Bromine (Br2) [7726-95-6] is the only non-metallic element that is liquid at normal temperature and pressure.Its color is dark reddish-brown fuming liquid with a strong pungent smell.Its name is derived from the Greek (bromos), meaning 'stinky'.Bromine has two stable isotopes, 79Br and 81Br, which exist in almost equal proportions, so its atomic weight is 79.904.The atomic number of bromine is 35.Within fairly broad limits, both liquid bromine and bromine vapor are diatomic molecules (Br2).Exposure to bromine, either by liquid contact or by inhalation of vapour, can cause injury, even serious injury.The fluid quickly erodes the skin and other tissues, producing irritation, burning, and gangrene.Low concentration vapor is irritating to eyes and respiratory tract.Exposure to dangerous concentrations can cause injurious inflammation and puffiness, which can lead to pneumonia.Excessive exposure to low concentrations may also cause eye and
P-thiamphenyltoluene is an organic compound with the molecular formula C8H10O2S.White powder or granular crystal, insoluble in water, soluble in alcohol, ether and other organic solvents, not classified as dangerous goods, it is medicine, dyestuff, veterinary drug and organic synthesis intermediate.[3] Chinese name p-methylsulfonyltoluene Foreign name 1-methyl-4-methylsulfonylbenzene Chemical formula C8H10O2S Molecular weight 170.23 CAS registration number 3185-99-7EINECS registration number 221-682-8 Melting point 85 ℃ Boiling point 311.7 ℃ Density 1.154 g/cm³Appearance White powder or granular crystal flash point 173.4 ℃ Uses: medicine, dyestuff, veterinary medicine and organic synthesis intermediates; used as pharmaceutical intermediates.