Cyclopentanone

  • Ketocyclopentane
  • Adipic ketone
Formula
C5H8O
Structure
Description
A clear colorless liquid with a petroleum-like odor.
Uses
Intermediate for pharmaceuticals, biologicals, insecticides, & rubber chemicals.

Registry Numbers and Inventories.
CAS
120-92-3
EC (EINECS/ELINCS)
204-435-9
EC Index Number
606-025-00-9
EC Class
Flammable; Irritant
R 10 36/38
RTECS
GY4725000
RTECS class
Primary Irritant
UN (DOT)
2245
Merck
13,2771
Beilstein/Gmelin
605573
Beilstein Reference
4-07-00-00005
Swiss Giftliste 1
G-4394
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C5H8O
Formula mass
84.12
Melting point, °C
-58
Boiling point, °C
130 - 131
Vapor pressure, mmHg
10 (25 C)
Vapor density (air=1)
2.3
Critical temperature
351
Critical pressure
45.40
Density
0.941 g/cm3 (20 C)
Solubility in water
Soluble
Viscosity
0.99 cp (30 C)
Surface tension
26.4 g/s2 (85.4 C)
Refractive index
1.4366 (20 C)
Partition coefficient, pKow
0.24
Heat of fusion
7.75 kJ/mol
Heat of vaporization
36.4 kJ/mol

Hazards and Protection.
Storage
Keep away from sources of ignition. Store in a cool, dry place. Store in a tightly closed container. Flammables-area.
Handling
Wash thoroughly after handling. Wash hands before eating. Use with adequate ventilation. Use spark-proof tools and explosion proof equipment. Avoid breathing dust, vapor, mist, or gas. Do not get on skin or in eyes. Avoid ingestion and inhalation.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators
Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Small spills/leaks
Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Clean up spills immediately, using the appropriate protective equipment. Scoop up with a nonsparking tool, then place into a suitable container for disposal. Remove all sources of ignition.
Disposal code
1
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents, strong bases, strong reducing agents, and acids.
Decomposition
Carbon monoxide, carbon dioxide.

Fire.
Flash Point,°C
27
Autoignition, °C
445
Upper exp. limit, %
10.8
Lower exp. limit, %
1.6
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Will burn if involved in a fire. Extinguishing media: Use water spray to cool fire-exposed containers. Use foam, dry chemical, or carbon dioxide. Water may be ineffective.
Fire potential
HIGHLY FLAMMABLE.
Hazards
Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapor explosion hazard indoors, outdoors or in sewers. May polymerize explosively when heated or involved in a fire. Runoff to sewer may create fire or explosion hazard. Containers may explode when heated. Many liquids are lighter than water.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.
Health
2
 
Flammability
3
 
 
Reactivity
0
 

Health.
Poison_Class
5
Exposure effects
Limited studies have generally documented little or no effect of ketones on reproduction in experimental animals. Human data is lacking. 2,5-Hexanedione has an effect on spermatogenesis in male experimental animals.
   Ingestion
May cause gastrointestinal irritation with nausea, vomiting and diarrhea.
   Inhalation
May cause respiratory tract irritation.
   Skin
Causes skin irritation.
   Eyes
Causes severe eye irritation.

First aid
 
   Ingestion
Do NOT induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid.
   Inhalation
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid if cough or other symptoms appear.
   Skin
Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Get medical aid if irritation develops or persists.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

Transport.
UN number
2245
Response guide
Hazard class
3
Packing Group
III
 
HS Code
2914 29 00
 
Std. Transport #
4909222