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MSDS 
:
 Molybdenum(VI) oxide
CAS 
:
 1313-27-5
SYNONYMS 
:
 Molybdic oxide; Molybdenum trioxide; Molybdic acid anhydride;     Molybdic anhydride; Molybdenum oxide (MoO3).
**** SECTION 2 - COMPOSITION, INFORMATION ON INGREDIENTS ****

+----------------+--------------------------------------+----------+-----------+
| CAS# | Chemical Name | % | EINECS# |
|----------------|--------------------------------------|----------|-----------|
| 1313-27-5 |Molybdenum trioxide | >99 | 215-204-7 |
+----------------+--------------------------------------+----------+-----------+
Hazard Symbols: XN
Risk Phrases: 36/37 48/20/22

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

EMERGENCY OVERVIEW
Irritating to eyes and respiratory system. Harmful : danger of
serious damage to health by prolonged exposure through inhalation and
if swallowed.

Potential Health Effects
Eye:
Causes eye irritation.
Skin:
May cause skin irritation.
Ingestion:
May cause irritation of the digestive tract. Ingestion of large
amounts of molybdenum may cause appetite loss, fatigue, and
diarrhea.
Inhalation:
Causes respiratory tract irritation.
Chronic:
Aerosols of water-soluble molybdenum compounds can affect the
respiratory tract if inhaled. Animal data from chronic inhalation
studies have shown inflammatory changes in the lungs of rats, with
cellular aggregates resembling nodules, which are consistent with
some of the earlier clinical reports of lung problems among exposed
workers. Data from a NTP study indicate that molybdenum trioxide, a
soluble compound, is a likely animal carcinogen.

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

Eyes:
In case of contact, immediately flush eyes with plenty of water for
at least 15 minutes. Get medical aid.
Skin:
In case of contact, flush skin with plenty of water. Remove
contaminated clothing and shoes. Get medical aid if irritation
develops and persists. Wash clothing before reuse.
Ingestion:
If swallowed, do not induce vomiting unless directed to do so by
medical personnel. Never give anything by mouth to an unconscious
person. Get medical aid.
Inhalation:
If inhaled, remove to fresh air. 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. Substance is noncombustible.
Extinguishing Media:
For small fires, use water spray, dry chemical, carbon dioxide or
chemical foam.

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

General Information: Use proper personal protective equipment as indicated
in Section 8.
Spills/Leaks:
Vacuum or sweep up material and place into a suitable disposal
container. Clean up spills immediately, observing precautions in the
Protective Equipment section. Avoid generating dusty conditions.
Provide ventilation.

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

Handling:
Wash thoroughly after handling. Use with adequate ventilation.
Minimize dust generation and accumulation. Avoid contact with eyes,
skin, and clothing. Keep container tightly closed. Do not breathe
dust.
Storage:
Store in a cool, dry, well-ventilated area away from incompatible
substances. Keep containers tightly closed.

**** 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 general or
local exhaust ventilation to keep airborne concentrations below the
permissible exposure limits.
Exposure Limits
CAS# 1313-27-5:
United Kingdom, WEL - TWA: (listed as molybdenum soluble compound
5 mg/m3 TWA (as Mo)
United Kingdom, WEL - STEL: (listed as molybdenum soluble compoun
10 mg/m3 STEL (as Mo)
United States OSHA: 5 mg/m3 TWA (as Mo) (listed under Molybdenum
soluble compounds).
Belgium - TWA: (listed as molybdenum soluble compounds): 5 mg/m3
(as Mo)
France - VME: (listed as molybdenum soluble compounds): 5 mg/m3 V
(as Mo)
France - VLE: (listed as molybdenum soluble compounds): 10 mg/m3
(as Mo)
Germany: (listed as molybdenum soluble compounds): 5 mg/m3 VME (a
Mo)
Malaysia: (listed as molybdenum soluble compounds): 5 mg/m3 TWA (
Mo)
Netherlands: (listed as molybdenum soluble compounds): 5 mg/m3 MA
(as Mo)
Russia: (listed as molybdenum soluble compounds): 2 mg/m3 TWA (as
Spain: (listed as molybdenum soluble compounds): 5 mg/m3 VLA-ED (
Mo)

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: yellow to green
Odor: odorless
pH: Not available.
Vapor Pressure: Not available.
Viscosity: Not available.
Boiling Point: 1155 deg C @ 760 mmHg
Freezing/Melting Point: 795 deg C
Autoignition Temperature: Not available.
Flash Point: Not applicable.
Explosion Limits, lower: Not available.
Explosion Limits, upper: Not available.
Decomposition Temperature:
Solubility in water: Soluble.
Specific Gravity/Density: 4.6900 g/cm3
Molecular Formula: MoO3
Molecular Weight: 143.94

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

Chemical Stability:
Stable under normal temperatures and pressures.
Conditions to Avoid:
Dust generation.
Incompatibilities with Other Materials:
Bromine pentafluoride, chlorine trifluoride, lithium, magnesium,
potassium, sodium, acids.
Hazardous Decomposition Products:
Oxides of molybdenum.
Hazardous Polymerization: Has not been reported.

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

RTECS#:
CAS# 1313-27-5: QA4725000
LD50/LC50:
CAS# 1313-27-5: Inhalation, rat: LC50 = >5840 mg/m3/4H; Oral, rat:
LD50 = 2689 mg/kg; Skin, rat: LD50 = >2 gm/kg.
Carcinogenicity:
Molybdenum trioxide -
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: 6.1
UN Number:
Packing group: III

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

European/International Regulations
European Labeling in Accordance with EC Directives
Hazard Symbols: XN
Risk Phrases:
R 36/37 Irritating to eyes and respiratory system.
R 48/20/22 Harmful : danger of serious damage to
health by prolonged exposure through inhalation and if
swallowed.
Safety Phrases:
S 22 Do not breathe dust.
S 25 Avoid contact with eyes.
WGK (Water Danger/Protection)
CAS# 1313-27-5: 1
Canada
CAS# 1313-27-5 is listed on Canada's DSL List.
CAS# 1313-27-5 is listed on Canada's Ingredient Disclosure List.
US FEDERAL
TSCA
CAS# 1313-27-5 is listed on the TSCA inventory.

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

MSDS Creation Date: 4/05/1997 Revision #4 Date: 3/03/2005

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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Molybdenum(VI) oxide 1313-27-5
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Tetrabromo-O-Sulfobenzoic Acid Cyclic Anhydride, 95% 68460-01-5
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Methyl-alpha-D-galacatopyranoside, 98+% 3396-99-4
Morpholine, Reagent ACS, 99+% (Titr.) 110-91-8
N-Acetyl-L-Cysteine, 98% 616-91-1
N-Amyl Acetate, P.A. 628-63-7
1-Pentanol, 99% 71-41-0
(2-Hydroxyethyl)triphenylphosphonium chloride, 98% 23250-03-5
3-Indoxyl sulfate potassium salt 2642-37-7
Indoxyl-beta-D-glucuronide cyclohexylammonium salt 35804-66-1
n-Butyl acetate, spectrophotometric grade, 99+% 123-86-4
alpha-D-Galactose 1-phosphate dipotassium salt pentahydrate 19046-60-7
Glycine-7-amido-4-methylcoumarin hydrobromide 113728-13-5
N-Acetyl-L-tyrosine ethyl ester monohydrate, 99% 840-97-1
5-Bromo-6-Chloro-3-Indolyl-Beta-D-Galactopyranoside 93863-88-8
5-Bromo-4-Chloro-3-Indolyl-Beta-D-Glucuronide Cyclohexylammonium Salt 18656-96-7
5-Bromo-6-Chloro-3-Indolyl Phosphate p-Toluidine Salt 6769-80-8
L-Alanine-4-Methyl-7-Coumarinylamide Trifluoroacetate 96594-10-4
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(S)-(+)-gamma-(Trityloxymethyl)-gamma-butyrolactone, 96% 73968-62-4
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(R)-(+)-2-Hydroxy-1,2,2-triphenylethyl acetate, 99% 95061-47-5
(S)-(-)-2-Hydroxy-1,2,2-triphenylethyl acetate, 99% 95061-51-1
(-)-Bis[(S)-1-phenylethyl]amine hydrochloride, 99% 40648-92-8
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(4S,5R)-(-)-4-Methyl-5-phenyl-2-oxazolidinone, 99% 16251-45-9
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N-Isopropylethylenediamine, 98% 19522-67-9
Ammonium Acetate 631-61-8
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