化合物详情

ATMOSPHERIC FATE: According to a model of gas/particle partitioning of semivolatile organic compounds in the atmosphere(1), urea nitrate, which has an estimated vapor pressure of 7.59X10-8 mm Hg at 25 °C(SRC), determined from a fragment constant method(2), is expected to exist solely in the particulate phase in the ambient atmosphere. Particulate-phase urea nitrate may be removed from the air by wet or dry deposition(SRC). Urea nitrate does not contain chromophores that absorb at wavelengths >290 nm(3), and therefore is not expected to be susceptible to direct photolysis by sunlight(SRC).

Using a structure estimation method based on molecular connectivity indices(1), the Koc of urea nitrate can be estimated to be 6.0(SRC). According to a classification scheme(2), this estimated Koc value suggests that urea nitrate is expected to have very high mobility in soil.

An estimated BCF of 3.2 was calculated in fish for urea nitrate(SRC), using an estimated log Kow of -3.51(1) and a regression-derived equation(2). According to a classification scheme(3), this BCF suggests the potential for bioconcentration in aquatic organisms is low(SRC).

The Henry's Law constant for urea nitrate is estimated as 1.7X10-17 atm-cu m/mole(SRC) using a fragment constant estimation method(1). This Henry's Law constant indicates that urea nitrate is expected to be essentially nonvolatile from water surfaces(2). Urea nitrate is not expected to volatilize from dry soil surfaces(SRC) based upon an estimated vapor pressure of 7.59X10-8 mm Hg(SRC), determined from a fragment constant method(3).

Urea nitrate is not expected to undergo hydrolysis in the environment due to the lack of functional groups that hydrolyze under environmental conditions(1). Urea nitrate does not contain chromophores that absorb at wavelengths >290 nm(1), and therefore is not expected to be susceptible to direct photolysis by sunlight(SRC).

Urea nitrate's production and use in explosives and as a chemical reagent(1) may result in its release to the environment through various waste streams; its use as a fertilizer(1) will result in its direct release to the environment(SRC).

Occupational exposure to urea nitrate may occur through inhalation of dust and dermal contact with this compound at workplaces where urea nitrate is produced or used. Use data indicate that the general population may be exposed to urea nitrate via dermal contact with this compound, particularly in locations where urea nitrate is used as a fertilizer. (SRC)

Urea nitrate's production and use in explosives and as a chemical reagent may result in its release to the environment through various waste streams; its use as a fertilizer will result in its direct release to the environment. If released to air, an estimated vapor pressure of 7.59X10-8 mm Hg at 25 °C indicates urea nitrate will exist solely in the particulate phase in the atmosphere. Particulate-phase urea nitrate will be removed from the atmosphere by wet or dry deposition. Urea nitrate does not contain chromophores that absorb at wavelengths >290 nm, and therefore is not expected to be susceptible to direct photolysis by sunlight. If released to soil, urea nitrate is expected to have very high mobility based upon an estimated Koc of 6.0. Volatilization from moist soil surfaces is no...

Methemoglobinemia - The presence of increased methemoglobin in the blood; the compound is classified as secondary toxic effect

/SIGNS AND SYMPTOMS/ /IT IS/ MILDLY IRRITATING TO SKIN, MUCOUS MEMBRANES.

Advanced treatment: Consider orotracheal or nasotracheal intubation for airway control in the patient who is unconscious or is in severe respiratory distress. Monitor cardiac rhythm and treat arrhythmias if necessary. Start IV administration of D5W /SRP: "To keep open", minimal flow rate/. Use 0.9% saline (NS) or lactated Ringer's (LR) if signs of hypovolemia are present. For hypotension with signs of hypovolemia, administer fluid cautiously. If unresponsive to these measures, vasopressors may be helpful. Watch for signs of fluid overload ... . Treat seizures with diazepam or lorazepam ... . Administer 1% solution methylene blue if patient is symptomatic with severe hypoxia, cyanosis, and cardiac compromise not responding to oxygen. ... . Use proparacaine hydrochloride to assist eye irr...