How to distinguish the toxicity of pesticides?

Pesticides are more or less toxic. The toxicity of pesticides has a certain relationship with the chemical structure of the pesticide itself, the degree of hydrolysis, the photochemical reaction, redox and the reaction of certain components in the human body. According to pesticide toxicity, it can be divided into highly toxic pesticides, highly toxic pesticides, poisoned pesticides, low-toxic pesticides and micro-toxic pesticides.
So how do you identify the toxicity of pesticides ? The China Pesticide Network Xiaobian makes the following summary for you.
Judging criteria for pesticide toxicity
1. Microtoxic pesticides.

The median lethal dose is 5000 mg/kg/kg body weight. Such as carbendazim, chlorothalonil , ethyl aluminum phosphate, zinc, zinc, sterilized Dan, simazine and so on. Therefore, when purchasing pesticides to control diseases, insects, rats and grasses , the majority of flower farmers must know the toxicity of the pesticides purchased in advance, and use them under the guidance of technicians according to the requirements of the instructions. .
2. Low toxicity pesticides.
The median lethal dose is 501 to 5000 mg/kg body weight. Such as trichlorfon , insecticidal double, malathion, phoxim, acephate, metformin, butachlor, glyphosate , thiophanate, trifluralin, bentazon, atla Jin et al;
3. Poisoning pesticides.
The median lethal dose is 101 to 500 mg/kg body weight. Such as Dimethoate, Ye Yu San, Kuweiwei, Dixon, 402, pyrethroid pesticides;
4. Highly toxic pesticides.
The median lethal dose is 51 to 100 mg/kg body weight. Such as carbofuran, fluoroacetamide, cyanide, 401, zinc phosphide, aluminum phosphide, arsenic, etc.;
5. Highly toxic pesticides.
The median lethal dose is 1 to 50 mg/kg body weight. Such as monocrotophos, phosphorus amine, methamidophos, Suhua 203, 3911, etc.;

Learn more about pesticide standards , please pay attention to China's pesticide network !

Spiral steel pipe


Spiral steel pipes are made by steel coil, extrusion forming under the normal temperature, then taken the technology of double wire and double-faced submerged-arc welded.

During molding process of spiral welded steel pipe, steel plate has uniform deformation and light residual stress, thus the surface has no scratches. Spiral Steel Pipe has more flexible thicknesses and diameters, especially in making high-grade thick pipes with small or medium aperture, these techniques has incomparable advantages in satisfying your needs.

HSAW PIPE


Application:

Spiral steel pipe is mainly used in public waterworks, petrochemical industry, chemical industry, electric power industry, agricultural irrigation and urban construction etc.

For liquid transportation: water supply, drain water, petroleum transportation, etc.

For gas transmission: coal gas, steam, liquefied petroleum gas, gas etc.

For structure: piling, bridge, wharf, road, architectural structure, etc.

Material:

Q235A, Q235B, 10#, 20#, Q345(16Mn), L245(B), L290(X42), L320(X46), L360(X52), L390X56), L415(X60), L450(X65), L485(X70), L555(X80), L290NB/MB(X42N/M), L360NB/MB(X52N/M), L390NB/MB(X56N/M), 415NB/MB(X60N/M), L450MB(X65), L485MB(X70), L555MB(X80)


process

SSAW PIPE

Packaging Details

Plastic caps on both ends, Steel bundle, Woven bag or acc. to customers' request.

Delivery Time

15 days after receiving deposit

 

If you have any questions, please contact with us directly and welcome you can visit our Factory.









Spiral Steel Pipe

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HEBEI CHENGYUAN PIPE INDUSTRY GROUP CO.,LTD , https://www.hbcytube.com