1. References

Pittacal was the first synthetic dyestuff to be produced commercially. It was accidentally discovered in 1832 by German chemist Carl Ludwig Reichenbach, who is also recognized as being the discoverer of kerosene, phenol, eupion, paraffin wax and creosote.

According to history, Reichenbach applied creosote to the wooden posts of his home, in order to drive away dogs who urinated on them. The strategy was ineffective, however, and he noted that the dog's urine reacted with creosote to form an intense dark blue deposit. He named the new substance píttacal (from Greek words tar and beautiful). He later succeeded in producing pure pittacal by treating beechwood tar with barium oxide and using alumina as a mordant to the dye's fabrics. Although sold commercially as a dyestuff, it did not fare well.

Eupittone (derived from eu- + pittacal + -one) is a yellow crystalline substance resembling aurin, and obtained by the oxidation of pittacal. It is also called also eupittonic acid or eupitton.

References

Kaufmann, GB - Pittacal—the first synthetic dyestuff. J. Chem. Edu., 753, 1977.

• University of New South Wales Faculty of Medicine
• University of New South Wales Regiment
• University of New York at Buffalo
• University of New York in Tirana
• University of Neyshabur
• University of Nigeria Nsukka
• University of Niigata Prefecture
• University of Nijmegen (1655–80)
• University of Nizamiya
• University Of Nizwa
• University of Nizwa
• University of Niš Faculty of Law
• University of Normal
• University of Northampton (thirteenth century)
• University of North Carolina academic-athletic scandal
• University of North Carolina academics-athletics scandal
• University of North Carolina - Asheville
• University of North Carolina at Chapel Hill football scandal
• University of North Carolina at Chapel Hill Library
• University of North Carolina at Chapel Hill School of Dentistry
• University of North Carolina at Chapel Hill School of Public Health
• University of North Carolina at Chapel Hill School of Social Work
• University of North Carolina at Chapel Hill SUV attack
• University Of North Carolina-Chapel Hill
• University of North Carolina Charlotte