MSDS Number: Z3705 * * * * * Effective Date: 08/20/08 * * * * *
Supercedes: 12/05/05

ZINC OXIDE

1. Product Identification

Synonyms: Chinese white; zinc white; flowers of zinc;
calamine
CAS No.: 1314-13-2
Molecular Weight: 81.38

Chemical Formula: ZnO
Product Codes:
J.T. Baker:
4358, 4360, 5070
Mallinckrodt: 3419, 7030, 8824, 8825, 8832, 8843

2. Composition/Information on Ingredients

Ingredient CAS No Percent Hazardous
--------------------------------------- ------------ ------------ ---------

Zinc Oxide 1314-13-2 99 - 100% Yes

3. Hazards Identification

Emergency Overview
--------------------------

CAUTION! MAY IRRITATE RESPIRATORY TRACT.

SAF-T-DATA(tm) Ratings (Provided here for your
convenience)

-----------------------------------------------------------------------------------------------------------

Health Rating: 2 - Moderate
Flammability Rating: 1 - Slight

Reactivity Rating: 0 - None
Contact Rating: 1 - Slight
Lab
Protective Equip: GOGGLES; LAB COAT; VENT HOOD; PROPER GLOVES
Storage
Color Code: Green (General Storage)

Potential Health Effects
----------------------------------

Inhalation:
May cause irritation to the respiratory tract.
Symptoms may include coughing and shortness of breath. Inhalation can cause a
flu-like illness (metal fume fever). This 24- to 48-hour illness is
characterized by chills, fever, aching muscles, dryness in the mouth and
throat and headache.
Ingestion:
Large oral doses may cause
irritation to the gastrointestinal tract.
Skin Contact:
Not
expected to be a health hazard from skin exposure.
Eye Contact:

Not expected to be a health hazard.
Chronic Exposure:
No
information found.
Aggravation of Pre-existing Conditions:

Persons with a pre-existing heart condition or impaired respiratory
function may be more susceptible to the effects of this substance.

4. First Aid Measures

Inhalation:
Remove to fresh air. Get medical attention
for any breathing difficulty.
Ingestion:
Not expected to
require first aid measures. If large amounts were swallowed, give water to
drink and get medical advice.
Skin Contact:
Not expected to
require first aid measures. Wash exposed area with soap and water. Get medical
advice if irritation develops.
Eye Contact:
Not expected to
require first aid measures. Wash thoroughly with running water. Get medical
advice if irritation develops.

5. Fire Fighting Measures

Fire:
Not considered to be a fire hazard.

Explosion:
Finely divided powder presents an explosion hazard.

Fire Extinguishing Media:
Use any means suitable for
extinguishing surrounding fire.
Special Information:
In the
event of a fire, wear full protective clothing and NIOSH-approved
self-contained breathing apparatus with full facepiece operated in the
pressure demand or other positive pressure mode. Zinc oxide fume may be
released when heated.

6. Accidental Release Measures

Clean-up personnel require protective clothing and respiratory
protection from dust. Ventilate area of leak or spill. Wear appropriate
personal protective equipment as specified in Section 8. Spills: Sweep up and
containerize for reclamation or disposal. Vacuuming or wet sweeping may be
used to avoid dust dispersal.

7. Handling and Storage

Keep in a tightly closed container, stored in a cool, dry,
ventilated area. Protect against physical damage. Isolate from incompatible
substances. Containers of this material may be hazardous when empty since they
retain product residues (dust, solids); observe all warnings and precautions
listed for the product.

8. Exposure Controls/Personal Protection

Airborne Exposure Limits:
Zinc oxide:
-OSHA
Permissible Exposure Limit (PEL):
fume: 5 mg/m3 (TWA)
respirable
fraction: 5 mg/m3 (TWA)
total dusts: 15 mg/m3 (TWA)

-ACGIH Threshold
Limit Value (TLV):
2 mg/m3 (TWA), 10 mg/m3 (STEL), Respirable fraction

Ventilation System:
A system of local and/or general exhaust is
recommended to keep employee exposures below the Airborne Exposure Limits.
Local exhaust ventilation is generally preferred because it can control the
emissions of the contaminant at its source, preventing dispersion of it into
the general work area. Please refer to the ACGIH document, Industrial
Ventilation, A Manual of Recommended Practices, most recent edition, for
details.
Personal Respirators (NIOSH Approved):
If the exposure
limit is exceeded, a half-face dust/mist respirator may be worn for up to ten
times the exposure limit or the maximum use concentration specified by the
appropriate regulatory agency or respirator supplier, whichever is lowest. A
full-face piece dust/mist respirator may be worn up to 50 times the exposure
limit, or the maximum use concentration specified by the appropriate
regulatory agency, or respirator supplier, whichever is lowest. For
emergencies or instances where the exposure levels are not known, use a
full-facepiece positive-pressure, air-supplied respirator. WARNING:
Air-purifying respirators do not protect workers in oxygen-deficient
atmospheres.
Skin Protection:
Wear protective gloves and clean
body-covering clothing.
Eye Protection:
Use chemical safety
goggles. Maintain eye wash fountain and quick-drench facilities in work area.

9. Physical and Chemical Properties

Appearance:
White to yellowish-white amorphous powder.

Odor:
Odorless.
Solubility:
Insoluble in water,
alcohol; soluble in dilute acids.
Specific Gravity:
5.67

pH:
No information found.
% Volatiles by volume @ 21C
(70F):
0
Boiling Point:
Sublimes.
Melting
Point:
1975C (3587F)
Vapor Density (Air=1):
No
information found.
Vapor Pressure (mm Hg):
No information
found.
Evaporation Rate (BuAc=1):
No information found.

10. Stability and Reactivity

Stability:
Stable under ordinary conditions of use and
storage. Absorbs carbon dioxide from air.
Hazardous Decomposition
Products:
When heated to very high temperatures, zinc oxide sublimes
to produce toxic fumes.
Hazardous Polymerization:
Will not
occur.
Incompatibilities:
Has exploded when mixed with
chlorinated rubber. Reacts violently with magnesium, linseed oil. Zinc oxide
and magnesium can react explosively when heated.
Conditions to
Avoid:
Heat, incompatibles.

11. Toxicological Information

Investigated as a mutagen, reproductive effector.

--------\Cancer Lists\------------------------------------------------------
---NTP Carcinogen---
Ingredient Known Anticipated IARC Category
------------------------------------ ----- ----------- -------------
Zinc Oxide (1314-13-2) No No None

12. Ecological Information

Environmental Fate:
No information found.

Environmental Toxicity:
No information found.

13. Disposal Considerations

Whatever cannot be saved for recovery or recycling should be
managed in an appropriate and approved waste disposal facility. Processing,
use or contamination of this product may change the waste management options.
State and local disposal regulations may differ from federal disposal
regulations. Dispose of container and unused contents in accordance with
federal, state and local requirements.

14. Transport Information

Not regulated.

15. Regulatory Information

--------\Chemical Inventory Status - Part 1\---------------------------------
Ingredient TSCA EC Japan Australia
----------------------------------------------- ---- --- ----- ---------
Zinc Oxide (1314-13-2) Yes Yes Yes Yes

--------\Chemical Inventory Status - Part 2\---------------------------------
--Canada--
Ingredient Korea DSL NDSL Phil.
----------------------------------------------- ----- --- ---- -----
Zinc Oxide (1314-13-2) Yes Yes No Yes

--------\Federal, State & International Regulations - Part 1\----------------
-SARA 302- ------SARA 313------
Ingredient RQ TPQ List Chemical Catg.
----------------------------------------- --- ----- ---- --------------
Zinc Oxide (1314-13-2) No No No Zinc compoun

--------\Federal, State & International Regulations - Part 2\----------------
-RCRA- -TSCA-
Ingredient CERCLA 261.33 8(d)
----------------------------------------- ------ ------ ------
Zinc Oxide (1314-13-2) No No No

Chemical Weapons Convention: No TSCA 12(b): No CDTA: No
SARA 311/312: Acute: Yes Chronic: No Fire: No Pressure: No
Reactivity: No (Pure / Solid)

Australian Hazchem Code: None allocated.

Poison Schedule: None allocated.
WHMIS:
This MSDS
has been prepared according to the hazard criteria of the Controlled Products
Regulations (CPR) and the MSDS contains all of the information required by the
CPR.

16. Other Information

NFPA Ratings: Health: 1 Flammability: 0
Reactivity: 0
Label Hazard Warning:
CAUTION! MAY
IRRITATE RESPIRATORY TRACT.
Label Precautions:
Avoid breathing
dust.
Keep container closed.
Use with adequate ventilation.
Label
First Aid:
If inhaled, remove to fresh air. Get medical attention for
any breathing difficulty.
Product Use:
Laboratory Reagent.

Revision Information:
No Changes.
Disclaimer:

************************************************************************************************

Mallinckrodt Baker, Inc. provides the information contained herein in
good faith but makes no representation as to its comprehensiveness or
accuracy. This document is intended only as a guide to the appropriate
precautionary handling of the material by a properly trained person using this
product. Individuals receiving the information must exercise their independent
judgment in determining its appropriateness for a particular purpose.
MALLINCKRODT BAKER, INC. MAKES NO REPRESENTATIONS OR WARRANTIES, EITHER
EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE WITH RESPECT TO THE
INFORMATION SET FORTH HEREIN OR THE PRODUCT TO WHICH THE INFORMATION REFERS.
ACCORDINGLY, MALLINCKRODT BAKER, INC. WILL NOT BE RESPONSIBLE FOR DAMAGES
RESULTING FROM USE OF OR RELIANCE UPON THIS INFORMATION.

************************************************************************************************

Prepared by: Environmental Health & Safety
Phone Number:
(314) 654-1600 (U.S.A.)