A colorless gas with a faint petroleum like odor. For transportation it may be stenched.
In polymerized form as polypropylene plastic, raw material in manufacture of acetone, isopropylbenzene, isopropyl halides.
Registry Numbers and Inventories.
EC Index Number
Swiss Giftliste 1
Japan ENCS (MITI)
Melting point, °C
Boiling point, °C
Vapor pressure, mmHg
5940 (10 C)
Vapor density (air=1)
Odor Threshold Odor threshold 17.3 mg/m3
0.6513 g/cm3 (-80 C)
Solubility in water
44.6 ml/100 ml
0.35 cp (-95 C)
18.93 g/s2 (-62 C)
1.3567 (20 C)
1.87 (25 C)
Partition coefficient, pKow
0.0027/K at -47 C
Heat of fusion
Heat of vaporization
Heat of combustion
Hazards and Protection.
Protect cylinders from physical damage. Store in cool, dry, well-ventilated area of non combustible construction away from heavily trafficked areas and emergency exits. Do not allow the temperature where cylinders are stored to exceed 52C. Cylinders must be stored upright and firmly secured to prevent falling or being knocked over. Full and empty cylinders should be segregated. Use a first in - first out inventory system to prevent full cylinders being stored for excessive periods of time.
A B1 D2B
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.
Organic vapor canister or air supplied mask; goggles or face shield (for liquid) protective clothing (for liquid). Plastic or neoprene coated canvas gloves should be worn where liquid propylene is handled.
Wear positive pressure self-contained breathing apparatus (SCBA).
Keep sparks, flames, and other sources of ignition away. Keep material out of water sources and sewers. Attempt to stop leak if without undue personnel hazard. Use water spray to knock-down vapors.
Will explode if ignited in confined area reactive under confinement.
Upper exp. limit, %
Lower exp. limit, %
Do not extinguish fire unless flow can be stopped. Use water in flooding quantities as fog. Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible.
Very flammable, combustion imminent.
Containers may explode. Vapor is heavier than air and may travel considerable distance to a source of ignition and flash back.
Combustion products of propylene including carbon dioxide and carbon monoxide.
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.
Unlikely route of exposure.
Moderate concentrations so as to exclude an adequate supply of oxygen to the lungs cause dizziness, drowsiness, and eventual unconsciousness. It is also a narcotic which acts as a depressant on the central nervous system.
Dermal exposure may cause frostbite injury. Severe tissue burns have been reported.
Decreases in night vision, visual acuity, and visual fields (tunnel vision) may occur. Frothy mucous may be seen.
This compound is a gas, therefore inhalation is the first route of exposure.
IMMEDIATELY leave the contaminated area; take deep breaths of fresh air. If symptoms (such as wheezing, coughing, shortness of breath, or burning in the mouth, throat, or chest) develop, call a physician and be prepared to transport the victim to a hospital. Provide proper respiratory protection to rescuers entering an unknown atmosphere. Whenever possible, Self-Contained Breathing Apparatus (SCBA) should be used.
CAUTION: Exposure of skin to compressed gases may result in freezing of the skin. Treatment for frostbite may be necessary. Remove the victim from the source of contamination. IMMEDIATELY wash affected areas gently with COLD water (and soap, if necessary) while removing and isolating all contaminated clothing. Dry carefully with clean, soft towels. If symptoms such as inflammation or irritation develop, IMMEDIATELY call a physician or go to a hospital for treatment.
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.