Arsenic Compounds and Their Uses
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Arsenic Compounds and Their Uses

This quiz covers the properties and uses of arsenic compounds, including arsenious oxide and copper arsenite, in various industries such as agriculture, manufacturing, and more.

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Questions and Answers

In which tissue is arsenic present in the greatest quantity?


What is the typical appearance of stool in acute arsenic poisoning?

Rice-water like, colorless, and odorless

Which of the following symptoms is NOT typical of acute arsenic poisoning?


In what time frame do symptoms of acute arsenic poisoning typically appear?

<p>Within 1 hour</p> Signup and view all the answers

What is the primary use of arsenic trioxide?

<p>Insecticides and rat poisons</p> Signup and view all the answers

Which of the following is a natural source of arsenic?

<p>Some sea fish</p> Signup and view all the answers

Study Notes

Arsenic Compounds

  • Arsenious oxide (arsenic trioxide) is the most toxic form of arsenic, with no taste or smell, and is sparingly soluble in water.
  • It is used in fruit sprays, sheep-dips, weed-killers, insecticides, rat poisons, flypapers, calico-printing, wallpapers, and as a mordant in dyeing.

Copper Arsenite and Copper Acetoarsenite

  • Copper arsenite (Scheele's green) and copper acetoarsenite (Paris green or emerald green) are used as coloring agents in substances, including confectionary.

Arsenic Sulphide and Arsine

  • Arsenic sulphide is used as a depilatory, coloring pigment, and in flypaper.
  • Arsine is a colorless gas with a garlic-like odor.

Natural Sources of Arsenic

  • Arsenic can be found naturally in soil, water, and some sea fish (mussels, prawns).
  • High arsenic content in soil and subsoil water can cause endemic toxicity.

Action of Arsenic

  • Arsenic interferes with cellular respiration by uncoupling mitochondrial oxidative phosphorylation.
  • It combines with sulfhydryl groups of mitochondrial enzymes, inhibiting cellular glucose uptake, gluconeogenesis, fatty acid oxidation, and acetyl CoA production.
  • Locally, arsenic causes irritation of mucous membranes, and remotely, depression of the nervous system.

Carcinogenic Effects of Arsenic

  • Arsenic is a carcinogenic substance linked to lung, skin, and bladder carcinoma in populations with multiple exposures.

Absorption and Excretion of Arsenic

  • Arsenic is absorbed orally through the GIT, skin, and lungs, and can also be absorbed parenterally.
  • It is present in almost all tissues, with the highest concentration found in the liver, kidneys, and spleen.
  • Arsenic is excreted mainly by the kidneys, but also through feces, bile, sweat, milk, nails, and hair.

Signs and Symptoms of Acute Poisoning

  • Symptoms usually appear within 1 hour of ingestion, but may be delayed if arsenic is taken with food.
  • GIT symptoms include sweet metallic taste, nausea, persistent vomiting, burning in the mouth and throat, difficulty in swallowing, and garlic odor in breath.
  • Other symptoms include intense thirst, pain in the esophagus and abdomen, purging accompanied by tenesmus, and pain and irritation around the anus.
  • Renal symptoms include oliguria, uremia, albuminuria, red cells, and casts, as well as pain during micturition.
  • CVS symptoms include hypotension, circulatory collapse, ventricular tachycardia, and fibrillation.
  • Hepatic symptom includes fatty infiltration.
  • MS symptoms include pain in limbs and weakness.
  • CNS symptoms include headache, vertigo, and hyperthermia.

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