Dibenzyl sulfide

214.33

214.33

1911157

208-703-6

Q08048624M

212544|6648

3335

DTXSID6024599

PLATES FROM ETHER OR CHLOROFORM|COLORLESS PLATES

2930909090

25.3

4.19

White Crystals

1.0583 g/cm³ @ Temp: 50 °C

49.5 °C

111-115 °C @ Press: 0.3 Torr

>110°C

1.610

H2O: <0.1 g/100 mL at 21 ºC;Insoluble in water; soluble in ethanol, ether, and CS2.

0-10°C

Oral-rat LD50: > 2000 mg/kg

Flammable; burning produces toxic sulfur oxide fumes

Insoluble in water.

Sulfides, Organic

Organosulfides, such as DIBENZYL SULFIDE, are incompatible with acids, diazo and azo compounds, halocarbons, isocyanates, aldehydes, alkali metals, nitrides, hydrides, and other strong reducing agents. Reactions with these materials generate heat and in many cases hydrogen gas. Many of these compounds may liberate hydrogen sulfide upon decomposition or reaction with an acid.

UN 3335

2

22-24/25

DC0512500

Ventilated, low temperature and dry

Stable. Combustible. Incompatible with strong oxidizing agents.

SRP: At the time of review, criteria for land treatment or burial (sanitary landfill) disposal practices are subject to significant revision. Prior to implementing land disposal of waste residue (including waste sludge), consult with environmental regulatory agencies for guidance on acceptable disposal practices.

This chemical is combustible. (NTP, 1992)

Fires involving this material can be controlled with a dry chemical, carbon dioxide or Halon extinguisher. (NTP, 1992)

Excerpt from ERG Guide 171 [Substances (Low to Moderate Hazard)]: As an immediate precautionary measure, isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters (75 feet) for solids. SPILL: Increase, in the downwind direction, as necessary, the isolation distance shown above. FIRE: If tank, rail car or tank truck is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directions; also, consider initial evacuation for 800 meters (1/2 mile) in all directions. (ERG, 2016)

SMALL SPILLS AND LEAKAGE: Should a spill occur while you are handling this chemical, FIRST REMOVE ALL SOURCES OF IGNITION, then you should dampen the solid spill material with 60-70% ethanol and transfer the dampened material to a suitable container. Use absorbent paper dampened with 60-70% ethanol to pick up any remaining material. Seal the absorbent paper, and any of your clothes, which may be contaminated, in a vapor-tight plastic bag for eventual disposal. Solvent wash all contaminated surfaces with 60-70% ethanol followed by washing with a soap and water solution. Do not reenter the contaminated area until the Safety Officer (or other responsible person) has verified that the area has been properly cleaned. STORAGE PRECAUTIONS: You should store this material under ambient temperatures. (NTP, 1992)

MINIMUM PROTECTIVE CLOTHING: If Tyvek-type disposable protective clothing is not worn during handling of this chemical, wear disposable Tyvek-type sleeves taped to your gloves. RECOMMENDED RESPIRATOR: Where the neat test chemical is weighed and diluted, wear a NIOSH-approved half face respirator equipped with a combination filter cartridge, i.e. organic vapor/acid gas/HEPA (specific for organic vapors, HCl, acid gas, SO2 and a high efficiency particulate filter). (NTP, 1992)

moderately toxic

Benzyl sulfide's use in organic synthesis(1) may result in its release to the environment through various waste streams(SRC).

TERRESTRIAL FATE: Based on a classification scheme(1), an estimated Koc value of 5400(SRC), determined from an estimated log Kow of 4.33(2,SRC) and a regression-derived equation(3), indicates that benzyl sulfide is expected to be immobile in soil(SRC). Volatilization of benzyl sulfide from moist soil surfaces is not expected to be an important fate process(SRC) given an estimated Henry's Law constant of 5.1X10-6 atm-cu m/mole(SRC), using a fragment constant estimation method(4). Benzyl sulfide is not expected to volatilize from dry soil surfaces based on an estimated vapor pressure of 2.9X10-4 mm Hg(SRC), determined from a fragment constant method(5). Limited biodegradation data indicate benzyl sulfide is amenable to aerobic biodegradation with formation of benzylmercaptoacetic acid; under anaerobic conditions benzyl mercaptan, toluene, and hydrogen sulfide have been identified as metabolites(6).|AQUATIC FATE: Based on a classification scheme(1), an estimated Koc value of 5400(SRC), determined from an estimated log Kow of 4.33(2,SRC) and a regression-derived equation(3), indicates that benzyl sulfide is expected to adsorb to suspended solids and sediment in water(SRC). Benzyl sulfide is expected to volatilize slowly from water surfaces(3,SRC) based on an estimated Henry's Law constant of 5.1X10-6 atm-cu m/mole(SRC), developed using a fragment constant estimation method(4). Estimated volatilization half-lives for a model river and model lake are 11 and 82 days, respectively(3,SRC). However, adsorption to suspended solids and sediment in the water column is expected to attenuate this process(SRC). The volatilization half-life from a model pond 2 m deep is estimated to be about 120 days ignoring adsorption(5); when considering maximum adsorption, the volatilization half-life increases to about 6 years(5). According to a classification scheme(6), an estimated BCF of 1200(3,SRC), from the estimated log Kow(2,SRC), suggests the potential for bioconcentration in aquatic organisms is very high(SRC). Limited biodegradation data indicate benzyl sulfide is amenable to aerobic biodegradation with formation of benzylmercaptoacetic acid; under anaerobic conditions benzyl mercaptan, toluene, and hydrogen sulfide have been identified as metabolites(7).|ATMOSPHERIC FATE: According to a model of gas/particle partitioning of semivolatile organic compounds in the atmosphere(1), benzyl sulfide, which has an estimated vapor pressure of 2.9X10-4 mm Hg at 25 °C(2,SRC), will exist in both the vapor and particulate phases in the ambient atmosphere. Vapor-phase benzyl sulfide 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 15 hours(3,SRC). Particulate-phase benzyl sulfide may be physically removed from the air by wet and dry deposition(SRC).

The rate constant for the vapor-phase reaction of benzyl sulfide with photochemically-produced hydroxyl radicals has been estimated as 2.6X10-11 cu cm/molecule-sec at 25 °C(SRC) using a structure estimation method(1,SRC). This corresponds to an atmospheric half-life of about 15 hours at an atmospheric concentration of 5X10+5 hydroxyl radicals per cu cm(1,SRC).

An estimated BCF of 1200 was calculated for benzyl sulfide(SRC), using an estimated log Kow of 4.33(1,SRC) and a regression-derived equation(2). According to a classification scheme(3), this BCF suggests the potential for bioconcentration in aquatic organisms is very high(SRC).

The Koc of benzyl sulfide is estimated as approximately 5400(SRC), using a log Kow of 4.33(1,SRC) and a regression-derived equation(2,SRC). According to a classification scheme(3), this estimated Koc value suggests that benzyl sulfide is expected to be immobile in soil(SRC).

The Henry's Law constant for benzyl sulfide is estimated as 5.1X10-6 atm-cu m/mole(SRC) using a fragment constant estimation method(1). This Henry's Law constant indicates that benzyl sulfide is expected to volatilize slowly from water surfaces(2,SRC). Based on this Henry's Law constant, the estimated volatilization half-life from a model river (1 m deep, flowing 1 m/sec, wind velocity of 3 m/sec) is approximately 11 days(2,SRC). The estimated volatilization half-life from a model lake (1 m deep, flowing 0.05 m/sec, wind velocity of 0.5 m/sec) is approximately 82 days(2,SRC). The volatilization half-life from a model pond 2 m deep is estimated to be about 120 days ignoring adsorption(3); when considering maximum adsorption, the volatilization half-life increases to about 6 years(3). Benzyl sulfide's Henry's Law constant(1,SRC) indicates that volatilization from moist soil surfaces may occur(SRC). Benzyl sulfide is not expected to volatilize from dry soil surfaces based on an estimated vapor pressure of 2.9X10-4 mm Hg(SRC), determined from a fragment constant method(3).

Occupational exposure to benzyl sulfide may occur through inhalation of dust particles and dermal contact with this compound at workplaces where benzyl sulfide is used. (SRC)

Excerpt from ERG Guide 171 [Substances (Low to Moderate Hazard)]: Inhalation of material may be harmful. Contact may cause burns to skin and eyes. Inhalation of Asbestos dust may have a damaging effect on the lungs. Fire may produce irritating, corrosive and/or toxic gases. Some liquids produce vapors that may cause dizziness or suffocation. Runoff from fire control may cause pollution. (ERG, 2016)

EYES: First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes without specific instructions from a physician. IMMEDIATELY transport the victim after flushing eyes to a hospital even if no symptoms (such as redness or irritation) develop. SKIN: IMMEDIATELY flood affected skin with water while removing and isolating all contaminated clothing. Gently wash all affected skin areas thoroughly with soap and water. IMMEDIATELY call a hospital or poison control center even if no symptoms (such as redness or irritation) develop. IMMEDIATELY transport the victim to a hospital for treatment after washing the affected areas. INHALATION: IMMEDIATELY leave the contaminated area; take deep breaths of fresh air. IMMEDIATELY call a physician and be prepared to transport the victim to a hospital even if no symptoms (such as wheezing, coughing, shortness of breath, or burning in the mouth, throat, or chest) develop. Provide proper respiratory protection to rescuers entering an unknown atmosphere. Whenever possible, Self-Contained Breathing Apparatus (SCBA) should be used; if not available, use a level of protection greater than or equal to that advised under Protective Clothing. INGESTION: If the victim is conscious and not convulsing, give 1 or 2 glasses of water to dilute the chemical and IMMEDIATELY call a hospital or poison control center. Generally, the induction of vomiting is NOT recommended outside of a physician's care due to the risk of aspirating the chemical into the victim's lungs. However, if the victim is conscious and not convulsing and if medical help is not readily available, consider the risk of inducing vomiting because of the high toxicity of the chemical ingested. Ipecac syrup or salt water may be used in such an emergency. IMMEDIATELY transport the victim to a hospital. If the victim is convulsing or unconscious, do not give anything by mouth, ensure that the victim's airway is open and lay the victim on his/her side with the head lower than the body. DO NOT INDUCE VOMITING. IMMEDIATELY transport the victim to a hospital. (NTP, 1992)

benzyl sulfide

Benzene, 1,1'-[thiobis(methylene)]bis-: ACTIVE