MSDS Name:   Tetrahydropyran, 99+%
Synonym:   THP.
Company:   AboutChem.com

**** SECTION 2 - COMPOSITION, INFORMATION ON INGREDIENTS ****

+----------------+--------------------------------------+----------+-----------+
| CAS# | Chemical Name | % | EINECS# |
|----------------|--------------------------------------|----------|-----------|
| 142-68-7 |Tetrahydropyran | 99+% | 205-552-8 |
+----------------+--------------------------------------+----------+-----------+
Hazard Symbols: F
Risk Phrases: 11 19 9

**** SECTION 3 - HAZARDS IDENTIFICATION ****

EMERGENCY OVERVIEW
Highly flammable. May form explosive peroxides. Explosive when mixed
with combustible material.Highly flammable.

Potential Health Effects
Eye:
May cause blindness. May cause permanent corneal opacification.
May cause chemical conjunctivitis and corneal damage.
Skin:
May cause skin irritation and possible burns. May cause cyanosis of
the extremities.
Ingestion:
May cause gastrointestinal irritation with nausea, vomiting and
diarrhea. May cause cardiac disturbances. Ingestion of large amounts
may cause CNS depression.
Inhalation:
May cause respiratory tract irritation. Aspiration may lead to
pulmonary edema. Vapors may cause dizziness or suffocation. May cause
cardiac abnormalities. May cause burning sensation in the chest.
Chronic:
Effects may be delayed.

**** SECTION 4 - FIRST AID MEASURES ****

Eyes:
Immediately flush eyes with plenty of water for at least 15 minutes,
occasionally lifting the upper and lower eyelids. Get medical aid
immediately.
Skin:
Get medical aid. Flush skin with plenty of water for at least 15
minutes while removing contaminated clothing and shoes.
Ingestion:
Never give anything by mouth to an unconscious person. Get medical
aid. Do NOT induce vomiting. If conscious and alert, rinse mouth and
drink 2-4 cupfuls of milk or water.
Inhalation:
Get medical aid immediately. Remove from exposure and move to fresh
air immediately. If breathing is difficult, give oxygen. Do NOT use
mouth-to-mouth resuscitation. If breathing has ceased apply
artificial respiration using oxygen and a suitable mechanical device
such as a bag and a mask.
Notes to Physician:

**** SECTION 5 - FIRE FIGHTING MEASURES ****

General Information:
As in any fire, wear a self-contained breathing apparatus in
pressure-demand, MSHA/NIOSH (approved or equivalent), and full
protective gear. Vapors may form an explosive mixture with air.
Vapors can travel to a source of ignition and flash back. During a
fire, irritating and highly toxic gases may be generated by thermal
decomposition or combustion. Will burn if involved in a fire. Use
water spray to keep fire-exposed containers cool. Flammable liquid
and vapor. May form explosive peroxides. Vapors may be heavier than
air. They can spread along the ground and collect in low or
confined areas. May accelerate burning if involved in a fire.
Containers may explode when heated. Runoff from fire control or
dilution water may cause pollution.
Extinguishing Media:
For small fires, use dry chemical, carbon dioxide, water spray or
alcohol-resistant foam. Water may be ineffective. Do NOT use
straight streams of water. Cool containers with flooding quantities
of water until well after fire is out. For large fires flood fire
with water from a distance. For large fires, use dry chemical, carbon
dioxide, water spray, or regular foam.

**** SECTION 6 - ACCIDENTAL RELEASE MEASURES ****

General Information: Use proper personal protective equipment as indicated
in Section 8.
Spills/Leaks:
Absorb spill with inert material (e.g. vermiculite, sand or earth),
then place in suitable container. Avoid runoff into storm sewers and
ditches which lead to waterways. Clean up spills immediately,
observing precautions in the Protective Equipment section. Remove all
sources of ignition. Use a spark-proof tool. Isolate area and deny
entry. Provide ventilation. Place under an inert atmosphere. Do not
use combustible materials such as paper towels to clean up spill. A
vapor suppressing foam may be used to reduce vapors.

**** SECTION 7 - HANDLING and STORAGE ****

Handling:
Wash thoroughly after handling. Remove contaminated clothing and
wash before reuse. Use only in a well-ventilated area. Ground and
bond containers when transferring material. Use spark-proof tools and
explosion proof equipment. Avoid contact with eyes, skin, and
clothing. Empty containers retain product residue, (liquid and/or
vapor), and can be dangerous. Keep container tightly closed. Keep
away from heat, sparks and flame. Avoid ingestion and inhalation. If
peroxide formation is suspected, do not open or move container.
Avoid contact with air and sunlight. Do not pressurize, cut, weld,
braze, solder, drill, grind, or expose empty containers to heat,
sparks or open flames. Unused chemicals should not be returned to
the container. Do not distill since this removes
peroxide-inhibitors.
Storage:
Keep away from sources of ignition. Do not store in direct sunlight.
Store in a tightly closed container. Flammables-area. Regularly check
inhibitor levels to maintain peroxide levels below 1%. Do not break
the seal on the container until it is needed. Label the container
with the date it was first opened. Long-term storage is not
recommended.

**** SECTION 8 - EXPOSURE CONTROLS, PERSONAL PROTECTION ****

Engineering Controls:
Facilities storing or utilizing this material should be equipped
with an eyewash facility and a safety shower. Use adequate
ventilation to keep airborne concentrations low.
Exposure Limits
CAS# 142-68-7:


Personal Protective Equipment

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 and clothing to
prevent skin exposure.
Clothing:
Wear appropriate protective clothing to minimize
contact with skin.
Respirators:
Follow the OSHA respirator regulations found in 29
CFR 1910.134 or European Standard EN 149. Use a
NIOSH/MSHA or European Standard EN 149 approved
respirator if exposure limits are exceeded or if
irritation or other symptoms are experienced.

**** SECTION 9 - PHYSICAL AND CHEMICAL PROPERTIES ****

Physical State: Liquid
Color: clear, colorless
Odor: None reported.
pH: Not available.
Vapor Pressure: Not available.
Viscosity: Not available.
Boiling Point: 88 deg C @ 760.00mm Hg
Freezing/Melting Point: -45 deg C
Autoignition Temperature: Not applicable.
Flash Point: -15 deg C ( 5.00 deg F)
Explosion Limits, lower: Not available.
Explosion Limits, upper: Not available.
Decomposition Temperature:
Solubility in water: 80 G/L (25C)
Specific Gravity/Density: .8810g/cm3
Molecular Formula: C5H10O
Molecular Weight: 86.13

**** SECTION 10 - STABILITY AND REACTIVITY ****

Chemical Stability:
Stable under normal temperatures and pressures. On long term
storage, substances with similar functional groups form explosive
peroxides. Explosive peroxides may form on concentration. Peroxides
can be detonated by friction, impact, or heating. Tends to form
explosive peroxides; especially when anhydrous. Peroxide formation
may occur in containers that have been opened and remain in storage.
Conditions to Avoid:
Incompatible materials, ignition sources, exposure to air, excess
heat, strong oxidants.
Incompatibilities with Other Materials:
Oxidizing agents, strong acids.
Hazardous Decomposition Products:
Carbon monoxide, irritating and toxic fumes and gases, carbon
dioxide.
Hazardous Polymerization: Has not been reported.

**** SECTION 11 - TOXICOLOGICAL INFORMATION ****

RTECS#:
CAS# 142-68-7 unlisted.
LD50/LC50:
Not available.
Carcinogenicity:
Tetrahydropyran -
Not listed by ACGIH, IARC, or NTP.

**** SECTION 12 - ECOLOGICAL INFORMATION ****



**** SECTION 13 - DISPOSAL CONSIDERATIONS ****

Dispose of in a manner consistent with federal, state, and local regulations.

**** SECTION 14 - TRANSPORT INFORMATION ****

IATA
Shipping Name: FLAMMABLE LIQUID, N.O.S.*
Hazard Class: 3
UN Number: 1993
Packing Group: II
IMO
Shipping Name: FLAMMABLE LIQUID, N.O.S.
Hazard Class: 3.2
UN Number: 1993
Packing Group: II
RID/ADR
Shipping Name: FLAMMABLE LIQUID, N.O.S.
Hazard Class: 3
UN Number: 1993
Packing group: II

**** SECTION 15 - REGULATORY INFORMATION ****

European/International Regulations
European Labeling in Accordance with EC Directives
Hazard Symbols: F
Risk Phrases:
R 11 Highly flammable.
R 19 May form explosive peroxides.
R 9 Explosive when mixed with combustible material.
Safety Phrases:
S 9 Keep container in a well-ventilated place.
S 16 Keep away from sources of ignition - No
smoking.
S 28A After contact with skin, wash immediately with
plenty of water.
S 33 Take precautionary measures against static
discharges.
S 37 Wear suitable gloves.
S 45 In case of accident or if you feel unwell, seek
medical advice immediately (show the label where
possible).
WGK (Water Danger/Protection)
CAS# 142-68-7: No information available.
Canada
CAS# 142-68-7 is listed on Canada's DSL List.
CAS# 142-68-7 is not listed on Canada's Ingredient Disclosure List.
US FEDERAL
TSCA
CAS# 142-68-7 is listed on the TSCA inventory.

**** SECTION 16 - ADDITIONAL INFORMATION ****

MSDS Creation Date: 9/02/1997 Revision #6 Date: 3/18/2003

The information above is believed to be accurate and represents the best
information currently available to us. However, we make no warranty of
merchantability or any other warranty, express or implied, with respect to
such information, and we assume no liability resulting from its use. Users
should make their own investigations to determine the suitability of the
information for their particular purposes. In no way shall the company be
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damages, howsoever arising, even if the company has been advised of
the possibility of such damages.
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