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2 4 D question
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<blockquote data-quote="MikeC" data-source="post: 553012" data-attributes="member: 1604"><p>Important Characteristics of 2,4-D</p><p>Volatility - volatility refers to the tendency of a chemical to vaporize. Vapor drift is the movement of herbicide vapor off-target. The level of volatility of a chemical is related to the compounds vapor pressure. The amine and sodium salts of 2,4-D are generally considered to be of minimal volatility hazard. Ester formulations, however, are volatile compounds. Most current, commercial 2,4-D ester formulations are termed "low-volatile", but keep in mind that they remain potentially volatile compounds. Under hot and humid conditions the volatility hazard increases. Consequently, extreme care should be taken when applying 2,4-D and other hormone-type herbicides.</p><p></p><p>Salt Formulations - amine salts are the most commonly used form. The amine salts of 2,4-D are not considered volatile; however, windy conditions can cause physical drift of the herbicide onto susceptible plants. Most amine salts readily dissolve in water to form clear solutions.</p><p></p><p>Ester Formulations - esters are essentially insoluble in water. The ester is diluted in oil with an emulsifying agent added. When mixed with water, the emulsifier keeps the tiny oil-like droplets suspended, much the way butterfat is suspended in milk. When mixed with water, the 2,4-D emulsion appears milky colored. Ester formulations are generally considered to be slightly more active than the salt formulations and are more susceptible to volatility.</p></blockquote><p></p>
[QUOTE="MikeC, post: 553012, member: 1604"] Important Characteristics of 2,4-D Volatility - volatility refers to the tendency of a chemical to vaporize. Vapor drift is the movement of herbicide vapor off-target. The level of volatility of a chemical is related to the compounds vapor pressure. The amine and sodium salts of 2,4-D are generally considered to be of minimal volatility hazard. Ester formulations, however, are volatile compounds. Most current, commercial 2,4-D ester formulations are termed “low-volatile”, but keep in mind that they remain potentially volatile compounds. Under hot and humid conditions the volatility hazard increases. Consequently, extreme care should be taken when applying 2,4-D and other hormone-type herbicides. Salt Formulations - amine salts are the most commonly used form. The amine salts of 2,4-D are not considered volatile; however, windy conditions can cause physical drift of the herbicide onto susceptible plants. Most amine salts readily dissolve in water to form clear solutions. Ester Formulations - esters are essentially insoluble in water. The ester is diluted in oil with an emulsifying agent added. When mixed with water, the emulsifier keeps the tiny oil-like droplets suspended, much the way butterfat is suspended in milk. When mixed with water, the 2,4-D emulsion appears milky colored. Ester formulations are generally considered to be slightly more active than the salt formulations and are more susceptible to volatility. [/QUOTE]
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