50 to 60°C, which gives nitrobenzene. In the second step, the nitrobenzene is hydrogenated, typically at 200-300 °C in presence of various metal catalysts:
C6H5NO2 + 3 H2 → C6H5NH2 + 2 H2O
Originally, the reduction was effected with a mixture of ferrous chloride and iron metal via the Bechamp reduction.
As an alternative, aniline is also prepared from phenol and ammonia, the phenol being derived from the cumene process.
In commerce, three brands of aniline are distinguished: aniline oil for blue, which is pure anilines; aniline oil for red, a mixture of equimolecular quantities of aniline and ortho- and para-toluidines; and aniline oil for safranine, which contains aniline and ortho-toluidine, and is obtained from the distillate (échappés) of the fuchsine fusion.
Do you sell its Aniline products worldwide?
Yes, we have sell Aniline to worldwide.
What your size packing details for Aniline?
Our packing for Aniline was available at drum sealed packaging with net weight of 200 kg per barrel. For more information about Aniline packaging details, you can contact us.
Who should I contact for more information?,
For specific information or assistance about our product, please feel free to contact us by phone, fax or e-mail. If you are already an Aniline customer, please contact your sales representative.
