What does 66 powder mean?

HCH powder, also known as HCH, chemical name HCH, commonly known as lindane.

Usually used in crops such as fruits and vegetables. It has contact killing, stomach poisoning and fumigation effects on insects.

It is a broad-spectrum insecticide used to control many pests, such as trees, vegetables, rice and cash crops. It is also a soil insecticide.

Toxic, teratogenic and easy to remain. Pesticide residues on fruits and vegetables will not only harm people, but also affect the growth of crops in the next year.

At present, this pesticide has been banned in many parts of the world, including Chinese mainland. Usually in the form of crystals, it is not easily soluble in water and biodegradable, which will affect the nerve center, liver and kidney of human body and easily lead to the birth of deformed children.

Extended data

Human injury

When people are poisoned, the nervous system is mainly characterized by headache, dizziness, excessive sweating, fatigue, tremor, epilepsy-like convulsions of upper and lower limbs, unstable standing, dyskinesia, unconsciousness and even coma. Inhibition of respiratory center can cause respiratory failure. Causes symptoms such as salivation, nausea, vomiting, discomfort and pain in the upper abdomen and diarrhea in the digestive system. Respiratory and circulatory system can cause congestion of pharynx, larynx and nasal mucosa, foreign body sensation in larynx, sputum foaming, congestion, dyspnea, hydrops in lung, blood pressure drop, arrhythmia, tachycardia and even ventricular fibrillation. Irritation to the skin leads to redness, papules, blisters and dermatitis. Even erosion. Tears and severe pain in the eyes. High dose of BHC will damage the central nervous system and some parenchymal organs.

environmental harm

BHC is stable and difficult to decompose, which directly pollutes crops. At the same time, pesticides remain in water and soil and enter the human body through the food chain, but the human body cannot excrete them through metabolism. If it accumulates to a certain extent, it will poison people.

BHC was the most abundant and widely used pesticide in China in 1950s and 1960s, which played a great role in ensuring agricultural harvest and preventing infectious diseases.

It is estimated that from 1950 to 2000, the global total output of lindane was about 600,000 tons, most of which was used in agriculture.

As lindane is a persistent organic pollutant, it has certain toxicity to human body. As of June 2006165438+1October, the use of lindane has been banned in 52 countries and restricted in 33 countries.

The Stockholm Convention Conference in 2009 explicitly banned the production and application of lindane in agriculture.

China stopped using HCH a long time ago, but lindane may still be produced and used. The use (cancellation) of HCH has been banned in Hong Kong 199 1.

References:

Baidu encyclopedia entry -66 powder