MSDS Number: P3973 * * * * * Effective Date: 11/21/08 * * * * *
Supercedes: 01/03/06

PHOSPHORIC ACID

1. Product Identification

Synonyms: Ortho-phosphoric acid; white phosphoric acid

CAS No.: 7664-38-2
Molecular Weight: 98.00

Chemical Formula: H3PO4 in H2O
Product Codes:
J.T.
Baker: 0238, 0248, 0259, 0260, 0262, 0263, 0264, 0265, 0268, 0269, 0273, 0274,
5372, 5682, 5686, 5804, 5841, 5854, 6908
Mallinckrodt: 2779, 2788, 2796,
3563, H106, XM-223

2. Composition/Information on Ingredients

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

Phosphoric Acid 7664-38-2 55 - 95% Yes
Water 7732-18-5 5 - 45% No

3. Hazards Identification

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

DANGER! CORROSIVE. CAUSES SEVERE IRRITATION AND BURNS TO EVERY AREA OF
CONTACT. HARMFUL IF SWALLOWED OR INHALED.

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

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

Health Rating: 3 - Severe
Flammability Rating: 0 - None
Reactivity
Rating: 2 - Moderate
Contact Rating: 4 - Extreme (Corrosive)
Lab
Protective Equip: GOGGLES & SHIELD; LAB COAT & APRON; VENT HOOD;
PROPER GLOVES
Storage Color Code: White (Corrosive)

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

Inhalation:
Inhalation is not an expected hazard unless
misted or heated to high temperatures. Mist or vapor inhalation can cause
irritation to the nose, throat, and upper respiratory tract. Severe exposures
can lead to a chemical pneumonitis.
Ingestion:
Corrosive. May
cause sore throat, abdominal pain, nausea, and severe burns of the mouth,
throat, and stomach. Severe exposures can lead to shock, circulatory collapse,
and death.
Skin Contact:
Corrosive. May cause redness, pain,
and severe skin burns.
Eye Contact:
Corrosive. May cause
redness, pain, blurred vision, eye burns, and permanent eye damage.

Chronic Exposure:
No information found.
Aggravation of
Pre-existing Conditions:
Persons with pre-existing skin disorders or
eye problems, or impaired respiratory function may be more susceptible to the
effects of the substance.

4. First Aid Measures

Inhalation:
Remove to fresh air. If not breathing, give
artificial respiration. If breathing is difficult, give oxygen. Call a
physician immediately.
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:
Immediately flush skin with plenty of water for at least 15
minutes while removing contaminated clothing and shoes. Call a physician,
immediately. Wash clothing before reuse.
Eye Contact:

Immediately flush eyes with gentle but large stream of water for at least
15 minutes, lifting lower and upper eyelids occasionally. Call a physician
immediately.

5. Fire Fighting Measures

Fire:
Not considered to be a fire hazard. Contact with
most metals causes formation of flammable and explosive hydrogen gas.

Explosion:
Not considered to be an explosion hazard.

Fire Extinguishing Media:
Use any means suitable for
extinguishing surrounding fire. Water spray may be used to keep fire exposed
containers cool. If water is used, use in abundance to control heat and acid
build-up.
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

Ventilate area of leak or spill. Wear appropriate personal
protective equipment as specified in Section 8. Isolate hazard area. Keep
unnecessary and unprotected personnel from entering. Contain and recover
liquid when possible. Neutralize with alkaline material (soda ash, lime), then
absorb with an inert material (e. g., vermiculite, dry sand, earth), and place
in a chemical waste container. Do not use combustible materials, such as saw
dust. Do not flush to sewer! US Regulations (CERCLA) require reporting spills
and releases to soil, water and air in excess of reportable quantities. The
toll free number for the US Coast Guard National Response Center is (800)
424-8802.

J. T. Baker NEUTRASORB® acid neutralizers are recommended
for spills of this product.

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,
incompatibilities, and direct sunlight. Corrosive to mild steel. Store in
rubber lined or 316 stainless steel designed for phosphoric acid. Do not wash
out container and use it for other purposes. When diluting, the acid should
always be added slowly to water and in small amounts. Never use hot water and
never add water to the acid. Water added to acid can cause uncontrolled
boiling and splashing. Protect from freezing. Containers of this material may
be hazardous when empty since they retain product residues (vapors, liquid);
observe all warnings and precautions listed for the product.

8. Exposure Controls/Personal Protection

Airborne Exposure Limits:
-OSHA Permissible Exposure
Limit (PEL):
1 mg/m3 (TWA)

-ACGIH Threshold Limit Value (TLV):
1
mg/m3 (TWA), 3 mg/m3 (STEL)
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 full facepiece
respirator with high efficiency dust/mist filter 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 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 a
full face shield where splashing is possible. Maintain eye wash fountain and
quick-drench facilities in work area.

9. Physical and Chemical Properties

Physical data below refers to concentrated phosphoric acid.

Appearance:
Clear, colorless syrupy liquid.
Odor:

Odorless.
Solubility:
Miscible in all proportions in water.

Specific Gravity:
1.69 @ 25C
pH:
1.5 (0.1 N
aqueous solution)
% Volatiles by volume @ 21C (70F):
100

Boiling Point:
158C (316F)
Melting Point:
21C
(70F)
Vapor Density (Air=1):
3.4
Vapor Pressure (mm
Hg):
0.03 @ 20C (68F)
Evaporation Rate (BuAc=1):
No
information found.

10. Stability and Reactivity

Stability:
Stable under ordinary conditions of use and
storage. Substance can supercool without crystallizing.
Hazardous
Decomposition Products:
Phosphorus oxides may form when heated to
decomposition.
Hazardous Polymerization:
Will not occur.

Incompatibilities:
Liberates explosive hydrogen gas when
reacting with chlorides and stainless steel. Can react violently with sodium
tetrahydroborate. Exothermic reactions with aldehydes, amines, amides,
alcohols and glycols, azo-compounds, carbamates, esters, caustics, phenols and
cresols, ketones, organophosphates, epoxides, explosives, combustible
materials, unsaturated halides, and organic peroxides. phosphoric acid forms
flammable gases with sulfides, mercaptans, cyanides and aldehydes. It also
forms toxic fumes with cyanides, sulfide, fluorides, organic peroxides, and
halogenated organics. Mixtures with nitromethane are explosive.

Conditions to Avoid:
Incompatibles.

11. Toxicological Information

Oral rat LD50: 1530 mg/kg; investigated as a mutagen.

--------\Cancer Lists\------------------------------------------------------
---NTP Carcinogen---
Ingredient Known Anticipated IARC Category
------------------------------------ ----- ----------- -------------
Phosphoric Acid (7664-38-2) No No None
Water (7732-18-5) No No None

12. Ecological Information

Environmental Fate:
When released into the soil, this
material may leach into groundwater. When released to water, acidity may be
readily reduced by natural water hardness minerals. The phosphate, however,
may persist indefinitely.
Environmental Toxicity:
No
information found.

13. Disposal Considerations

Whatever cannot be saved for recovery or recycling should be
handled as hazardous waste and sent to a RCRA approved incinerator or disposed
in a RCRA approved waste 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

Domestic (Land, D.O.T.)
-----------------------

Proper Shipping Name: PHOSPHORIC ACID SOLUTION
Hazard
Class: 8
UN/NA: UN1805
Packing Group: III

Information reported for product/size: 350LB

International (Water, I.M.O.)
-----------------------------

Proper Shipping Name: PHOSPHORIC ACID SOLUTION
Hazard
Class: 8
UN/NA: UN1805
Packing Group: III

Information reported for product/size: 350LB

15. Regulatory Information

--------\Chemical Inventory Status - Part 1\---------------------------------
Ingredient TSCA EC Japan Australia
----------------------------------------------- ---- --- ----- ---------
Phosphoric Acid (7664-38-2) Yes Yes Yes Yes
Water (7732-18-5) Yes Yes Yes Yes

--------\Chemical Inventory Status - Part 2\---------------------------------
--Canada--
Ingredient Korea DSL NDSL Phil.
----------------------------------------------- ----- --- ---- -----
Phosphoric Acid (7664-38-2) Yes Yes No Yes
Water (7732-18-5) Yes Yes No Yes

--------\Federal, State & International Regulations - Part 1\----------------
-SARA 302- ------SARA 313------
Ingredient RQ TPQ List Chemical Catg.
----------------------------------------- --- ----- ---- --------------
Phosphoric Acid (7664-38-2) No No No No
Water (7732-18-5) No No No No

--------\Federal, State & International Regulations - Part 2\----------------
-RCRA- -TSCA-
Ingredient CERCLA 261.33 8(d)
----------------------------------------- ------ ------ ------
Phosphoric Acid (7664-38-2) 5000 No No
Water (7732-18-5) 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 / Liquid)

Australian Hazchem Code: 2R
Poison
Schedule: S5
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: 3 Flammability: 0
Reactivity: 0
Label Hazard Warning:
DANGER! CORROSIVE.
CAUSES SEVERE IRRITATION AND BURNS TO EVERY AREA OF CONTACT. HARMFUL IF
SWALLOWED OR INHALED.
Label Precautions:
Do not get in eyes, on
skin, or on clothing.
Keep container closed.
Use only with adequate
ventilation.
Do not breathe vapor or mist.
Wash thoroughly after
handling.
Label First Aid:
In case of contact, immediately
flush eyes or skin with plenty of water for at least 15 minutes. Remove
contaminated clothing and shoes. Wash clothing before reuse. 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 all cases call a physician immediately.
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.)