MSDS Number: S4034 * * * * * Effective Date: 05/04/07 * * * * *
Supercedes: 07/07/04

SODIUM HYDROXIDE

1. Product Identification

Synonyms: Caustic soda; lye; sodium hydroxide solid; sodium
hydrate
CAS No.: 1310-73-2
Molecular Weight: 40.00

Chemical Formula: NaOH
Product Codes:
J.T. Baker:
1508, 3717, 3718, 3721, 3722, 3723, 3728, 3734, 3736, 5045, 5565

Mallinckrodt: 7001, 7680, 7708, 7712, 7772, 7798

2. Composition/Information on Ingredients

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

Sodium Hydroxide 1310-73-2 99 - 100% Yes

3. Hazards Identification

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

POISON! DANGER! CORROSIVE. MAY BE FATAL IF SWALLOWED. HARMFUL IF
INHALED. CAUSES BURNS TO ANY AREA OF CONTACT. REACTS WITH WATER, ACIDS AND
OTHER MATERIALS.

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

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

Health Rating: 4 - Extreme (Poison)
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 Stripe (Store
Separately)

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

Inhalation:
Severe irritant. Effects from inhalation of
dust or mist vary from mild irritation to serious damage of the upper
respiratory tract, depending on severity of exposure. Symptoms may include
sneezing, sore throat or runny nose. Severe pneumonitis may occur.

Ingestion:
Corrosive! Swallowing may cause severe burns of
mouth, throat, and stomach. Severe scarring of tissue and death may result.
Symptoms may include bleeding, vomiting, diarrhea, fall in blood pressure.
Damage may appear days after exposure.
Skin Contact:
Corrosive!
Contact with skin can cause irritation or severe burns and scarring with
greater exposures.
Eye Contact:
Corrosive! Causes irritation of
eyes, and with greater exposures it can cause burns that may result in
permanent impairment of vision, even blindness.
Chronic Exposure:

Prolonged contact with dilute solutions or dust has a destructive effect
upon tissue.
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.
Ingestion:
DO NOT INDUCE VOMITING! Give large
quantities of water or milk if available. 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 plenty of water for at least 15 minutes,
lifting lower and upper eyelids occasionally. Get medical attention
immediately.

Note to Physician:
Perform endoscopy in all
cases of suspected sodium hydroxide ingestion. In cases of severe esophageal
corrosion, the use of therapeutic doses of steroids should be considered.
General supportive measures with continual monitoring of gas exchange,
acid-base balance, electrolytes, and fluid intake are also required.

5. Fire Fighting Measures

Fire:
Not considered to be a fire hazard. Hot or molten
material can react violently with water.
Can react with certain metals,
such as aluminum, to generate flammable hydrogen gas.
Explosion:

Not considered to be an explosion hazard.
Fire Extinguishing
Media:
Use any means suitable for extinguishing surrounding fire.
Adding water to caustic solution generates large amounts of heat.

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. 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. Do
not flush caustic residues to the sewer. Residues from spills can be diluted
with water, neutralized with dilute acid such as acetic, hydrochloric or
sulfuric. Absorb neutralized caustic residue on clay, vermiculite or other
inert substance and package in a suitable container for disposal.
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.

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. Always add the caustic to water while stirring; never the
reverse. 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. Do not store with aluminum or magnesium. Do not mix
with acids or organic materials.

8. Exposure Controls/Personal Protection

Airborne Exposure Limits:
- OSHA Permissible Exposure
Limit (PEL):
2 mg/m3 Ceiling
- ACGIH Threshold Limit Value (TLV):
2
mg/m3 Ceiling
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 a full face shield where splashing is possible.
Maintain eye wash fountain and quick-drench facilities in work area.

9. Physical and Chemical Properties

Appearance:
White, deliquescent pellets or flakes.

Odor:
Odorless.
Solubility:
111 g/100 g of
water.
Specific Gravity:
2.13
pH:
13 - 14 (0.5%
soln.)
% Volatiles by volume @ 21C (70F):
0
Boiling
Point:
1390C (2534F)
Melting Point:
318C (604F)

Vapor Density (Air=1):
> 1.0
Vapor Pressure (mm
Hg):
Negligible.
Evaporation Rate (BuAc=1):
No
information found.

10. Stability and Reactivity

Stability:
Stable under ordinary conditions of use and
storage. Very hygroscopic. Can slowly pick up moisture from air and react with
carbon dioxide from air to form sodium carbonate.
Hazardous
Decomposition Products:
Sodium oxide. Decomposition by reaction with
certain metals releases flammable and explosive hydrogen gas.
Hazardous
Polymerization:
Will not occur.
Incompatibilities:

Sodium hydroxide in contact with acids and organic halogen compounds,
especially trichloroethylene, may causes violent reactions. Contact with
nitromethane and other similar nitro compounds causes formation of
shock-sensitive salts. Contact with metals such as aluminum, magnesium, tin,
and zinc cause formation of flammable hydrogen gas. Sodium hydroxide, even in
fairly dilute solution, reacts readily with various sugars to produce carbon
monoxide. Precautions should be taken including monitoring the tank atmosphere
for carbon monoxide to ensure safety of personnel before vessel entry.

Conditions to Avoid:
Moisture, dusting and incompatibles.

11. Toxicological Information

Irritation data: skin, rabbit: 500 mg/24H severe; eye rabbit:
50 ug/24H severe; investigated as a mutagen.

--------\Cancer Lists\------------------------------------------------------
---NTP Carcinogen---
Ingredient Known Anticipated IARC Category
------------------------------------ ----- ----------- -------------
Sodium Hydroxide (1310-73-2) 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
handled as hazardous waste and sent to 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: SODIUM HYDROXIDE, SOLID
Hazard
Class: 8
UN/NA: UN1823
Packing Group: II
Information
reported for product/size: 300LB

International (Water,
I.M.O.)
-----------------------------
Proper Shipping Name:
SODIUM HYDROXIDE, SOLID
Hazard Class: 8
UN/NA: UN1823

Packing Group: II
Information reported for product/size: 300LB

15. Regulatory Information

--------\Chemical Inventory Status - Part 1\---------------------------------
Ingredient TSCA EC Japan Australia
----------------------------------------------- ---- --- ----- ---------
Sodium Hydroxide (1310-73-2) Yes Yes Yes Yes

--------\Chemical Inventory Status - Part 2\---------------------------------
--Canada--
Ingredient Korea DSL NDSL Phil.
----------------------------------------------- ----- --- ---- -----
Sodium Hydroxide (1310-73-2) Yes Yes No Yes

--------\Federal, State & International Regulations - Part 1\----------------
-SARA 302- ------SARA 313------
Ingredient RQ TPQ List Chemical Catg.
----------------------------------------- --- ----- ---- --------------
Sodium Hydroxide (1310-73-2) No No No No

--------\Federal, State & International Regulations - Part 2\----------------
-RCRA- -TSCA-
Ingredient CERCLA 261.33 8(d)
----------------------------------------- ------ ------ ------
Sodium Hydroxide (1310-73-2) 1000 No No

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

Australian Hazchem Code: 2R
Poison
Schedule: S6
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: 1
Label Hazard Warning:
POISON! DANGER!
CORROSIVE. MAY BE FATAL IF SWALLOWED. HARMFUL IF INHALED. CAUSES BURNS TO ANY
AREA OF CONTACT. REACTS WITH WATER, ACIDS AND OTHER MATERIALS.
Label
Precautions:
Do not get in eyes, on skin, or on clothing.
Do not
breathe dust.
Keep container closed.
Use only with adequate
ventilation.
Wash thoroughly after handling.
Label First Aid:

If swallowed, DO NOT INDUCE VOMITING. Give large quantities of water.
Never give anything by mouth to an unconscious person. In case of contact,
immediately flush eyes or skin with plenty of water for at least 15 minutes
while removing contaminated clothing and shoes. Wash clothing before reuse. If
inhaled, remove to fresh air. If not breathing give artificial respiration. If
breathing is difficult, give oxygen. In all cases get medical attention
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.)