Miscellaneous dangerous substances , Science

Assignment Help:

Miscellaneous Dangerous Substances : This was introduced in the United Kingdom to identify other hazardous substances and consists of a black exclamation mark on a white background.

 1116_UN Hazard class symbols.png

 Charts showing UN Hazard class symbols on transportation of hazardous goods.

Besides the above recognised classes for hazardous chemicals, there is another very important class of compounds which you should be aware of. 'These are called carcinogens. These are the substances which cause cancer. There are a number of substances which are known to induce cancer many months or years after the initial exposure. Some substances which are known or suspected carcinogens are aniline, chloroform, benzyl chloride, chromates of lead and zinc, hydrazine etc. Ninhydrin - the reagent used in biological and biochemical tests for the presence of amino acids and proteins, is also thought to be a possible carcinogen, but this has yet to be confirmed. Similarly some stains like fusion used in biology lab also belong to this category and extreme care should be exercised in their use. The examples given here are very few, however more and more substances are being shown to be carcinogenic and the fact that even quite common substances may have some carcinogenic activity emphasizes the necessity of consulting reference literature before starting work with materials when you are ignorant of their potential hazards.

Before proceeding further you can try to answer the following question based on the nature of hazardous substances.


Related Discussions:- Miscellaneous dangerous substances

What is the meaning of manures, What is the meaning of Manures The way ...

What is the meaning of Manures The way fertilizers affect soil productivity, organic matters in soil are also associated with soil fertility.  This is because a soil rich in or

Drinking straw hydrometer, Drinking straw hydrometer Procure a drinking...

Drinking straw hydrometer Procure a drinking straw or a stout natural straw about 20 cm long. If it is not 'water-proof' dip it in melted candle wax and permit it to dry. Seal

Explain total lung volume or total lung capacity, Explain Total Lung Volume...

Explain Total Lung Volume or Total Lung Capacity Total Lung Volume (TLV) or Total Lung Capacity (TLC):  It is the volume of air remaining in the lungs after a maximal inspirati

Explain the term liming - decreasing soil acidity, Explain the term Liming ...

Explain the term Liming - Decreasing Soil Acidity Acid soils can be managed in two ways, viz. either by growing crops suitable for particular soil pH or by treating the soils w

Conservation of mineral resources, Conservation of mineral resources: M...

Conservation of mineral resources: Mineral reserves are present in a limited quantity and they can be exhausted. At  the present rate of consumption many of  them will not last

Conversion of oxaloacetate to phosphoenolpyruvate, Conversion  of  oxaloa...

Conversion  of  oxaloacetate to phosphoenolpyruvate Conversion  of  oxaloacetate to phosphoenolpyruvate:  In  this  reaction, oxaloacetate and guanosine triphosphate (GTP) are

Solid waste, Solid waste Solid waste in some cases can be a resource. A...

Solid waste Solid waste in some cases can be a resource. A good example is the factory at Yokohama in Japan which is engaged in converting waste paper into toilet paper. In our

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd