What is Diethylhydroxylamine used for?
DEHA is used in boiler water treatment applications, as an oxygen scavenger for medium and high pressure boilers. DEHA also functions as a free radical scavenger in polymerization, it is a short stopper in the production of styrene butadiene rubber.
What is the effect of Diethylhydroxylamine on animals?
May cause eye and skin irritation. May cause respiratory and digestive tract irritation. This substance has caused adverse reproductive and fetal effects in animals. Hygroscopic (absorbs moisture from the air).
What is DEHA oxygen scavenger?
Diethylhydroxylamine (DEHA) has been utilized as an oxygen scavenger in boiler systems in many industries for the past 20 years. Its unique combination of properties, such as volatility; the ability to passivate steel surfaces; and its very low toxicity makes it the oxygen scavenger of choice for many applications.
What is the effects of Diethylhydroxylamine on environment?
Environmental Effects The potential of N,N-diethylhydroxylamine for bioaccumulation is low. This product may persist in the environment. It is toxic to aquatic life with long lasting effects.
What is DEHA test for boiler water?
Dissolved oxygen in boiler system water causes corrosion and pitting of metal surfaces, which can lead to boiler inefficiency, equipment failure, and system downtime. DEHA (N,N- Diethylhydroxylamine) is added to boiler system water as an oxygen scavenger to keep the dissolved oxygen levels as low as possible.
How do you test for DEHA?
How Do I Test For DEHA? Currently there is no published standardized method or procedure to test for DEHA in boiler feedwater or condensate. However, a modification to a ferrous iron colorimetric test is commonly used to measure low levels of DEHA.
Why Photochemical smog is called so?
‘Photochemical smog’ is so-called because it is formed as a result of a photochemical reaction (i.e. in presence of sunlight) between oxides of nitrogen and hydrocarbons.
What is DEHA in water treatment?
Diethylhydroxylamine (DEHA) is an organic compound [(C2H5)2NOH] is a colorless liquid mainly used as an oxygen scavenger in water treatment. It is very important to remove oxygen from the boiler feed water as oxygen can cause serious issues in the steam producing plant by fostering corrosion in the total boiler system.
How do oxygen scavengers work?
Oxygen scavengers are a formulation of natural materials that react with oxygen and eliminate it. Oxygen scavengers harness the dissolved oxygen in an inert chemical reaction to lock up the oxygen and make it unable to damage other products within the package.
What is the difference between smog and photochemical smog?
The key difference between classical smog and photochemical smog is that classical smog forms due to humid climate, whereas photochemical smog forms due to smoke coming from automobiles and factories. The term smog can be described as fog or haze intensified by smoke or other atmospheric pollutants.
Does photochemical smog contain ozone?
Photochemical smog is a brownish-gray haze caused by the action of solar ultraviolet radiation on atmosphere polluted with hydrocarbons and oxides of nitrogen. It contains anthropogenic air pollutants, mainly ozone, nitric acid, and organic compounds, which are trapped near the ground by temperature inversion.
Which molecule is known as oxygen scavenger?
Ascorbic acid is often used to scavenge oxygen for generation of anaerobic environments for microbiology.
What is n-n-diethylhydroxylamine?
N, N -diethylhydroxylamine is a colorless liquid, although it is usually encountered as a solution. It is mainly used as an oxygen scavenger in water treatment .
What is the vapor pressure of diethylhydroxylamine?
If released to air, an extrapolated vapor pressure of 3.36 mm Hg at 25 °C, indicates that diethylhydroxylamine is expected to exist solely in the vapor phase in the ambient atmosphere.
How is diethylhydroxylamine degraded in the atmosphere?
Vapor-phase diethylhydroxylamine is degraded in the atmosphere by reaction with photochemically-produced hydroxyl radicals (SRC); the half-life for this reaction in air is estimated to be 4 hours (SRC), calculated from its rate constant of 1.01X10-10 cu cm/molecule-sec at 25 deg (3).
Can diethylhydroxylamine be hydrolyzed?
Diethylhydroxylamine is not expected to undergo hydrolysis in the environment due to the lack of hydrolyzable functional groups (2). Diethylhydroxylamine does not contain chromophores that absorb at wavelengths >290 nm and therefore is not expected to undergo direct photolysis by sunlight (2).