We should avoid using ,as it is poisonous and does not destroy easily
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Armed with some basic facts about toxic substances, you can reduce your exposure to chemicals and lower the chance of harmful health effects.
The old saying, "what you don't know can't hurt you," isn't always good advice. When it comes to toxic substances, WHAT YOU KNOW CAN HELP YOU. Radon in basements, lead in drinking water, exhausts from cars and chemicals released from landfills are just a few examples of toxic substances that can hurt you. By understanding how, you can reduce your exposure to chemicals and reduce your risk of harmful health effects.
What is a toxic substance?
A toxic substance is a substance that can be poisonous or cause health effects. People are generally concerned about chemicals like polychlorinated biphenyls (PCBs) and dioxin which can be found at some hazardous waste sites. Products that we use daily, such as household cleaners, prescription and over-the-counter drugs, gasoline, alcohol, pesticides, fuel oil and cosmetics, can also be toxic. Any chemical can be toxic or harmful under certain conditions.
Health effects: toxic or hazardous?
Chemicals can be toxic because they can harm us when they enter or contact the body. Exposure to a toxic substance such as gasoline can affect your health. Since drinking gasoline can cause burns, vomiting, diarrhea and, in very large amounts, drowsiness or death, it is toxic. Some chemicals are hazardous because of their physical properties: they can explode, burn or react easily with other chemicals. Since gasoline can burn and its vapors can explode, gasoline is also hazardous. A chemical can be toxic, or hazardous, or both.
How can toxic substances cause harm?
Since chemicals can be toxic, it is important to understand how they can affect health. To determine the risk of harmful health effects from a substance, you must first know how toxic the substance is; how much, and by what means, a person is exposed; and how sensitive that person is to the substance.
Toxicity
Some substances are more toxic than others. The toxicity of a substance is described by the types of effects it causes and its potency.
Types of Effects: Different chemicals cause different effects. For example, Chemical A may cause vomiting, but not cancer. Chemical B may have no noticeable effects during exposure, but may cause cancer years later.
Potency: Potency (strength) is a measure of a chemical's toxicity. A more potent chemical is more toxic. For example, sodium cyanide is more potent than sodium chloride (table salt) since swallowing a smaller amount of cyanide can poison you.
The potency and, therefore, the toxicity of a chemical can be affected by its breakdown within the human body. When a substance is absorbed into the body, its chemical structure may be changed or metabolized to a substance that is more toxic or less toxic. For example, carbon tetrachloride, once a commonly used solvent, is changed by the body into a more toxic chemical that causes liver damage. For some other chemicals, metabolism changes the chemical into a form that is more easily eliminated by the body.
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Here is the answer
Toxic ( Also called as toxins) is the answer