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MSDS 
:
 Tin (II) Oxide, 99+%, -100 Mesh
CAS 
:
 21651-19-4
SYNONYMS 
:
 Stannous Oxide; Tin Monoxide
**** SECTION 2 - COMPOSITION, INFORMATION ON INGREDIENTS ****

+----------------+--------------------------------------+----------+-----------+
| CAS# | Chemical Name | % | EINECS# |
|----------------|--------------------------------------|----------|-----------|
| 21651-19-4 |TIN (II) OXIDE | >99 | 244-499-5 |
+----------------+--------------------------------------+----------+-----------+
Hazard Symbols: None Listed.
Risk Phrases: None Listed.

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

EMERGENCY OVERVIEW
Air sensitive.

Potential Health Effects
Eye:
May cause eye irritation.
Skin:
May cause skin irritation.
Ingestion:
May cause gastrointestinal irritation with nausea, vomiting and
diarrhea. Ingested inorganic tin exhibits only moderate toxicity due
to poor absorption and rapid tissue turnover. Ingestion of large
amounts may cause gastrointestinal irritation, nausea, cramps,
vomiting and diarrhea. May interfere with various enzyme systems.
Inorganic tin salts may cause systemic effects on the central nervous
system, heart and liver.
Inhalation:
May cause respiratory tract irritation. Inhalation of fumes may
cause metal fume fever, which is characterized by flu-like symptoms
with metallic taste, fever, chills, cough, weakness, chest pain,
muscle pain and increased white blood cell count.
Chronic:
Chronic exposure to tin oxide dusts and fumes may result in
stannosis (benign pneumoconiosis).

**** 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.
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:
Do not induce vomiting. If victim is conscious and alert, give 2-4
cupfuls of milk or water. Never give anything by mouth to an
unconscious person. Get medical aid.
Inhalation:
Remove from exposure and move to fresh air immediately. If not
breathing, give artificial respiration. If breathing is difficult,
give oxygen. Get medical aid.
Notes to Physician:
Treat symptomatically and supportively.

**** 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. Use
extinguishing media appropriate to the surrounding fire. Substance is
noncombustible.
Extinguishing Media:
For small fires, use water spray, dry chemical, carbon dioxide or
chemical foam. Substance is noncombustible; use agent most
appropriate to extinguish surrounding fire.

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

General Information: Use proper personal protective equipment as indicated
in Section 8.
Spills/Leaks:
Clean up spills immediately, observing precautions in the Protective
Equipment section. Sweep up, then place into a suitable container for
disposal. Avoid generating dusty conditions. Provide ventilation.
Place under an inert atmosphere.

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

Handling:
Wash thoroughly after handling. Remove contaminated clothing and
wash before reuse. Use with adequate ventilation. Minimize dust
generation and accumulation. Avoid contact with skin and eyes. Keep
container tightly closed. Avoid ingestion and inhalation. Handle
under an inert atmosphere. Store protected from air.
Storage:
Store in a cool, dry, well-ventilated area away from incompatible
substances. Do not expose to air. Store under an inert atmosphere.

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

Engineering Controls:
Use adequate general or local exhaust ventilation to keep airborne
concentrations below the permissible exposure limits.
Exposure Limits
CAS# 21651-19-4:
United Kingdom, WEL - TWA: (listed as tin inorganic compounds): 2
mg/m3 TWA (except SnH4, as Sn)
United Kingdom, WEL - STEL: (listed as tin inorganic compounds):
mg/m3 STEL (except SnH4, as Sn)
United States OSHA: 2 mg/m3 TWA (as Sn) (listed under Tin inorga
compounds).
Belgium - TWA: (listed as tin inorganic compounds): 2 mg/m3 VLE (
Sn)
Malaysia: (listed as tin inorganic compounds): 2 mg/m3 TWA (as Sn
except tin hydride)
Netherlands: (listed as tin inorganic compounds): 2 mg/m3 MAC (as
Spain: (listed as tin inorganic compounds): 2 mg/m3 VLA-ED (as Sn

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 to prevent skin
exposure.
Clothing:
Wear appropriate protective clothing to prevent skin
exposure.
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: Powder
Color: silver-gray
Odor: None reported
pH: Not available.
Vapor Pressure: Negligible.
Viscosity: Not available.
Boiling Point: Not available.
Freezing/Melting Point: 1080 deg C
Autoignition Temperature: Not available.
Flash Point: Not available.
Explosion Limits, lower: N/A
Explosion Limits, upper: N/A
Decomposition Temperature:
Solubility in water: insoluble in alcohol
Specific Gravity/Density:
Molecular Formula: OSn
Molecular Weight: 134.69

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

Chemical Stability:
Stable under normal temperatures and pressures.
Conditions to Avoid:
High temperatures, incompatible materials, dust generation, exposure
to air.
Incompatibilities with Other Materials:
Strong oxidizing agents.
Hazardous Decomposition Products:
Irritating and toxic fumes and gases, tin/tin oxides.
Hazardous Polymerization: Has not been reported.

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

RTECS#:
CAS# 21651-19-4: XQ3700000
LD50/LC50:
Not available.
Carcinogenicity:
TIN (II) OXIDE -
Not listed by ACGIH, IARC, or NTP.
Other:
See actual entry in RTECS for complete information.

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

Other
No information available.

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

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

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

IATA
Not regulated as a hazardous material.
IMO
Not regulated as a hazardous material.
RID/ADR
Not regulated as a hazardous material.

**** 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# 21651-19-4: No information available.
Canada
CAS# 21651-19-4 is listed on Canada's DSL List.
CAS# 21651-19-4 is not listed on Canada's Ingredient Disclosure List.
US FEDERAL
TSCA
CAS# 21651-19-4 is listed on the TSCA inventory.

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

MSDS Creation Date: 6/21/1999 Revision #2 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
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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