Diethylsulfid

· CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper not available or no answer, refer to appropriate telephone number listed on the inside back cover.

· ELIMINATE all ignition sources (no smoking, flares, sparks or flames) from immediate area.

Excerpt from ERG Guide 129 [Flammable Liquids (Water-Miscible / Noxious)]:

General First Aid:

For small (incipient) fires, use media such as "alcohol" foam, dry chemical, or carbon dioxide. For large fires, apply water from as far as possible. Use very large quantities (flooding) of water applied as a mist or spray; solid streams of water may be ineffective. Cool all affected containers with flooding quantities of water.

To fight fire, use water spray or mist, dry chemical, carbon dioxide, foam.

Wear self contained breathing apparatus for fire fighting if necessary.

SRP: Wastewater from contaminant suppression, cleaning of protective clothing/equipment, or contaminated sites should be contained and evaluated for subject chemical or decomposition product concentrations. Concentrations shall be lower than applicable environmental discharge or disposal criteria. Alternatively, pretreatment and/or discharge to a permitted wastewater treatment facility is acceptable only after review by the governing authority and assurance that "pass through" violations will not occur. Due consideration shall be given to remediation worker exposure (inhalation, dermal and ingestion) as well as fate during treatment, transfer and disposal. If it is not practicable to manage the chemical in this fashion, it must be evaluated in accordance with EPA 40 CFR Part 261, specifically Subpart B, in order to determine the appropriate local, state and federal requirements for disposal.

Use personal protective equipment. Avoid breathing vapors, mist or gas. Ensure adequate ventilation. Remove all sources of ignition. Evacuate personnel to safe areas. Beware of vapors accumulating to form explosive concentrations. Vapors can accumulate in low areas. Prevent further leakage or spillage if safe to do so. Do not let product enter drains. Contain spillage, and then collect with non-combustible absorbent material, (e.g. sand, earth, diatomaceous earth, vermiculite) and place in container for disposal according to local / national regulations.

Burn in a chemical incinerator equipped with an afterburner and scrubber but exert extra care in igniting as this material is highly flammable. Observe all federal, state, and local environmental regulations. Contact a licensed professional waste disposal service to dispose of this material.

SRP: The most favorable course of action is to use an alternative chemical product with less inherent propensity for occupational harm/injury/toxicity or environmental contamination. Recycle any unused portion of the material for its approved use or return it to the manufacturer or supplier. Ultimate disposal of the chemical must consider: the material's impact on air quality; potential migration in soil or water; effects on animal and plant life; and conformance with environmental and public health regulations.

Excerpt from ERG Guide 129 [Flammable Liquids (Water-Miscible / Noxious)]:

Immediate precautionary measure

Excerpt from ERG Guide 129 [Flammable Liquids (Water-Miscible / Noxious)]:

Where risk assessment shows air-purifying respirators are appropriate use a full-face respirator with multipurpose combination (US) or type ABEK (EN 14387) respirator cartridges as a backup to engineering controls. If the respirator is the sole means of protection, use a full-face supplied air respirator. Use respirators and components tested and approved under appropriate government standards such as NIOSH (US) or CEN (EU).

Handle with gloves. Safety glasses

TERRESTRIAL FATE: Based on a classification scheme(1), an estimated Koc value of 40(SRC), determined from a log Kow of 1.95(2) and a regression-derived equation(3), indicates that diethyl sulfide is expected to have very high mobility in soil(SRC). Volatilization of diethyl sulfide from moist soil surfaces is expected to be an important fate process(SRC) given a measured Henry's Law constant of 1.68X10-3 atm-cu m/mole(4). Diethyl sulfide is expected to volatilize from dry soil surfaces(SRC) based upon a vapor pressure of 60.2 mm Hg at 25 °C(SRC). Although biodegradation data on diethyl sulfide are not available(SRC, 2009), the closely related compound dimethyl sulfide showed 100% degradation over 2 days in an aerobic test using freshwater sediment(6); this suggests that biodegradation of diethyl sulfide is an important environmental fate process in soil(SRC).

AQUATIC FATE: Based on a classification scheme(1), an estimated Koc value of 50(SRC), determined from a log Kow of 1.95(2) and a regression-derived equation(3), indicates that diethyl sulfide is not expected to adsorb to suspended solids and sediment(SRC). Volatilization from water surfaces is expected(4) based upon a Henry's Law constant of 1.68X10-3 atm-cu m/mole(5). Using this Henry's Law constant and an estimation method(4), volatilization half-lives for a model river and model lake are 1.3 hours and 4 days, respectively(SRC). According to a classification scheme(6), an estimated BCF of 9(SRC), from its log Kow(2) and a regression-derived equation(7), suggests the potential for bioconcentration in aquatic organisms is low. Although biodegradation data on diethyl sulfide are not available(SRC, 2009), the closely related compound dimethyl sulfide showed 100% degradation over 2 days in an aerobic test using freshwater sediment(8); this suggests that biodegradation of 1,1'thiobisethane is an important environmental fate process in water(SRC).

ATMOSPHERIC FATE: According to a model of gas/particle partitioning of semivolatile organic compounds in the atmosphere(1), diethyl sulfide, which has a vapor pressure of 60.2 mm Hg at 25 °C(2), is expected to exist solely as a vapor in the ambient atmosphere. Vapor-phase diethyl sulfide is degraded in the atmosphere by reaction with photochemically-produced hydroxyl radicals(3); the half-life for this reaction in air is estimated to be about 26 hours(SRC), calculated from its rate constant of 1.50X10-11 cu cm/molecule-sec at 25 °C(3). Diethyl sulfide does not contain chromophores that absorb at wavelengths >290 nm(4) and therefore is not expected to be susceptible to direct photolysis by sunlight(SRC).

Diethyl sulfide was detected in 1 of 63 industrial waste-water samples collected from unspecified locations in the US at a concentration of less than 10 ug/L(1). Diethyl sulfide was not detected in air samples collected from a highway tunnel in western Pennsylvania in August-September 1979(2).

The Koc of diethyl sulfide is estimated as 50(SRC), using a log Kow of 1.95(1) and a regression-derived equation(2). According to a classification scheme(3), this estimated Koc value suggests that diethyl sulfide is expected to have very high mobility in soil.

AEROBIC: Biodegradation data are not available for diethyl sulfide(SRC, 2009); however, data are available for the related dimethyl sulfide. Dimethylsulfide, present at 2.5 mg/L, showed 100% degradation in 2 days using a freshwater sediment inoculum(1). Based upon the structural similarity of diethyl sulfide to dimethyl sulfude, diethyl sulfide is expected to biodegrade repidly under aerobic conditions(SRC).

ANAEROBIC: Biodegradation data are not available for diethyl sulfide(SRC, 2009); however, data are available for the related dimethyl sulfide. Dimethylsulfide, present at 3.4 mg/L, showed 100% degradation in 8 days using a freshwater sediment inoculum under anoxic conditions(1). Dimethylsulfide, present at 0.3 mg/L, showed 100% degradation in 2 days using an anoxic salt marsh sediment as inoculum(2). Based upon the structural similarity of diethyl sulfide to dimethyl sulfude, diethyl sulfide is expected to biodegrade repidly under anaerobic conditions(SRC).

An estimated BCF of 9 was calculated in fish for diethyl sulfide(SRC), using a log Kow of 1.95(1) and a regression-derived equation(2). According to a classification scheme(3), this BCF suggests the potential for bioconcentration is aquatic organisms is low.

The Henry's Law constant for diethyl sulfide has been measured as 1.68X10-3 atm-cu m/mole(1). This Henry's Law constant indicates that diethyl sulfide is expected to volatilize rapidly from water surfaces(2). Based on this Henry's Law constant, the volatilization half-life from a model river (1 m deep, flowing 1 m/sec, wind velocity of 3 m/sec)(2) is estimated as 1.3 hours(SRC). The volatilization half-life from a model lake (1 m deep, flowing 0.05 m/sec, wind velocity of 0.5 m/sec)(2) is estimated as 4 days(SRC). Diethyl sulfide's Henry's Law constant indicates that volatilization from moist soil surfaces may occur(SRC). The potential for volatilization of diethyl sulfide from dry soil surfaces may exist(SRC) based upon a vapor pressure of 60.2 mm Hg(3).