Cyclopentane

  • Pentamethylene
Formula
C5H10
Structure
Description
Colorless liquid.
Uses
Commonly used for cracking aromatics. Commercially, used to produce a variety of analgesics, sedatives, hypnotics, antitumor agents, cns depressants, prostaglandins, insecticides, and many other products.

Registry Numbers and Inventories.
CAS
287-92-3
EC (EINECS/ELINCS)
206-016-6
EC Index Number
601-030-00-2
EC Class
Highly flammable; Dangerous for the Environment
R 11 52/53
S 9 16 29 33 61
RTECS
GY2390000
RTECS class
Other
UN (DOT)
1146
Merck
13,2769
Beilstein/Gmelin
1900195
Beilstein Reference
4-05-00-00014
Swiss Giftliste 1
G-1465
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C5H10
Formula mass
70.13
Melting point, °C
-93.3
Boiling point, °C
49
Vapor pressure, mmHg
318 (20 C)
Vapor density (air=1)
2.4
Saturation Concentration
53% (530000 ppm) at 31 C (calculated)
Critical temperature
238.6
Critical pressure
44.4
Density
0.746 G/CM3 (20 C)
Solubility in water
Insoluble
Viscosity
0.44 cp @ 20C
Surface tension
23 g/s2
Refractive index
1.4068 (20 C)
Dielectric constant
1.9 (20 C)
Partition coefficient, pKow
3.00
Heat of fusion
0.60 kJ/mol
Heat of vaporization
28.5 kJ/mol
Heat of combustion
-3322 kJ/mol

Hazards and Protection.
Storage
Keep away from sources of ignition. Store in a tightly closed container. Flammables-area.
B2
Handling
Wash thoroughly after handling. Use only in a well ventilated area. Ground and bond containers when transferring material. Avoid contact with eyes, skin, and clothing. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Avoid contact with heat, sparks and flame. Avoid ingestion and inhalation. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames.
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. Remove all sources of ignition.
Disposal code
1
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents
Decomposition
Carbon monoxide, carbon dioxide.

Fire.
Flash Point,°C
-42
Autoignition, °C
380
Upper exp. limit, %
8.7
Lower exp. limit, %
1.5
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Extremely flammable. Material will readily ignite at room temperature. Extinguishing media: Use water spray to cool fire-exposed containers. Use foam, dry chemical, or carbon dioxide.
Fire potential
Flammable, dangerous fire risk.
Hazards
Containers may explode.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.
Health
1
 
Flammability
3
 
 
Reactivity
0
 

Health.
Exposure limit(s)
TLV: 600 ppm; 1720 mg/m3 (as TWA) (ACGIH 1993-1994). NIOSH REL: TWA 600 ppm (1720 mg/m3)
Poison_Class
-
Exposure effects
CNS depression and dizziness may be expected after exposure to moderate to high concentrations of the vapor.
   Ingestion
May cause irritation of the digestive tract. May cause central nervous system depression.
   Inhalation
Inhalation of high concentrations may cause central nervous system effects characterized by headache, dizziness, unconsciousness and coma. May cause respiratory tract irritation. May cause drowsiness, unconsciousness, and central nervous system depression.
   Skin
May cause skin irritation.
   Eyes
May cause 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. Possible aspiration hazard. 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.
   Skin
Get medical aid if irritation develops or persists. Flush skin with plenty of soap and water.
   Eyes
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Transport.
UN number
1146
Response guide
Hazard class
3
Packing Group
II
 
USCG CHRIS Code
CYP
 
HS Code
2902 19 90
 
Std. Transport #
4908135
 
IMO Chemical Code
17
IMO Pollution Category
C
IMO Hazard code
P