Search results
Results from the WOW.Com Content Network
Nitrobenzene is an aromatic nitro compound and the simplest of the nitrobenzenes, with the chemical formula C 6 H 5 NO 2. It is a water-insoluble pale yellow oil with an almond -like odor. It freezes to give greenish-yellow crystals.
The International Statistical Classification of Diseases and Related Health Problems (ICD), maintained by the World Health Organization, is a medical coding system used for medical billing and statistical purposes – not for deciding whether any person is sick, or whether any collection of symptoms constitutes a single disease. However, this ...
The Occupational Safety and Health Administration has set a permissible exposure limit at 10 ppm (50 mg/m 3) over an eight-hour time-weighted average. The National Institute for Occupational Safety and Health has set a recommended exposure limit at 10 ppm (50 mg/m 3 ) over an eight-hour time-weighted average, as well as a short-term exposure ...
Benzidine is prepared in a two step process from nitrobenzene. First, the nitrobenzene is converted to 1,2-diphenylhydrazine , usually using iron powder as the reducing agent. Treatment of this hydrazine with mineral acids induces a rearrangement reaction to 4,4'-benzidine.
If the benzene ring contains other substituents, it belongs in Category:Nitrobenzene derivatives Wikimedia Commons has media related to Nitrobenzenes . The main article for this category is Nitrobenzenes .
Health concerns and safety precautions [ edit ] The primary hazard of working with 2,4,6-trinitrobenzenesulfonic acid is the risk of instantaneous explosion. 2,4,6-Trinitrobenzenesulfonic acid is an extremely sensitive compound especially when mixed with other compounds, exposed to heat, or exposed to rapid temperature or pressure changes.
PCNB is prepared by chlorination of nitrobenzene at 60–70 °C in chlorosulfuric acid, with iodine as a catalyst. It can also be produced by the nitration of chlorinated benzenes. A side product of the synthesis of PCNB is hexachlorobenzene (HCB), which is considered as hazardous as PCNB. [1] 5 Cl 2 + C 6 H 5 NO 2 → C 6 Cl 5 NO 2 + 5 HCl
Chronic solvent-induced encephalopathy (CSE) is a condition induced by long-term exposure to organic solvents, often—but not always—in the workplace, that lead to a wide variety of persisting sensorimotor polyneuropathies and neurobehavioral deficits even after solvent exposure has been removed.