MSDS Number: A2856 * * * * * Effective Date: 02/15/08 * * * * *
Supercedes: 04/15/05

ALUMINUM POTASSIUM SULFATE

1. Product Identification

Synonyms: Sulfuric acid, aluminum potassium salt (2:1:1),
dodecahydrate; potassium alum dodecahydrate; Alum Potassium USP Powder TAC;
Potassium alum; Potash alum; Alum; Kalinite
CAS No.: 10043-67-1
(Anhydrous) 7784-24-9 (Dodecahydrate)
Molecular Weight: 474.38

Chemical Formula: AlK(SO4)2 12H2O
Product Codes:

J.T. Baker: 0546, 0547, 0548
Mallinckrodt: 3216

2. Composition/Information on Ingredients

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

Sulfuric Acid, Aluminum Potassium Salt 10043-67-1 98 - 100% Yes
(2:1:1)

3. Hazards Identification

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

WARNING! HARMFUL IF SWALLOWED OR INHALED. CAUSES IRRITATION TO SKIN,
EYES AND RESPIRATORY TRACT.

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

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

Health Rating: 2 - Moderate
Flammability Rating: 0 - None

Reactivity Rating: 1 - Slight
Contact Rating: 2 - Moderate
Lab
Protective Equip: GOGGLES; LAB COAT; VENT HOOD; PROPER GLOVES
Storage
Color Code: Green (General Storage)

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

This material hydrolyzes in water to form sulfuric acid, which is
responsible for the irritating effects given below.

Inhalation:

Causes irritation to the respiratory tract. Symptoms may include coughing,
shortness of breath.
Ingestion:
Causes irritation to the
gastrointestinal tract. Symptoms may include nausea, vomiting and diarrhea.
There have been two cases of fatal human poisonings from ingestion of 30 grams
of alum.
Skin Contact:
Causes irritation to skin. Symptoms
include redness, itching, and pain.
Eye Contact:
Causes
irritation, redness, and pain.
Chronic Exposure:
No information
found.
Aggravation of Pre-existing Conditions:
No information
found.

4. First Aid Measures

Inhalation:
Remove to fresh air. If not breathing, give
artificial respiration. If breathing is difficult, give oxygen. Get medical
attention.
Ingestion:
If swallowed, DO NOT INDUCE VOMITING.
Give large quantities of water. Never give anything by mouth to an unconscious
person. Get medical attention immediately.
Skin Contact:
Wipe
off excess material from skin then immediately flush skin with plenty of water
for at least 15 minutes. Remove contaminated clothing and shoes. Get medical
attention. Wash clothing before reuse. Thoroughly clean shoes before reuse.

Eye Contact:
Immediately flush eyes with plenty of water for at
least 15 minutes, lifting upper and lower eyelids occasionally. Get medical
attention.

5. Fire Fighting Measures

Fire:
Not considered to be a fire hazard.

Explosion:
Not considered to be an explosion hazard.

Fire Extinguishing Media:
Use any means suitable for
extinguishing surrounding fire. Keep in mind that addition of water can cause
the formation of sulfuric acid.
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.

6. Accidental Release Measures

Cover spill with sodium bicarbonate or soda ash and mix. Ventilate
area of leak or spill. Keep unnecessary and unprotected people away from area
of spill. Wear appropriate personal protective equipment as specified in
Section 8. Spills: Pick up and place in a suitable container for reclamation
or disposal, using a method that does not generate
dust.

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:
-OSHA Permissible Exposure
Limit (PEL):
2 mg/m3 (TWA) soluble salts as Al
-ACGIH Threshold Limit
Value (TLV):
2 mg/m3 (TWA) soluble salts as Al
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 and engineering controls are not feasible, a half facepiece
particulate respirator (NIOSH type N95 or better filters) 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 particulate respirator (NIOSH type N100 filters)
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. If oil particles (e.g. lubricants, cutting
fluids, glycerine, etc.) are present, use a NIOSH type R or P filter. 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 impervious protective
clothing, including boots, gloves, lab coat, apron or coveralls, as
appropriate, to prevent skin contact.
Eye Protection:
Use
chemical safety goggles and/or full face shield where dusting or splashing of
solutions is possible. Maintain eye wash fountain and quick-drench facilities
in work area.

9. Physical and Chemical Properties

Appearance:
Colorless crystals.
Odor:

Odorless.
Solubility:
14% in water, 333% in boiling water

Density:
1.73
pH:
3.3 (0.2 M solution)
%
Volatiles by volume @ 21C (70F):
0
Boiling Point:
ca.
200C (ca. 392F) Loses water
Melting Point:
92.5C (198F)

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.
Hazardous Decomposition Products:
Hydrolyzes to form
dilute sulfuric acid. Toxic and corrosive oxides of sulfur may be formed when
heated to decomposition.
Hazardous Polymerization:
Will not
occur.
Incompatibilities:
Corrosive to metals in the presence
of water.
Conditions to Avoid:
Moisture and incompatibles.

11. Toxicological Information

Investigated as a reproductive effector.

--------\Cancer Lists\------------------------------------------------------
---NTP Carcinogen---
Ingredient Known Anticipated IARC Category
------------------------------------ ----- ----------- -------------
Sulfuric Acid, Aluminum Potassium No No None
Salt (2:1:1) (10043-67-1)

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
----------------------------------------------- ---- --- ----- ---------
Sulfuric Acid, Aluminum Potassium Salt (2:1:1) Yes Yes Yes Yes
(10043-67-1)

--------\Chemical Inventory Status - Part 2\---------------------------------
--Canada--
Ingredient Korea DSL NDSL Phil.
----------------------------------------------- ----- --- ---- -----
Sulfuric Acid, Aluminum Potassium Salt (2:1:1) Yes Yes No Yes
(10043-67-1)

--------\Federal, State & International Regulations - Part 1\----------------
-SARA 302- ------SARA 313------
Ingredient RQ TPQ List Chemical Catg.
----------------------------------------- --- ----- ---- --------------
Sulfuric Acid, Aluminum Potassium Salt No No No No
(2:1:1) (10043-67-1)

--------\Federal, State & International Regulations - Part 2\----------------
-RCRA- -TSCA-
Ingredient CERCLA 261.33 8(d)
----------------------------------------- ------ ------ ------
Sulfuric Acid, Aluminum Potassium Salt No No No
(2:1:1) (10043-67-1)

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:
WARNING! HARMFUL IF
SWALLOWED OR INHALED. CAUSES IRRITATION TO SKIN, EYES AND RESPIRATORY TRACT.

Label Precautions:
Avoid breathing dust.
Keep container
closed.
Use only with adequate ventilation.
Wash thoroughly after
handling.
Avoid contact with eyes, skin and clothing.
Label First
Aid:
If swallowed, DO NOT INDUCE VOMITING. Give large quantities of
water. Never give anything by mouth to an unconscious person. If inhaled,
remove to fresh air. If not breathing, give artificial respiration. If
breathing is difficult, give oxygen. In case of contact, wipe off excess
material from skin then immediately flush eyes or skin with plenty of water
for at least 15 minutes. Remove contaminated clothing and shoes. Wash clothing
before reuse. In all cases, get medical attention.
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.)