Cyclopropane

  • Trimethylene
Formula
C3H6
Structure
Description
A colorless liquid. Characteristic odor resembling the odor of petroleum ether.
Uses
Organic synthesis.

Registry Numbers and Inventories.
CAS
75-19-4
EC (EINECS/ELINCS)
200-847-8
EC Index Number
601-016-00-6
EC Class
Extremely flammable
RTECS
GZ0690000
RTECS class
Tumorigen; Mutagen
UN (DOT)
1027
Merck
12,2817
Beilstein/Gmelin
605256
Beilstein Reference
4-05-00-00003
Swiss Giftliste 1
G-1467
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C3H6
Formula mass
42.08
Melting point, °C
-127.4
Boiling point, °C
-76
Vapor pressure, mmHg
1800 (3 C)
Vapor density (air=1)
1.88
Critical temperature
124.7
Critical pressure
54.2
Density
0.784 g/cm3 (-101 C)
Solubility in water
Slightly soluble
Viscosity
0.0088 (20 C)
Surface tension
22 g/s2
Refractive index
1.3799 (-42 C)
Partition coefficient, pKow
1.72
Heat of fusion
5.4 kJ/mol
Heat of vaporization
20.1 kJ/mol
Heat of combustion
-2093 kJ/mol

Hazards and Protection.
Storage
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protection
Wear appropriate protective gloves, clothing and goggles. Always wear thermal protective clothing when handling refrigerated/cryogenic liquids.
Respirators
Self-contained breathing apparatus for high concentration of vapor; safety goggles or face shield.
Small spills/leaks
ELIMINATE all ignition sources (no smoking, flares, sparks or flames in immediate area). All equipment used when handling the product must be grounded. Do not touch or walk through spilled material. Stop leak if you can do it without risk. If possible, turn leaking containers so that gas escapes rather than liquid. Use water spray to reduce vapors or divert vapor cloud drift. Avoid allowing water runoff to contact spilled material. Do not direct water at spill or source of leak. Prevent spreading of vapors through sewers, ventilation systems and confined areas. Isolate area until gas has dispersed. CAUTION: When in contact with refrigerated/cryogenic liquids, many materials become brittle and are likely to break without warning.
Stability
No data.
Incompatibilities
Incompatible with strong oxidizing agents such as nitric acid Mixtures with oxygen or air may explode.
Decomposition
When heated to decomposition it emits acrid smoke and fumes.

Fire.
Flash Point,°C
-94
Autoignition, °C
498
Upper exp. limit, %
10.4
Lower exp. limit, %
2.4
Fire fighting
DO NOT EXTINGUISH A LEAKING GAS FIRE UNLESS LEAK CAN BE STOPPED. SMALL FIRES: Dry chemical or carbon dioxide. LARGE FIRES: Water spray or fog. Move containers from fire area if you can do it without risk. FIRE INVOLVING TANKS: Fight fire from maximum distance or use unmanned hose holders or monitor nozzles. Cool containers with flooding quantities of water until well after fire is out. Do not direct water at source of leak or safety devices; icing may occur. Withdraw immediately in case of rising sound from venting safety devices or discoloration of tank. ALWAYS stay away from tanks engulfed in fire. For massive fire, use unmanned hose holders or monitor nozzles; if this is impossible, withdraw from area and let fire burn.
Fire potential
EXTREMELY FLAMMABLE.
Hazards
Vapors from liquefied gas are initially heavier than air and spread along ground. Vapors may travel to source of ignition and flash back. Containers may explode when heated. Ruptured cylinders may rocket.
Health
1
 
Flammability
4
 
 
Reactivity
0
 

Health.
Poison_Class
4
Exposure effects
Rapid breathing and rapid heart rate are common. In severe cases abnormally low blood pressure, apnea, and cardiac arrest develop. Various disturbances including headache, dizziness, mood disturbances, numbness of the extremities, sleepiness, mental confusion, poor judgement and coordination, and memory loss may occur. Prolonged or severe hypoxia results in unconsciousness. Prolonged asphyxia may produce CNS injury. Hemiparesis has been reported with volatile substance abuse. Cerebral edema with brainstem herniation may occur. Seizures have been reported following intentional inhalation.
   Ingestion
Nausea, vomiting, and gastrointestinal hemorrhage may develop.
   Inhalation
Hyperventilation may develop.
   Skin
Dermal exposure may cause frostbite injury. Severe tissue burns have been reported.
   Eyes
Decreases in night vision, visual acuity, and visual fields (tunnel vision) may occur. Frothy mucous may be seen.

First aid
 
   Ingestion
Seek medical assistance.
   Inhalation
Remove promptly to fresh air; if symptoms of asphyxia- tion persist, administer artificial respiration and oxygen; treat symptomatically thereafter.
   Skin
Rewarming and a variety of topical treatments are indicated for frostbite injury. See main section for more information.
   Eyes
Irrigate exposed eyes with copious amounts of tepid water for at least 15 minutes. If irritation, pain, swelling, lacrimation, or photophobia persist, the patient should be seen in a health care facility.

Transport.
UN number
1027
Response guide
Hazard class
2.1
USCG CHRIS Code
CPR
 
Std. Transport #
4905713