TRADE NAME: CAUSTIC SODA (NaOH)
UN/NA (PIN) No.: 1823
CHEMICAL CLASS: Bases, alkalies (inorganic).
APPLICATIONS: Oil well drilling fluid additive. pH modifier.
EMERGENCY TELEPHONE: 281-561-1600
SUPPLIER: Supplied by a Business Unit of M-I L.L.C.
P.O. Box 42842, Houston, Texas 77242-2842
See cover sheet for local supplier.
TELEPHONE: 281-561-1509
FAX: 281-561-7240
CONTACT PERSON: Sam Hoskin

INGREDIENT NAME:    CAS No.:      CONTENTS :      EPA RQ:     TPQ:

Sodium hydroxide       1310-73-2         100 %             1 000 lbs

EMERGENCY OVERVIEW:

DANGER! CAUSES EYE AND SKIN BURNS. Do not get in eyes or on skin or clothing. Avoid breathing airborne product. Keep container closed. Use only with adequate ventilation. Wash thoroughly after handling. Avoid contact with water or moisture, which may generate sufficient heat to ignite combustible materials. This product is a white pellet or flake material. Slippery when wet.

ACUTE EFFECTS:

HEALTH HAZARDS, GENERAL:

Contact with this product is severely irritating to the eyes, skin, and respiratory tract and may cause severe eye injury.

INHALATION: Severely irritating to the respiratory tract if inhaled.
INGESTION: May cause burns in mucous membranes, throat, esophagus, and stomach.
SKIN: Corrosive to skin.
EYES: Corrosive to eyes.

CHRONIC EFFECTS:

CARCINOGENICITY:

IARC: Not listed. OSHA: Not regulated. NTP: Not listed.
10296 - CAUSTIC SODA (NaOH)

ROUTE OF ENTRY:

Inhalation. Skin and/or eye contact.

TARGET ORGANS:

Respiratory system, lungs. Skin. Eyes.

GENERAL: Persons seeking medical attention should carry a copy of this MSDS with them.
INHALATION: Move the exposed person to fresh air at once. Perform artificial respiration if breathing has stopped. Get medical attention.
INGESTION: Drink a couple of glasses water or milk. Do NOT induce vomiting unless directed to do so by a physician. Never give anything by mouth to an unconscious person. Get medical attention.
SKIN: Wash skin thoroughly with soap and water. Remove contaminated clothing. Get medical attention if any discomfort continues.
EYES: Promptly wash eyes with lots of water while lifting the eye lids. Continue to rinse for at least 15 minutes. Get medical attention if any discomfort continues.

AUTO IGNITION TEMP. (°F): N/D
FLAMMABILITY LIMIT - LOWER(%): N/D
FLAMMABILITY LIMIT - UPPER(%): N/D
EXTINGUISHING MEDIA:

Carbon dioxide (CO2). Dry chemicals. Foam.

SPECIAL FIRE FIGHTING PROCEDURES:

No specific fire fighting procedure given.

UNUSUAL FIRE AND EXPLOSION HAZARDS:

Upon contact with certain metals and water or moist air, hydrogen gas is generated, forming explosive mixtures with air.

HAZARDOUS COMBUSTION PRODUCTS:

Irritating gases/vapors/fumes.

PERSONAL PRECAUTIONS:

Wear proper personal protective equipment (see MSDS Section 8).

SPILL CLEAN-UP PROCEDURES:

Avoid generating and spreading of dust. Shovel into dry containers. Cover and move the containers. Flush the area with water. Do not contaminate drainage or waterways. Repackage or recycle if possible.

HANDLING PRECAUTIONS:

Avoid handling that causes dust to generate. Wear full protective clothing for prolonged exposure and/or high concentrations. Make eye wash and emergency shower available at the work place. Wash hands often and change clothing when needed. Provide good ventilation. Provide mechanical ventilation or local exhaust ventilation.

STORAGE PRECAUTIONS:

Store at moderate temperatures in dry, well ventilated area. Keep in original container.

*C = Ceiling Limit

PROTECTIVE EQUIPMENT:
ENGINEERING CONTROLS: Use appropriate engineering controls such as exhaust ventilation and process enclosure to reduce air contamination and keep worker exposure below the applicable limits.
VENTILATION: Supply natural or mechanical ventilation adequate to exhaust airborne product and keep exposures below the applicable limits.
RESPIRATORS: Use at least a NIOSH-approved N95 half-mask disposable or reuseable particulate respirator. In work environments containing oil mist/aerosol, use at least a NIOSH-approved P95 half-mask disposable or reuseable particulate respirator.
PROTECTIVE GLOVES: Use gauntlet type rubber gloves.
EYE PROTECTION: Use tight-fitting goggles if dust is generated. Wear splash-proof eye goggles to prevent any possibility of eye contact.
PROTECTIVE CLOTHING: Wear appropriate clothing to prevent any possibility of skin contact. Provide eyewash station and safety shower.
HYGIENIC WORK PRACTICES: Wash promptly with soap and water if skin becomes contaminated. Change work clothing daily if there is any possibility of contamination.

APPEARANCE/PHYSICAL STATE: Pellets or flakes.
COLOR: White.
ODOR: Odorless or no characteristic odor.
SOLUBILITY DESCRIPTION: Soluble in water.
BOILING POINT (°F, interval): 2530 PRESSURE: 760mmHg
MELT./FREEZ. POINT (°F, interval): 604
DENSITY/SPECIFIC GRAVITY (g/ml): 2.13 TEMPERATURE (°F): 68
BULK DENSITY: 133 lb/cu. ft.; 2131 kg/m3
VAPOR DENSITY (air=1): N/A
VAPOR PRESSURE: 42 mmHg TEMPERATURE (°F): 1832
pH-VALUE, DILUTED SOLUTION: 13 CONCENTRATION (%,M): 1%

STABILITY: Normally stable.
CONDITIONS TO AVOID: Reacts strongly with water. Avoid contact with acids.
HAZARDOUS POLYMERIZATION: Will not polymerize.
POLYMERIZATION DESCRIPTION: Not relevant.
MATERIALS TO AVOID: Organochlorine solvents, nitro and nitroso compounds, organic peroxides; aluminum, zinc, tin and their alloys.
HAZARDOUS DECOMPOSITION PRODUCTS: No specific hazardous decomposition products noted.

Component: Sodium hydroxide

TOXICOLOGICAL DATA:

24 hours. Eye. Rabbit. 1 mg Severe Irritation Corrosive effects.
24 hours. Skin. Rabbit. 500 mg Severe Irritation Corrosive effects.
LDLo. Oral. Rabbit. 500 mg/kg Acute toxicity.

TOXIC DOSE - LD 50: 1350 mg/kg (skn-rbt)

LC 50, 96 HRS, FISH, mg/l: 125 (Mosquitofish)

EC 50, 48 HRS, DAPHNIA, mg/l: 100

ACUTE AQUATIC TOXICITY:

This product passes the mysid shrimp toxicity test required by the U.S. Environmental Protection Agency (EPA) Region VI (Gulf of Mexico) NPDES Permit, which regulates offshore discharge of drilling fluids, when tested in a standard drilling fluid. Contact M-I's Environmental Affairs Department for more information.
This product is approved for use under the U.S. Environmental Protection Agency (EPA) Region IX (California) General NPDES Permit which regulates offshore discharges of drilling fluids. Contact M-I's Environmental Affairs Department for more information.

WASTE MANAGEMENT:

This product, should it become a waste, is hazardous by U.S. RCRA criteria.
THIS CONTAINER MAY BE HAZARDOUS WHEN EMPTY. Empty containers retain residues. All labeled precautions must be observed.

DISPOSAL METHODS:

Recover and reclaim or recycle, if practical. Should this product become a waste, dispose of in a permitted industrial landfill. Ensure that containers are empty by RCRA criteria before disposal in a permitted industrial landfill.

LABEL FOR CONVEYANCE:
PROPER SHIPPING DESCRIPTION II: Sodium hydroxide, solid, 8, UN1823, PG II
GENERAL: RQ = 1000
EMERGENCY RESPONSE GUIDE No.: 154

U.S. DOT:

UN/NA No.: 1823
U.S. DOT HAZARD LABEL: CORROSIVE (Black/white diam.) DOT17
U.S. DOT CLASS: Class 8 - Corrosive Material
U.S. DOT PACKING GROUP: II
U.S. DOT PACKAGING INSTRUCTIONS: 49 CFR 173.154; 173.212; 240

CANADIAN TRANSPORT:

TDGR CLASS: Class 8 - Corrosives
TDGR LABEL: Corrosive

SEA TRANSPORT:

UN No. SEA: 1823
IMDG CLASS: Class 8 - Corrosives
IMDG PAGE No.: 8225-1
IMDG PACK GR.: II
EmS No.: 8-06
MFAG TABLE No.: 705

AIR TRANSPORT:

UN No., AIR: 1823
ICAO CLASS: Class 8 - Corrosives
AIR PACK GR.: II

WASTE CLASSIFICATION: A hazardous waste by U.S. RCRA criteria

REGULATORY STATUS: This product or its components, if a mixture, is subject to following regulations (Not meant to be all-inclusive, selected regulations represented):

SECTION 313: This product does not contain toxic chemical subject to the reporting requirements of Section 313 of Title III of the Superfund Amendment and Reauthorization Act of 1986 and 40 CFR Part 372.

SARA 311 Categories:

1: Immediate (Acute) Health Effects

5. Reactivity Hazard

The components of this product are listed on or are exempt from the following international chemical registries:

TSCA (U.S.)

DSL (Canada)

Illinois Right-to-Know
New Jersey Right-to-Know
Pennsylvania Right-to-Know
PROPOSITION 65: This product does not contain chemicals considered by the State of California's Safe Drinking Water and Toxic Enforcement Act of 1986 as causing cancer or reproductive toxicity, and for which warnings are now required.

This Material Safety Data Sheet has been prepared in compilance with the Controlled Product Regulations.
Canadian WHMIS Classification: E - Corrosive Material D2B - Other Toxic Effects: Toxic Material

NPCA HMIS HAZARD INDEX: 3 Serious Hazard

FLAMMABILITY: 0 Minimal Hazard

REACTIVITY: 1 Slight Hazard

NPCA HMIS PERS. PROTECT. INDEX: X Ask your supervisor for guidance

USER NOTES: N/A = Not applicable N/D = Not determined

INFORMATION SOURCES:

OSHA Permissible Exposure Limits, 29 CFR 1910, Subpart Z, Section 29 CFR 1910.1000, Air Contaminants.
ACGIH Threshold Limit Values and Biological Exposure Indices for Chemical Substances and Physical Agents (latest edition). Sax's Dangerous Properties of Industrial Materials, 9th ed., Lewis, R.J. Sr., (ed.), VNR, New York, New York, (1997).
Product information provided by the commercial vendor(s).

PREPARED BY: Sam Hoskin

REVISION No./Repl. MSDS of: 1 / June 3, 1996

MSDS STATUS: Approved.

DATE: June 9, 1998