Undecylbenzene

232.40400

232.40

229-806-2

8C9LPO3Q9T

251008

DTXSID3028340|DTXSID6029096|DTXSID3029281|DTXSID10872311

2902909090

0

5.75990

N-undecylbenzene appears as a colorless liquid with a mild odor. Less dense than water and insoluble in water. Hence floats on water. (USCG, 1999)

0.8553 g/cm³ @ Temp: 20 °C

-5 °C

316 °C

> 230ºC

n20/D 1.482(lit.)

2.4X10-4 mm Hg @ 25 deg C

Insoluble in water.

Hydrocarbons, Aromatic

Vigorous reactions, sometimes amounting to explosions, can result from the contact with strong oxidizing agents. React exothermically with bases and with diazo compounds. Substitution at the benzene nucleus occurs by halogenation (acid catalyst), nitration, sulfonation, and the Friedel-Crafts reaction. May attack some forms of plastics (USCG, 1999).

UN 3082 9/PG 3

1

50/53

S24/25

N

Stable. Combustible. Incompatible with strong oxidizing agents.

P273, P301+P310, P331, P391, P405, P501

H304

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.

|Warning|H400 (100%): Very toxic to aquatic life [Warning Hazardous to the aquatic environment, acute hazard]|P273, P391, and P501|Aggregated GHS information provided by 38 companies from 1 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.|Danger|H304 (89.89%): May be fatal if swallowed and enters airways [Danger Aspiration hazard]|P273, P301+P310, P331, P391, P405, and P501|Aggregated GHS information provided by 2643 companies from 6 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.

Fire Extinguishing Agents Not to Be Used: Water may be ineffective. Fire Extinguishing Agents: Foam, dry chemical, carbon dioxide (USCG, 1999)

Goggles or face shield and rubber gloves. (USCG, 1999)

Undecylbenzene was detected in wastewater effluents at concns of 0.81-24.84 ng/l(1).

Undecylbenzene was detected in suspended sediment from rivers in Tokyo, Japan at concns of 0.12-3.14 ug/g(1).

Undecylbenzene's production and use as a component for detergents(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 6.3X10+5(SRC), determined from a log Kow of 8.14(2) and a regression-derived equation(3), indicates that undecylbenzene is expected to be immobile in soil(SRC). Volatilization of undecylbenzene from moist soil surfaces is expected to be an important fate process(SRC) given an estimated Henry's Law constant of 0.10 atm-cu m/mole(SRC), using a fragment constant estimation method(4), but adsorption may severely attenuate this process. Undecylbenzene is not expected to volatilize from dry soil surfaces(SRC) based upon a vapor pressure of 2.4X10-4 mm Hg(5).|AQUATIC FATE: Based on a classification scheme(1), an estimated Koc value of 6.3X10+5(SRC), determined from a log Kow of 8.14(2) and a regression-derived equation(3), indicates that undecylbenzene is expected to adsorb to suspended solids and sediment in water(SRC). Volatilization from water surfaces is expected(3) based upon an estimated Henry's Law constant of 0.10 atm-cu m/mole(SRC), developed using a fragment constant estimation method(4), but adsorption may severely attenuate this process(SRC). Volatilization half-lives for a model river and model lake are 4 hours and 6 days, respectively(SRC), using an estimation method(3) if adsorption is neglected. The estimated volatilization half-life from a model pond is 13 years if adsorption is considered(5). River die-away tests have shown that alkylbenzenes are readily biodegradable, with half-lives of 1.8 to 10.2 days for C-11 isomers in river water(6). According to a classification scheme(7), a BCF of 35 for dodecylbenzene measured in fish(8) suggests that bioconcentration of undecylbenzene in aquatic organisms is moderate.|ATMOSPHERIC FATE: According to a model of gas/particle partitioning of semivolatile organic compounds in the atmosphere(1), undecylbenzene, which has a vapor pressure of 2.4X10-4 mm Hg at 25 °C(2), is expected to exist in both the vapor and particulate phases in the ambient atmosphere. Vapor-phase undecylbenzene 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 20 hours(SRC) from its estimated rate constant of 1.9X10-11 cu cm/molecule-sec at 25 °C(SRC) using a structure estimation method(3) Particulate-phase undecylbenzene may be removed from the air by wet and dry deposition(SRC).

The rate constant for the vapor-phase reaction of undecylbenzene with photochemically-produced hydroxyl radicals has been estimated as 1.9X10-11 cu cm/molecule-sec at 25 °C(SRC) using a structure estimation method(1). This corresponds to an atmospheric half-life of about 20 hours at an atmospheric concentration of 5X10+5 hydroxyl radicals per cu cm(1). Undecylbenzene is not expected to undergo hydrolysis in the environment due to the lack of hydrolyzable functional groups(2).

An estimated BCF of 56(SRC) was calculated for undecylbenzene using a log Kow of 8.14(1) and a regression derived equation(2). The BCF value of bluegill sunfish exposed to dodecylbenzene in a flowing aquarium was 35(3). By analogy, the BCF value for undecylbenzene is expected to be similar(SRC). According to a classification scheme(4), these BCF values suggest bioconcentration in aquatic organisms is moderate.

The Koc of undecyclbenzene is estimated as 6.3X10+5(SRC), using a log Kow of 8.14(1) and a regression-derived equation(2). According to a classification scheme(3), this estimated Koc value suggests that undecylbenzene is expected to be immobile in soil.

The Henry's Law constant for undecylbenzene is estimated as 0.10 atm-cu m/mole(SRC) using a fragment constant estimation method(1). This Henry's Law constant indicates that undecylbenzene is expected to volatilize rapidly from water surfaces(2); however, adsorption may severely attenuate this process(SRC). 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 4 hours if adsorption is neglected(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 6 days if adsorption is neglected(SRC). The estimated volatilization half-life from a model pond is 13 years if adsorption is considered(3). Undecylbenzene's Henry's Law constant(1) indicates that volatilization from moist soil surfaces may occur; however, adsorption may attenuate this process(SRC). Undecylbenzene is not expected to volatilize from dry soil surfaces(SRC) based upon a vapor pressure of 2.4X10-4 mm Hg at 25 °C(4).

Undecylbenzene was detected in rivers in Tokyo, Japan at concns of 4.4-137.0 ng/l(1). Undecylbenzene was identified, not quantified, in the Besos and Llobregat Rivers, Spain near heavily industrialized areas(2,3). Undecylbenzene was identified, not quantified, in drinking water from Cincinnati, OH(4).

Occupational exposure to undecylbenzene may occur through inhalation and dermal contact with this compound at workplaces where undecylbenzene is produced or used. The general population may be exposed to undecylbenzene via dermal contact with this compound and consumer products containing undecylbenzene. (SRC)

Ingestion may cause intestinal disturbances. Contact with eyes causes mild irritation. (USCG, 1999)

INGESTION: induce vomiting if large amount has been swallowed. EYES: flush with water. SKIN: remove spills on skin or clothing by washing with soap and water. (USCG, 1999)

CHEM INT FOR LINEAR ALKYLBENZENE SULFONATES, 99.3%; OTHER, 0.7% (CONSUMPTION OF MIXED LINEAR ALKYLBENZENES, 1981)

All other basic organic chemical manufacturing|Benzene, C10-13-alkyl derivs.: ACTIVE|Benzene, mono-C10-13-alkyl derivs.: ACTIVE|Benzene, undecyl-: ACTIVE