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MSDS 
:
 Terephthaldehyde monodiethylacetal, 98+% stabilized with 0.1%
CAS 
:
 121-44-8
SYNONYMS 
:
 4-(Diethoxymethyl)benzaldehyde.
**** SECTION 2 - COMPOSITION, INFORMATION ON INGREDIENTS ****

+----------------+--------------------------------------+----------+-----------+
| CAS# | Chemical Name | % | EINECS# |
|----------------|--------------------------------------|----------|-----------|
|----------------|--------------------------------------|----------|-----------|
| 121-44-8 |Triethylamine | 0.1 | 204-469-4 |
|----------------|--------------------------------------|----------|-----------|
| 81172-89-6 |Terephthaldehyde monodiethylacetal | 98 | unlisted |
+----------------+--------------------------------------+----------+-----------+
Text for R-phrases: see Section 16
Hazard Symbols: None Listed.
Risk Phrases: None Listed.

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

EMERGENCY OVERVIEW
Hygroscopic (absorbs moisture from the air).The toxicological
properties of this material have not been fully investigated.

Potential Health Effects
Eye:
May cause eye irritation.
Skin:
May cause skin irritation.
Ingestion:
May cause gastrointestinal irritation with nausea, vomiting and
diarrhea. The toxicological properties of this substance have not
been fully investigated.
Inhalation:
May cause respiratory tract irritation. The toxicological properties
of this substance have not been fully investigated.
Chronic:
No information found.

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

Eyes:
Flush eyes with plenty of water for at least 15 minutes,
occasionally lifting the upper and lower eyelids. Get medical aid.
Skin:
Get medical aid immediately. Flush skin with plenty of water for at
least 15 minutes while removing contaminated clothing and shoes.
Wash clothing before reuse.
Ingestion:
Never give anything by mouth to an unconscious person. Get medical
aid immediately. 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 not breathing, give artificial respiration. If
breathing is difficult, give oxygen.
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. During a fire, irritating and highly toxic gases
may be generated by thermal decomposition or combustion.
Extinguishing Media:
In case of fire, use water, dry chemical, chemical foam, or
alcohol-resistant 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. Clean up spills immediately,
observing precautions in the Protective Equipment section. Provide
ventilation.

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

Handling:
Wash thoroughly after handling. Remove contaminated clothing and
wash before reuse. Avoid contact with eyes, skin, and clothing. Avoid
ingestion and inhalation. Use with adequate ventilation.
Storage:
Keep container closed when not in use. Store in a tightly closed
container. Store protected from moisture. Store in a cool, dry area
away from incompatible substances.

**** 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# 121-44-8:
United Kingdom, WEL - TWA: 2 ppm TWA; 8 mg/m3 TWA
United Kingdom, WEL - STEL: 4 ppm STEL; 17 mg/m3 STEL
United States OSHA: 25 ppm TWA; 100 mg/m3 TWA
Belgium - TWA: 1 ppm VLE; 4.2 mg/m3 VLE
Belgium - STEL: 3 ppm VLE; 12.6 mg/m3 VLE
France - VLE: 10 ppm VLE; 40 mg/m3 VLE
Germany: 1 ppm TWA; 4.2 mg/m3 TWA
Germany: Skin absorber
Malaysia: 1 ppm TWA; 4.1 mg/m3 TWA
Netherlands: 10 ppm STEL; 40 mg/m3 STEL
Netherlands: 5 ppm MAC; 20 mg/m3 MAC
Russia: 10 mg/m3 TWA
Spain: 2 ppm VLA-ED; 8.4 mg/m3 VLA-ED
Spain: 3 ppm VLA-EC; 12.6 mg/m3 VLA-EC
CAS# 81172-89-6:


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 gloves to prevent skin exposure.
Clothing:
Wear appropriate clothing to prevent skin exposure.
Respirators:
A respiratory protection program that meets OSHA's 29
CFR 1910.134 and ANSI Z88.2 requirements or European
Standard EN 149 must be followed whenever workplace
conditions warrant respirator use.

**** 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: 89 - 93 deg C @ 0.7 mmHg
Freezing/Melting Point: Not available.
Autoignition Temperature: Not available.
Flash Point: > 112 deg C (> 233.60 deg F)
Explosion Limits, lower: Not available.
Explosion Limits, upper: Not available.
Decomposition Temperature:
Solubility in water: decomposes
Specific Gravity/Density: 1.04 g/cm3
Molecular Formula: C12H16O3
Molecular Weight: 208.26

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

Chemical Stability:
Stable under normal temperatures and pressures.
Conditions to Avoid:
Moisture, excess heat.
Incompatibilities with Other Materials:
Strong 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# 121-44-8: YE0175000
CAS# 81172-89-6 unlisted.
LD50/LC50:
CAS# 121-44-8: Inhalation, mouse: LC50 = 6 gm/m3; Oral, mouse: LD50
= 546 mg/kg; Oral, rat: LD50 = 460 mg/kg; Skin, rabbit: LD50 = 570
uL/kg.
CAS# 81172-89-6.
Carcinogenicity:
Triethylamine -
Not listed by ACGIH, IARC, or NTP.
Terephthaldehyde monodiethylacetal -
Not listed by ACGIH, IARC, or NTP.
Other:
See actual entry in RTECS for complete information.

**** 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: Not regulated.
Hazard Class:
UN Number:
Packing Group:
IMO
Shipping Name: Not regulated.
Hazard Class:
UN Number:
Packing Group:
RID/ADR
Shipping Name: Not regulated.
Hazard Class:
UN Number:
Packing group:
USA RQ: CAS# 121-44-8: 5000 lb final RQ; 2270 kg final RQ

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

European/International Regulations
European Labeling in Accordance with EC Directives
Hazard Symbols: Not available.
Risk Phrases:
Safety Phrases:
S 24/25 Avoid contact with skin and eyes.
WGK (Water Danger/Protection)
CAS# 121-44-8: 1
CAS# 81172-89-6: No information available.
Canada
CAS# 121-44-8 is listed on Canada's DSL List.
CAS# 121-44-8 is listed on Canada's Ingredient Disclosure List.
CAS# 81172-89-6 is not listed on Canada's Ingredient Disclosure List.
US FEDERAL
TSCA
CAS# 121-44-8 is listed on the TSCA inventory.
CAS# 81172-89-6 is not listed on the TSCA inventory.
It is for research and development use only.

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

Text for R-phrases from Section 2
MSDS Creation Date: 4/21/1998 Revision #3 Date: 4/26/2002

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
liable for any claims, losses, or damages of any third party or for lost
profits or any special, indirect, incidental, consequential or exemplary
damages, howsoever arising, even if the company has been advised of
the possibility of such damages.
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