MSDS Number: P5521 * * * * * Effective Date: 11/21/08 * * * * *
Supercedes: 01/09/06

POTASSIUM ACID PHTHALATE

1. Product Identification

Synonyms: 1,2-Benzenedicarboxylic acid monopotassium salt;
potassium biphthalate; potassium hydrogen phthalate; Phthalic acid, potassium
salt
CAS No.: ç
Molecular Weight: 204.23
Chemical
Formula: HOOC-C6H4COOK
Product Codes:
J.T. Baker: 2958,
4889
Mallinckrodt: 6704

2. Composition/Information on Ingredients

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

Potassium Acid Phthalate 877-24-7 100% Yes

3. Hazards Identification

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

CAUTION! MAY CAUSE IRRITATION TO SKIN, EYES, AND RESPIRATORY TRACT.

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

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

Health Rating: 0 - None
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
----------------------------------

Information on the human health effects from exposure to this
substance is limited.

Inhalation:
May cause irritation to
respiratory tract because of slight acidity. Symptoms may include coughing and
sore throat.
Ingestion:
Large doses may produce nausea,
vomiting, and abnormal sensations in hands and feet. Because of slight
acidity, causes irritation to the mucous membranes.
Skin Contact:

Contact may cause irritation, with redness and pain.
Eye
Contact:
May cause eye irritation.
Chronic Exposure:
No
information found.
Aggravation of Pre-existing Conditions:
No
information found.

4. First Aid Measures

Inhalation:
Remove to fresh air. Get medical attention
for any breathing difficulty.
Ingestion:
Give large amounts of
water to drink. Never give anything by mouth to an unconscious person. Get
medical attention.
Skin Contact:
Immediately flush skin with
plenty of water for at least 15 minutes. Call a physician if irritation
develops.
Eye Contact:
In case of contact, immediately flush
eyes with plenty of water for at least 15 minutes, lifting upper and lower
eyelids occasionally. Call a physician if irritation persists.

5. Fire Fighting Measures

Fire:
As with most organic solids, fire is possible at
elevated temperatures or by contact with an ignition source.

Explosion:
Fine dust dispersed in air in sufficient
concentrations, and in the presence of an ignition source is a potential dust
explosion hazard.
Fire Extinguishing Media:
Water spray, dry
chemical, alcohol foam, or carbon dioxide.
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

Remove all sources of ignition. Ventilate area of leak or spill.
Wear appropriate personal protective equipment as specified in Section 8.
Spills: Clean up spills in a manner that does not disperse dust into the air.
Use non-sparking tools and equipment. Reduce airborne dust and prevent
scattering by moistening with water. Pick up spill for recovery or disposal
and place in a closed container.

7. Handling and Storage

Keep in a tightly closed container. Protect from physical damage.
Store in a cool, dry, ventilated area away from sources of heat, moisture and
incompatibilities. 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:
None established.

Ventilation System:
A system of local and/or general exhaust is
recommended to keep employee exposures as low as possible. 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):
For conditions of use
where exposure to dust or mist is apparent and engineering controls are not
feasible, a particulate respirator (NIOSH type N95 or better filters) may be
worn. 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-face 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:
Colorless or white crystals.

Odor:
Odorless.
Solubility:
25g/100m1 cold water

Specific Gravity:
1.64
pH:
4.0 0.05M soln.:

% Volatiles by volume @ 21C (70F):
0
Boiling Point:

No information found.
Melting Point:
No information found.

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:
Carbon dioxide and
carbon monoxide may form when heated to decomposition.
Hazardous
Polymerization:
Will not occur.
Incompatibilities:

Nitric Acid. Strong oxidizing agents.
Conditions to Avoid:

Heat, ignition sources and incompatibililites.

11. Toxicological Information

Oral rat LD50: >3200 mg/kg

--------\Cancer Lists\------------------------------------------------------
---NTP Carcinogen---
Ingredient Known Anticipated IARC Category
------------------------------------ ----- ----------- -------------
Potassium Acid Phthalate (877-24-7) 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
----------------------------------------------- ---- --- ----- ---------
Potassium Acid Phthalate (877-24-7) Yes Yes Yes Yes

--------\Chemical Inventory Status - Part 2\---------------------------------
--Canada--
Ingredient Korea DSL NDSL Phil.
----------------------------------------------- ----- --- ---- -----
Potassium Acid Phthalate (877-24-7) Yes Yes No Yes

--------\Federal, State & International Regulations - Part 1\----------------
-SARA 302- ------SARA 313------
Ingredient RQ TPQ List Chemical Catg.
----------------------------------------- --- ----- ---- --------------
Potassium Acid Phthalate (877-24-7) No No No No

--------\Federal, State & International Regulations - Part 2\----------------
-RCRA- -TSCA-
Ingredient CERCLA 261.33 8(d)
----------------------------------------- ------ ------ ------
Potassium Acid Phthalate (877-24-7) 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: 1
Reactivity: 0
Label Hazard Warning:
CAUTION! MAY CAUSE
IRRITATION TO SKIN, EYES, AND RESPIRATORY TRACT.
Label Precautions:

Avoid breathing dust.
Avoid contact with eyes, skin and
clothing.
Keep container closed.
Wash thoroughly after handling.
Use
with adequate ventilation.
Label First Aid:
In case of contact,
immediately flush skin or eyes with plenty of water for at least 15 minutes.
Call a physician if irritation develops or persists. 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.)