シクロペンタノン

Excerpt from ERG Guide 128 [Flammable Liquids (Water-Immiscible)]:

Use powder, AFFF, foam, carbon dioxide. In case of fire: keep drums, etc., cool by spraying with water.

Fresh air, rest. Refer for medical attention.

Rinse and then wash skin with water and soap.

First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention.

· 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.

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.

General First Aid:

Excerpt from ERG Guide 128 [Flammable Liquids (Water-Immiscible)]:

Immediate precautionary measure

TERRESTRIAL FATE: Cyclopentanone is not expected to hydrolyse in soils(1), or undergo photolysis on sunlit soil surfaces due to lack of >290 nm UV adsorption(2). A single 5-day BOD screening test, which utilized activated sludge for inocula, suggests that cyclopentanone will biodegrade rapidly upon acclimation in terrestrial environments(3). An estimated Koc of 30(1) indicates cyclopentanone should have a very high mobility in soil(4). A Henry's Law constant of 1.0X10-5 atm-cu m/mole(5) suggests volatilization of cyclopentanone from moist soils may be an important fate process(1). Based on a vapor pressure of 11.4 mm Hg at 25 °C(6), cyclopentanone should evaporate from dry surfaces, especially when present in high concn such as in spill situations(SRC).

AQUATIC FATE: Cyclopentanone is not expected to hydrolyze(1) or undergo direct photolysis in aquatic systems(2). A single 5-day BOD screening test, which utilized activated sludge for inocula, suggests that cyclopentanone will biodegrade rapidly upon acclimation in natural waters(3). An estimated log bioconcentration factor (log BCF) of -0.05(1) indicates cyclopentanone should not bioconcentrate in aquatic organisms(SRC). An estimated Koc of 30(1) indicates cyclopentanone should not partition from the water column to organic matter contained in sediments and suspended solids(SRC). A Henry's Law constant of 1.0X10-5 atm-cu m/mole at 25 °C(4) indicates that volatilization of cyclopentanone from natural bodies of water should be an important fate process(1). Based on this Henry's Law constant, the volatilization half-life from a model river has been estimated to be 3.5 days(1,SRC). The volatilization half-life from an model pond, which considers the effect of adsorption, has been estimated to be about 40 days(5,SRC).

ATMOSPHERIC FATE: Based on a vapor pressure of 11.4 mm Hg at 25 °C(1), cyclopentanone is expected to exist almost entirely in the vapor phase in ambient air(2). Vapor phase reactions with photochemically produced hydroxyl radicals in the atmosphere have been shown to be important(SRC). A rate constant for cyclopentanone of 2.94X10-12 cu cm/molecule-sec at 25 °C corresponds to an atmospheric half-life of about 5.5 days at an atmospheric concn of 5X10+5 hydroxyl radicals per cu cm(3). Direct photolysis in air is not expected to be an important environmental fate process(4).

Cough. Sore throat.

Redness. Pain.

Redness. Pain.

Cyclopentanone was detected in 4 of 7 wastewater effluents from energy related processes(1). A groundwater water sample from a coal gasification facility in Hanna, WY contained cyclopentanone at an average concn of 32 ppb; the process water at a coal gasification facility in Gillette, WY contained cyclopentanone at an average concn of 110 ppb; effluent from the gasification of Rosebud coal in Morgantown, WV contained cyclopentanone at an average concn of 56 ppb; and retort water from an in situ shale oil processing facility in Rock Spring, WY contained cyclopentanone at an average concn of 5 ppb(1). Wastewater from coal gasification at the Grand Fork's Energy Technology Center, ND was also reported to contain cyclopentanone at a concn of 0.8 mg/L(2). In addition, wastewater effluent from a shale oil facility in Queensland, Australia was shown to contain cyclopentanone at a concn of 53 mg/L(3).

/PRODUCES CNS DEPRESSION/ IN HIGH CONCN.

25 MMOLAR CYCLOPENTANONE INCUBATED WITH /HUMAN LUNG FIBROBLAST/ CELLS FOR 30 MIN AT 37 °C SHOWED NO SIGNS OF ACTIVE MEMBRANE DAMAGE.

Cyclopentanone may be released to the environment via effluents at sites where it is produced or used as an intermediate for pharmaceuticals, biologicals, insecticides and rubber chemicals(4). Cyclopentanone is also released to the environment via effluents from the manufacture and use of coal-derived liquid fuels and the disposal of coal liquefaction and gasification waste byproducts(1-3).

Pure culture studies showed various isolated species of bacteria(1,2) and yeast(3) were unable to utilize cyclopentanone as a single carbon source. A single 5-day BOD screening test, which utilized activated sludge for inocula, indicates cyclopentanone biodegraded rapidly with acclimation(4). After a 20 day acclimation period. 95.4% COD of an initial concn of 100 mg/L was removed in a closed bottle maintained at 20 °C and a pH of 7.2(4).

Based upon an estimated log kow of 0.24(1), the bioconcentration factor (log BCF) for cyclopentanone has been calculated to be -0.05, from a recommended regression-derived equations(2). This BCF value indicates cyclopentanone should not bioconcentrate in aquatic organisms(SRC).