Handling of substances/material

All processes except laboratory operations. A laboratory operation is defined as any work with substances m which the containers used for reactions, transfers and other handling of substances are designed to be easily manipulated by one person. This does not include operations whose function IS to produce commercial quantities of material. 

Organo-metallic compounds, on the other hand, behave very much like organic compounds, e.g. they can be redistilled and may be soluble in organic solvents. A note of caution should be made about handling organo-metallic compounds, e.g. arsines, because of their potential toxicities, particularly when they are volatile. Generally the suppliers of such compounds provide details about their safe manipulation. These should be read carefully and adhered to closely. If in any doubt always assume that the materials are lethal and treat them with utmost care. The same safety precautions about the handling of substances as stated in Chapter 4 should be followed here (see Chapter 1). 

Numbers 7 and 8 in Table 3.6 represent high hazard substances such as azides, peroxides, perchlorates, and nitro compounds. The handling of such materials requires extreme care and safety precautions. 

We have developed method for the quantitative determination of heroin, O -monoacetylmorphine, acetylcodeine, morphine, and codeine which is applicable to a wide variety of heroin samples. Since the relative proportion of these substances should remain unchanged during any additional handling of the material, this method enables one to compare seemingly unlike heroin samples. This information, coupled with other analytical information such as the physical appearance of the exhibit and the presence or absence of adulterants, provides a good basis on which to compare exhibits. 

Stressing the fundamental message that the handling of substances in everyday life is part of the broad domain of chemistry and, therefore, chemistry information is essential for proper handling, and green chemistry criteria apply to it. Recommendations concerning substances and materials (such as those written on their containers) are chemistry-based and, because of this, they need to be taken into account carefully, to ensure appropriate usage and appropriate disposal once they have finished their useful period. 

The handling of substances and materials has enormous impacts on the environment. We handle a lot of substances and materials household products products for the garden pesticides, fertilizers and weed-killers in agriculture medicines and many others. Too often, substances are not handled or disposed of according to recommendations, or the main utilisation criterion seems to be the more, the better . Some chemistry literacy is necessary to understand ... 

Two keys to the safe use and handling of hazardous materials are, first, to know what the substances are and, second, to know the characteristics of those substances. The Control of Substances Hazardous to Health Regulations 2002 (COSHH) require that data on each of the hazardous substances on the site should be kept and be available to operators at all times. A supporting Approved Code of Practice recommends that a list of all hazardous materials is also kept and made available. Hazardous substances are defined in COSHH as ... 

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