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uses of benzaldehyde - aldehydes and ketonesbenzaldehyde is useda in perfumeryd in manufacture of dyesc in preparation of benzoic acid cinnamic acid
lab animals in this section we shall deal with the important aspects concerning lab animals you are advised to be familiar with regulations
hazards in the laboratory laboratories in the biology department of schools colleges and universities and other higher level organisation such as
objectivesafter studying this unit you should be able to1 state the principal hazards of biology lab work2 describe the ways to minimize
introduction in any science lab you work with chemicals gases electrical equipments glassware instruments etc in case you are working in a biology
physical properties of benzaldehydea it is a colourless oily liquid the boiling point of it is 179 cb benzaldehyde has smell of bitter almondsc
stephen reaction - aldehydes and ketonesbenzaldehyde is acquired by partial reduction of phenyl cyanide along with stannous chloride and passing dry
let us summarise the important points that we have understood about the radiation and chemical hazards in this unit the radiations causing severe
lab hygiene the need for continuous attention to hygiene in any type of laboratory cannot be overemphasised any spillage of chemicals battery acid
personal sensitivity there are other dangers from substances which are not so common eg mutagens but one aspect we have not mentioned involves you
personal safety you would recall that there are mainly three routes through which the harmful substances can enter the human body these are direct
hygiene we all would agree that chemical hazards can be prevented to a certain extent by maintaining a good hygiene hygiene in this context can be
transfer from large containers as with all dangerous operations it will pay you to think what the worst possible accident may be that could result
transport of bulk chemicals ideally only sufficient concentrated acids flammable solvents and other hazardous chemicals should be kept in the
explosives as defined earlier explosives release a large amount of gas and energy in a very short time these are of four basic typesmixed gases -
poisons it is essential that all dangerous substances such as cyanides are always kept under strict control steps to ensure such control are as
storage of chemicals you have read about the stores as important structures of all the labs in previously storage of chemicals whether in small
tests for acetone - indigo test and iodoform testa indigo test when a small amount of orthonitrobenzaldehyde is added to approximately 2 ml of
tests for acetone - legal testa legals test while a few drops of prepared freshly sodium nitroprusside and sodium hydroxide solution are added or
handling of chemicals laboratory technicians who work in laboratories need to be aware of the potential danger of the substances they handle in the
uses of acetone - aldehydes and ketonesa it is used as a solvent for cellulose acetate cellulose nitrate celluloid lacquers resins etcb it is used
corrosive substances these substances cause severe damage by chemical action when in contact with living tissue or in case of leakage destroy damage
poisonous and infectious substances these are the substances liable to cause death or serious injuries to health if swallowed or inhaled or allowed
oxidising substances it includes oxidising substances and the organic peroxides oxidising substances are by themselves not combustible but by
flammable solids flammable solids are substances which are flammable or liable to spontaneous combustion or emit flammable gases on contact with