By Dr. Marcel Castegnaro, Dr. Eric B. Sansone (auth.)
"The chemical laboratory is basically no longer a deadly position to paintings in, however it calls for an inexpensive prudence at the a part of the experimenters and instructers, to maintain it a secure position. Emphasis needs to be optimistic, indicating the right kind, right and secure process to be in all laboratory operations or while confron ted with an emergency scenario. Too heavy rigidity upon the horrors linked to laboratory injuries or picture descriptions of gory accidents or nasty fires may be shunned. worried, timid scholars usually tend to have injuries than the convinced laboratory guy who works with due regard to safeguard. " This assertion, written by way of 1. R. younger (1) in 1971, within the magazine of Chemical schooling, applies not just to scholars operating within the chemical laboratory yet should be prolonged to all scientists and technicians operating with unsafe items, and particularly with chemical cancer causing agents. the risks of dealing with poisonous or harmful chem icals were good documented. in addition to safeguard notices and articles within the medical literature, plenty of books were devoted to this topic, between which might be mentioned defense and twist of fate Prevention in Chemical Operations (2), instruction manual of Laboratory security (3), risks within the Chemical Laboratory (4), 1 instruction manual of Reactive Chemical dangers (5), defense in operating with chemical substances (6) and Prudent Practices for dealing with detrimental chemical substances in Laboratories (7).
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Extra info for Chemical Carcinogens: Some Guidelines for Handling and Disposal in the Laboratory
Ii) Method using hypochlorites: Sodium and calcium hypochlorites were proposed by two groups for the treatment of spills and solutions contaminated with hydrazine (168) or spills and equipment contaminated with 1,1-dimethylhydrazine (169). The method was therefore reinvestigated for degradation of these two compounds and of methylhydrazine, 1,2-dimethylhydrazine and procarbazine. Although stoichiometric quantities were found to be sufficient to degrade the compounds in less than half an hour, a four-times excess and a 12-hour reaction time were necessary to obtain nonmutagenic residues with the S.
Carcinogenic substances should be treated in such a way that: • the degradation products are non-toxic and non. carCInogemc; • the procedures involved for treatment and disposal do not result in exposure to these substances of personnel in charge of the work; and • the procedures involved for treatment and disposal do not result in contamination of equipment or space. Two main categories of waste can be envisaged: • large volumes of lightly contaminated wastes, such as bedding from animal experiments, carcasses and disposable protective clothing not obviously contaminated; and • small volumes of more highly contaminated wastes, such as residues of chemical synthesis and of solutions used in biochemical or biological laboratories.
The minimal protective clothing to be worn in a chemical or biochemical laboratory is a fully fastened, long laboratory coat. As described by Barbeito (78), this could be replaced by a fully buttoned laboratory coat, wrap-around smock, solid front gown, one-piece laboratory suit, heavy-duty overall or two-piece laboratory suit. For personnel working with laboratory animals, completely closed jump-suits are preferable; in addition, such staff should be provided with shoes or boots, head cover and gloves.