Saturday, October 28, 2006
O my god i haven't had a good night rest yesterday. My very good next door neighbour is screaming her way with him! arugh! even my mother can't stand the noise. you know i am those kind of people who will dream of what i can do when i am rich right? But just for this once maybe... if i have the money i would have fixed that door of mine [the lock has been spoiled for years now....why erm i simply knock it off when i got lock outide. the wind blew and my door slam and the best thing is that the key to open the lock is in my room so i have no choice as i am about to go to school i just knock it off. How? with a hammer of coz.] And to sound proof my room! gosh! i goes on every one or two day! i also want to set up a Laser shooting mosquito machines to keep all those irritating mosquito who sneaky bite me at night! So impolite! kk anyway i went online and saw looked out on liquid oxygen seems cool.You wouldn't believe what too much oxygen will do! check it out!
Chemical Name: Liquid Oxygen
Formula: O2
Chemical Family: Oxidizer
Use: Welding, Medical
Synonyms: Oxygen USP, Aviators Breathing Oxygen (ABO)
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NFPA Fire: 0 HMIS Fire: 0 Acute: No
NFPA Health: 3 HMIS Health: 3 Chronic: No
NFPA Reactivity: 0 HMIS Reactivity: 0 Fire: Yes
NFPA Special Hazard: SA Mixture: No Reactive: No
Sudden Release Pressure: Yes
02. INGREDIENTS - COMPOSITION & INFORMATION
PERCENT EXPOSURE GUIDELINES
COMPONENT CAS No. (BY WT.) OSHA - TWA ACGIH - STEL
Oxygen 7782-44-7 99.0% 100.0% None. Simple Asphyxiant
LD50: None. LC50: None.
03. HAZARDS IDENTIFICATION
EMERGENCY OVERVIEW:
Warning: Extremely cold oxidizing liquid and gas under pressure.
Vigorously accelerates combustion.
Combustibles in contact with liquid oxygen may explode on ignition or impact.
Can cause severe frostbite.
Potential Health Effects Information:
Routes of Exposure:
Inhalation: Breathing 80% or more oxygen at atmospheric pressure for more that a few hours
may cause nasal stuffiness, cough , sore throat, chest pain and breathing difficulty.
Breathing oxygen at higher pressure increases the likelihood of adverse effects
within a shorter time period. Breathing pure oxygen under pressure may cause lung
damage and also central nervous system effects resulting in dizziness, poor
coordination, tingling sensation, visual and hearing disturbances, muscular twitching,
unconsciousness and convulsion. Breathing oxygen under pressure may cause
prolongation of adaptation to darkness and reduced peripheral vision.
Eye Contact: Tissue freezing and severe cryogenic burns of eyes.
Skin Contact: Tissue freezing and severe cryogenic burns of skin.
Chronic Effects: None
Medical Conditions Aggravated By None.
Overexposure:
Other Effects Of Overexposure See Section 11 "Toxicological Information".
Carcinogenicity: Oxygen is not listed by NTP, OSHA, or IARC
04. FIRST AID MEASURES
Eye: Incase of splash contamination, immediately flush eyes with plenty of water for at
least 15 minutes. See a physician, preferably an ophthalmologist, immediately.
Inhalation: Move victim to fresh air. Call a physician. The physician should be advised that the
victim has been exposed to a high concentration of oxygen.
Rescue personnel should be aware of the extreme fire hazards associated with
oxygen-enriched atmospheres.
Skin: Remove any clothing that may restrict circulation to frozen area. Do not rub frozen
parts as tissue damage may result. As soon as practical place the affected area in a
warm water bath which has a temperature not to exceed 105°F (40°C). Never use
dry heat. Remove and thoroughly air out contaminated clothing. In case of
massive exposure, remove clothing while showering with warm water. Call a
physician as soon as possible.
Frozen tissue is painless and appears waxy with a possible yellow color. It will
become swollen, painful, and prone to infection when thawed. If the frozen part of
the body has been thawed by the time medical attention has been obtained, cover
the area with dry sterile dressing with a large bulky protective covering.
Ingestion: None.
Note To Physician: Supportive treatment should include immediate sedation, anti-convulsive therapy if
needed, and rest. More detailed information can be found in Section 11
"Toxicological Information"
05. FIRE FIGHTING MEASURES
Flash Point: Not applicable; Gas.
Auto ignition: Not applicable.
Flammable Limits - Lower: Not applicable.
Flammable Limits - Upper: Not applicable.
Extinguishing Media: Oxygen is nonflammable and will accelerate combustion. Use extinguishing media
appropriate for surrounding fire.
Fire Fighting Instructions: Evacuate all personnel from the danger area. If possible, shut off flow of oxygen
which is supporting the fire. Immediately cool containers with water spray form
maximum distance. Do not direct water spray at the container vent. When cool,
move containers from fire area, if without risk. Liquid oxygen when spilled will
vaporize rapidly forming an oxygen-enriched vapor cloud. Evacuate this vapor
cloud area.
Fire And Explosion Hazards: Oxidizing agent, vigorously accelerates combustion. Some materials which are
noncombustible in air will burn in the presence of an oxygen-enriched atmosphere
(over 23%). Oxygen may form explosive compounds when exposed to combustible
materials or oil, grease, and other hydrocarbon materials.
Liquid oxygen, when spilled, will vaporize rapidly, forming an oxygen-rich vapor
cloud. Evacuate this vapor cloud area. Visibility may be obscured in its vapor
cloud.
Upon exposure to intense heat or flame, cylinder will vent rapidly and or rupture
violently. Most cylinders are designed to vent contents when exposed to elevated
temperatures.
Pressure in a container can build up due to heat and it may rupture if pressure relief
devices should fail to function.
Contact with cold liquid or gaseous oxygen may cause frostbite.
Hazardous Combustion Products: None known.
Sensitivity To Static Discharge: Not applicable.
Sensitivity To Mechanical Impact: None.
06. ACCIDENTAL RELEASE MEASURES
Steps to be taken is material is released Evacuate all personnel from the affected area. Shut off source of Oxygen, if
or spilled: possible without risk. Ventilate area or remove leaking containers to a well
ventilated location. Remove sources of heat, ignition and, if possible, separate
combustibles from the leak.
If possible, prevent liquid oxygen from contacting grease, oil, asphalt and other
combustibles. To increase rate of vaporization, spray large amounts of water onto
the spill from an upwind position. Avoid contact with liquid oxygen or cold gas.
07. HANDLING AND STORAGE
Storage: Store and use with adequate ventilation. Do not store in a confined space. Post
"No Smoking or Open Flames" signs in the storage area. Cryogenic containers are
equipped with pressure relief devices to control internal pressure. Under normal
conditions these containers will periodically vent product. Some metals such as
carbon steel may become brittle at low temperatures and will easily fracture.
Prevent entrapment of liquid in closed systems or piping without pressure relief
devices.
Handling: Never allow any unprotected part of the body to touch un-insulated pipes or vessels
which contain cryogenic fluids. The extremely cold metal will cause the flesh to
stick fast and tear when one attempts to withdraw from it.
Do not drop, tip, or roll containers on their side. If user experiences any difficulty
operating container valve discontinue use and contact supplier, Containers of liquid
oxygen should be separated from flammable gas containers by a minimum distance
of 20 ft., or by a barrier of noncombustible material at least 5 ft. high having a fire
resistance rating of 1/2 hour. For additional precautions in using liquid oxygen see
Section 16 - Other Information.
08. EXPOSURE CONTROLS - PERSONAL PROTECTION
Engineering Controls:
Ventilation: Natural or mechanical to prevent oxygen-enriched atmospheres over 21% oxygen.
Personal Protective Equipment (PPE):
Skin Protection:
Clothing: Cotton clothing is recommended for use to prevent static buildup. Long sleeve shirts
and trousers without cuffs.
Eye/Face Protection: Full face shield and safety glasses are recommended.
Shoes: Safety shoes are recommended when handling cylinders.
Gloves: Loose fitting thermal insulated or leather gloves. Gloves must be clean and free of
oil and grease.
Respiratory Protection: Before entering area you must check for flammable and oxygen deficient
atmospheres.
Respirator: None required in general use.
Respirator: Wear a Self contained breathing apparatus (SCBA) or NIOSH/MSHA-approved
(or equivalent) full-face piece airline respirator in the positive pressure mode in
oxygen deficient atmospheres (air purifying respirators will not provide protection).
09. PHYSICAL AND CHEMICAL PROPERTIES
Physical State: Liquid gas
Color: Pale blue
Odor: Odorless
Molecular Weight: 32
Boiling Point: -297.3°F (-183.0°C) @ 1 atm
Specific Gravity: 1.14 At 70°F (21.1°C) @ 1 atm, Air = 1
Freezing/Melting Point: -361.1°F (-218.4°C), @ 1 atm
Vapor Pressure: Not Applicable
Vapor Density: .083 lb./cu ft (1.326 kg/CuM), At 70°F (21.1°C) @ 1 atm
Water Solubility: .0489 Vol./Vol. At 32° F (0°C)
Expansion Ratio: 1-860.5 70°F (21.1°C)
pH: Not Applicable - Gas
Odor Threshold: Not Applicable - Gas
Evaporation Rate: Not Applicable - Gas
Coefficient Of Water/Oil Distribution: Information not available
10. STABILITY AND REACTIVITY
Chemical Stability: Stable.
Conditions To Avoid: None.
Incompatibility With Other Materials: Flammable materials, hydrocarbons such as oils and grease, asphalt, ethers, alcohols,
acids and aldehydes. Oxygen reacts with many materials. Refer to NFPA 491 M
Manual of Hazardous Chemical Reactions.
Hazardous Decomposition Products: None.
Hazardous Polymerization: Will not occur.
11. TOXICOLOGICAL INFORMATION
Other Studies Relevant To Material: At atmospheric concentration and pressure, oxygen poses no toxicity hazards.
Premature infants exposed to high oxygen concentrations may suffer delayed retinal
damage which can progress to retinal detachment and blindness. Retinal damage
may also occur in adults exposed to 100% oxygen for extended periods (24 to 48
hr).
At two or more atmospheres central nervous system (CNS) toxicity occurs.
Symptoms include nausea, vomiting, dizziness or vertigo, muscle twitching, vision
changes, and loss of consciousness and generalized seizures. At three atmospheres,
CNS toxicity occurs in less than two hours, and at six atmospheres in only a few
minutes.
Additional Notes to Physician: Animal studies suggest that the administration of certain drugs, including
phenothiazine drugs and chloroquine, increase the susceptibility to toxicity from
oxygen at high pressures. Animal studies also indicate that vitamin "E" deficiency
may increase susceptibility to oxygen toxicity.
Airway obstruction during high oxygen tension may cause alveolar collapse
following absorption of the oxygen. Similarly, occlusion of the Eustachian tubes may
cause retraction of the eardrum and obstruction of the paranasal sinuses may
produce "vacuum-type" headache.
All individuals exposed for long periods to oxygen at high pressure and who exhibit
overt oxygen toxicity should have ophthalmologic examinations.
Irritancy Of Material: None.
Reproductive Effects: None.
Teratogenicity: None.
Synergistic Materials: None.
Sensitization To Material: None.
Mutagenicity: None.
12. ECOLOGICAL INFORMATION
Additional Information: The atmosphere contains approximately 21% oxygen. No adverse ecological
effects are expected. Oxygen does not contain any Class I or Class II ozone
depleting chemicals (40 CFR Part 82). Oxygen is not listed as a marine pollutant by
DOT (49 CFR Part 171).
13. DISPOSAL CONSIDERATIONS
Waste Disposal Method: Do not attempt to dispose of residual or unused quantities. Return cylinder to
supplier.
Unserviceable cylinders should be returned to the supplier for safe and proper
disposal.
For emergency disposal, discharge slowly to the atmosphere in a well ventilated
area or outdoors.
14. TRANSPORT INFORMATION
DOT/IMO Shipping Name: Oxygen, refrigerated liquid.
Hazard Class: 2.2 (Non Flammable gas.)
Identification Number: UN 1073
PIN: 1073
Product RQ: None.
Shipping Label: Oxygen. An oxygen label may be used for domestic shipment in the United States
and Canada in place of the nonflammable and oxidizer labels, (49 CFR Part 172).
Special Shipping Information: Cylinders should be transported in a secure position, in a well ventilated vehicle.
The transportation of compressed gas cylinders in automobiles or in closed-body
vehicles can present serious hazards and should be discouraged.
Placard (When Required): Nonflammable Gas.
@ 9:13 AM
