7-chloro-2,5-dimethyl-[1,2,4]triazolo[1,5-a]pyrimidine cas 80812-36-8 white powder support customized

The most common name for this substance is 2-methyl-4-chlorophenoxyacetic acid, which is usually simply referred to as MCPA.
It is a widely used benzoylcarboxylic acid type selective systemic and translocating herbicide.
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1. Basic Information
· CAS Number: 80812-36-8
· Chemical Name: 2-Methyl-4-chlorophenoxyacetic acid
· English Name: 2-Methyl-4-chlorophenoxyacetic acid
· Molecular Formula: C₉H₉ClO₃
· Structural Formula: ```
O
∥ Cl-◗-O-CH₂-C-OH
|
CH₃
```
(Where ◗ represents the benzene ring)
2. Nature
· Physical form: The pure product is a white or off-white crystalline solid.
· Melting point: Approximately 118 - 119°C.
· Solubility:
· Insoluble in water.
· Easily soluble in most organic solvents, such as ethanol, acetone, ether, etc.
· Chemical properties: It is a weak acid and can react with bases to form corresponding salts (such as sodium salt, potassium salt, ammonium salt of MCPA). The solubility of these salts in water is much higher than that of their acid form.
3. Main Uses
MCPA is mainly used as a selective herbicide.
· Target crop: Primarily used in the field of cereal crops (such as wheat, barley, oats, rice, corn).
· Target weeds: Capable of effectively controlling a variety of annual and perennial broadleaf weeds, such as sowthistle, knotweed, pigweed, chickweed, field morning glory, and chickweed.
· Mechanism of action: As a plant growth regulator, it is absorbed by the leaves and roots of the weeds and transported throughout the plant. By interfering with the hormone balance of the plants, it causes abnormal growth (twisting, swelling) in the weeds, ultimately depleting their nutrients and leading to death. Cereal crops have better tolerance to MCPA due to their ability to metabolize and break down it.
· Formulation: It is usually sold in the market in the form of salts (such as sodium MCPA) or esters, and is formulated into water solutions, emulsions, wettable powders, etc., to improve its ease of use and effectiveness.
4. Safety and Toxicity
MCPA is a type of pesticide which poses certain risks to humans and the environment. It must be used in accordance with the instructions.
· Toxicity classification: It belongs to low-to-medium toxicity pesticides.
· Impact on human health:
· Acute toxicity: Ingestion, inhalation or extensive skin contact may cause poisoning. Symptoms include nausea, vomiting, diarrhea, headache, weakness, and in severe cases, damage to muscles and the nervous system.
· Chronic toxicity: Long-term or repeated exposure may have an impact on the liver, kidneys and thyroid. The International Agency for Research on Cancer (IARC) classifies it as Group 2B, which means "possibly carcinogenic to humans", indicating limited evidence.
· Environmental impact:
· Toxic to aquatic organisms such as fish.
· It can be degraded by microorganisms in the soil, with a half-life typically ranging from several days to several weeks, depending on environmental conditions.
5. Regulations and Control Measures
Due to its potential risks, MCPA is strictly regulated worldwide.
· In China, it is a registered pesticide, and its production, sale and use must comply with relevant regulations such as the "Pesticide Administration Regulations".
· In many countries and regions, maximum residue limits (MRLs) have been set for the residues of MCPA in food.
Summary

CAS 80812-36-8 (MCPA) is a highly important and long-used selective herbicide of the phenyloxycarboxylic acid type. It has played a significant role in increasing grain yields. However, as a chemical pesticide, it poses potential risks to human health and the environment. Therefore, strict safety operation procedures must be followed and it is subject to strict regulation by relevant laws and regulations.
Important reminder: When handling any chemicals, especially pesticides, please be sure to:
1. Carefully read and follow the instructions on the product label.
2. Wear appropriate personal protective equipment (such as gloves, goggles, protective clothing).
3. Store properly and keep away from children and pets.
4. Dispose of waste in accordance with local regulations.