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

Define erythroblastosis fetalis, Define Erythroblastosis Fetalis Beside...

Define Erythroblastosis Fetalis Besides the risk of a mismatch reaction during a second or during any subsequent  blood transfusion, giving Rh-positive, blood involves  risk in

Life science, b) discuss briefly the scientific and technical achievements ...

b) discuss briefly the scientific and technical achievements of the bronze age

To show how soil is formed from rocks, To show how soil is formed from rock...

To show how soil is formed from rocks Carefully heat a piece of glass in a flame and then plunge it into cold water. The unexpected cooling of the glass causes it to contract u

Write a short note on ozone in the atmosphere, Question: a) How does te...

Question: a) How does temperature changes in the stratosphere? Give a physical explanation and illustrate your answer using a diagram. b) Write a short note on ozone in the

Explain the selective reabsorption process, Explain the Selective Reabsorpt...

Explain the Selective Reabsorption Process 1. Specialized proteins called 'transporters' are located on the membranes of the various cells of the nephron. 2. These transport

White lipped tree frog, how does reproduction help the white lipped tree fr...

how does reproduction help the white lipped tree frog survive

Explain the renal failure, Explain the Renal Failure It is the inabilit...

Explain the Renal Failure It is the inability of the kidneys to manufacture and excrete urine causing the waste products to accumulate in the blood plasma. If the kidneys do no

Catholic, What is the literal translation of the word catholic?

What is the literal translation of the word catholic?

Explain the direct and indirect effects of lime application, Explain the di...

Explain the direct and indirect effects of lime application The direct and indirect effects of lime application to acid soils generally are increased crop growth, although thei

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