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Chemical Name: 2,2-dichloropropanoic acid

Formula: C3H4Cl2O2

Molecular Weight: 164.95

CAS No.: 127-20-8 (sodium salt); 75-99-0 (acid)



Appearance: Dalapon is a type of acid that is usually formulated with sodium and magnesium salts The acid itself is not used directly. Commercial products usually contain 85% sodium salt or mixed sodium and magnesium salts of dalapon. In its pure acid form, dalapon is a colorless liquid with an acrid odor. As sodium-magnesium salts, it is a white to off-white powder. 

Solubility: In water 900,000 mg/L @ 25°C (sodium salt). In Other Solvents: alkali solvents, v.s.; ethanol v.s.; acetone, benzene, and methanol s.

Melting Point: (with decomposition) 166.5°C (sodium salt).

Vapor Pressure: 0.01 mPa @ 20°C (sodium salt).

Partition Coefficient: 0.778.

Adsorption Coefficient: 1 (sodium salt).

Specification: 95%TC

Uses: Dalapon is an organochlorine herbicide and plant growth regulator used to control specific annual and perennial grasses, such as quackgrass, Bermuda grass, Johnson grass, as well as cattails and rushes. The major food crop use of dalapon is on sugarcane and sugar beets. It is also used on various fruits, potatoes, carrots, asparagus, alfalfa, and flax, as well as in forestry, home gardening, and in or near water to control reed and sedge growth. Dalapon is applied both before the target plant comes up and after the plant emerges. Commercial products consist of the sodium salt or mixed sodium and magnesium salts of dalapon.


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