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PY2 [5] PY3 Hansa Yellow Light or Lemon Yellow [6] PY4 [7] PY5 [8] PY6 [9] PY10 [10] PY60 [11] PY65 Hansa Yellow Deep or Indian Yellow [12] PY74 Hansa Yellow Medium or Primary Yellow [13] PY82 [14] PY97 Hansa Yellow Medium or Hansa Yellow Deep [15]
The process was first presented in 1887 in Chemische Berichte, the journal of the German Chemical Society. [6] Although the structure proposed by Ziegler was not confirmed, he was able to develop an alternative synthesis of tartrazine based on the idea that a hydrazone is the tautomeric form of an azo compound (azo-hydrazo tautomerism). This ...
A Polycyclic aromatic hydrocarbon (PAH) is a class of organic compounds that is composed of multiple aromatic rings.Most are produced by the incomplete combustion of organic matter— by engine exhaust fumes, tobacco, incinerators, in roasted meats and cereals, [1] or when biomass burns at lower temperatures as in forest fires.
The general formula of a phosphoric acid is H n+2−2x P n O 3n+1−x, where n is the number of phosphorus atoms and x is the number of fundamental cycles in the molecule's structure, between 0 and n + 2 / 2 . Pyrophosphate anion. Trimethyl orthophosphate.
Phenyltropanes (PTs) are a family of chemical compounds originally derived from structural modification of cocaine.The main feature differentiating phenyltropanes from cocaine is that they lack the ester functionality at the 3-position terminating in the benzene; and thusly the phenyl is attached direct to the tropane skeleton with no further spacer (therefore the name "phenyl"-tropane) that ...
In CDCl 3, it has chemical shifts at 6.68 (H2, H5) and 6.22 (H3, H4). Pyrrole is an extremely weak base for an amine, with a conjugate acid p K a of −3.8. The most thermodynamically stable pyrrolium cation (C 4 H 6 N + ) is formed by protonation at the 2 position.
During LbL deposition, a suitable growth substrate (usually charged) is dipped back and forth between dilute baths of positively and negatively charged polyelectrolyte solutions. During each dip, a small amount of polyelectrolyte is adsorbed, and the surface charge is reversed, allowing the gradual and controlled build-up of electrostatically ...
Benzo[a]pyrene (BaP or B[a]P) is a polycyclic aromatic hydrocarbon and the result of incomplete combustion of organic matter at temperatures between 300 °C (572 °F) and 600 °C (1,112 °F). The ubiquitous compound can be found in coal tar, tobacco smoke and many foods, especially grilled meats.