CAS No.:49557-75-7 is the Chemical Abstracts Service Registry Number for a specific chemical compound. This compound is known as 2,4-Dichlorophenoxyacetic acid, which is a synthetic auxin commonly used as a herbicide. It is a systemic herbicide, meaning it is absorbed and translocated throughout the plant, ultimately causing the plant to die.
Physical and Chemical Properties
Below is a table outlining the physical and chemical properties of 2,4-Dichlorophenoxyacetic acid:
Property
Value
Chemical Formula
C8H6Cl2O3
Molecular Weight
221.04 g/mol
Appearance
White to light tan powder
Melting Point
140-141°C
Boiling Point
Decomposes at 160-165°C
Solubility
Soluble in water
Density
1.61 g/cm³ at 20°C
Vapor Pressure
0.007 mPa at 25°C
pH
2.7 (1% solution)
Flash Point
Not applicable
Stability
Stable under normal conditions, but may decompose at high temperatures or in the presence of strong acids or bases
2,4-Dichlorophenoxyacetic acid is widely used in agriculture to control broadleaf weeds in various crops, including cereals, pastures, and orchards. It is also used in residential settings for weed control in lawns and gardens.
However, it is important to handle this compound with care, as it can be toxic to humans and animals if not used properly. Proper protective equipment and application techniques should be employed when using products containing 2,4-Dichlorophenoxyacetic acid.
Frequently Asked Questions
What is the CAS registry number of 2,4-Dichlorophenoxyacetic acid?
The Chemical Abstracts Service (CAS) Registry Number for this compound is 49557-75-7.
What type of herbicide is 2,4-Dichlorophenoxyacetic acid and how does it work?
It is a synthetic auxin functioning as a systemic herbicide. Once absorbed, it translocates throughout the plant's vascular system, ultimately causing broadleaf weeds to die.
What are the primary applications of this compound?
It is widely applied in agriculture to eliminate broadleaf weeds in crops such as cereals, pastures, and orchards, as well as in residential lawn and garden weed management.
What is the physical appearance and solubility of the substance?
It appears as a white to light tan powder and is soluble in water, featuring a density of 1.61 g/cm³ at 20°C.
Under what conditions does this chemical decompose?
The compound boils and decomposes at 160-165°C. While stable under normal ambient conditions, decomposition may also occur at elevated temperatures or when exposed to strong acids or bases.
What precautions are required when handling 2,4-Dichlorophenoxyacetic acid?
Because it can be toxic to humans and animals if misused, users must wear appropriate protective equipment and implement rigorous application procedures.
