Aluminium Phosphide Toxicity Explained
Aluminium phosphide (AlP) is a chemical compound often used as a pest control agent. Its toxicity stems from its reaction with moisture.
Mechanism of Toxicity
Upon contact with water or moisture (present in the air, stomach, or gastrointestinal tract), aluminium phosphide undergoes hydrolysis, releasing phosphine gas ($PH_3$).
The chemical reaction is:
Al P + 3 H₂O → Al(OH)₃ + PH₃
Phosphine ($PH_3$) is a highly toxic, flammable gas. It interferes with cellular respiration and mitochondrial function, leading to severe systemic toxicity affecting multiple organs, particularly the heart, liver, kidneys, and central nervous system.
Conclusion
The toxic effects of aluminium phosphide are primarily due to the release of Phosphine gas.
Important Questions from Chemical Poisoning
Consider the following statements regarding organophosphate-induced delayed polyneuropathy (OPIDN) :
1. It is a rare complication and occurs 2 - 3 weeks after acute exposure.
2. It is a feature of poisoning with certain organophosphorus compounds such as triorthocresyl phosphate.
3. Inhibition of acetylcholinesterase causes motor polyneuropathy with no evidence of sensory loss.
4. There is no specific therapy although regular physiotherapy may limit deformity caused by muscle wasting.
Which of the statements given above are correct?
- Use of calcium carbide for the artificial ripening of fruits is banned but it is often reported to be illegally used. What is/are the likely health hazards of exposure to this chemical?
1. Permanent damage to the eyes
2. Pulmonary edema
3. Irritation of mouth, throat and nose
Select the correct answer using the codes given below: - Which of the following statements is correct regarding Malachite that is used as food adulterant?
Which of the following parts of the human body can be used as a sample/samples for the presence of mercury?
1. Blood
2. Hair
3. Nail
Select the correct answer using the code given below:
Consider the following statements:
1. All organochlorine pesticides (OCPs) enter the human bodies through food chain only.
2. Some of the OCPs are categorized as Persistent Organic Pollutants.
Which of the statements given above is/are correct?
