MATERIAL SAFETY DATA SHEET (MSDS)

Product Identification

Synonyms : Caustic potash; potassium hydrate
CAS No : 1310-58-3
Molecular Weight : 56.11
Chemical Formula: NaOH : KOH


Composition/Information on Ingredients

  • Ingredient CAS No Percent Hazardous
  • Potassium Hydroxide 1310-58-3 85 - 90% Yes
    Water 7732-18-5 10 - 15% No

Identification Emergency Overview

POISON! DANGER! CORROSIVE. CAUSES SEVERE BURNS TO SKIN,
EYES, RESPIRATORY TRACT, AND GASTROINTESTINAL TRACT.
MATERIAL IS EXTREMELY DESTRUCTIVE TO ALL BODY TISSUES.
MAY BE FATAL IF SWALLOWED. HARMFUL IF INHALED.

Health Rating: 3 Severe(Poison)
Flammability Rating: 0 None
Reactivity Rating: 2 Moderate
Contact Rating: 4 Extreme (Corrosive)
Lab Protective Equip: GOGGLES; LAB COAT; VENT HOOD; PROPERGLOVES
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 the severity of exposure. Symptoms may include coughing, sneezing, damage to the nasal or respiratory tract. High concentrations can cause lung damage.

Ingestion:

Toxic! Swallowing may cause severe burns of mouth, throat and stomach. Other symptoms may include vomiting, diarrhea. Severe scarring of tissue and death may result. Estimated lethal dose: 5 grams.

Skin Contact:

Corrosive! Contact with skin can cause irritation or severe burns and scarring with greater exposures.

Eye Contact:

Highly Corrosive! Causes irritation of eyes with tearing, redness, swelling. Greater exposures cause severe burns with possible blindness resulting.

Chronic Exposure:

Prolonged contact with dilute solutions or dust of potassium hydroxide has a destructive effect on 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.

First Aid Measures Inhalation:

Remove to fresh air. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Call a physician.

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:

In case of contact, immediately flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse. Thoroughly clean shoes before reuse. Get medical attention immediately.

Eye Contact:

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

Fire Fighting Measures Fire

Not combustible, but contact with water or moisture may generate enough heat to ignite combustibles.

Explosion:

Can react with chemically reactive metals such as aluminum, zinc, magnesium, copper, etc. to release hydrogen gas which can form explosive mixtures with air.

 

Fire Extinguishing Media:

Use any means suitable for extinguishing surrounding fire.

Special Information

Solution process causes formation of corrosive mists. Hot or molten material can react violently with water. 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.

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.s

Handling and Storage

Keep in a tightly closed container, stored in a cool, dry, ventilated area. Protect against physical damage. Isolate from incompatible substances. Protect from moisture. Addition to water releases heat which can result in violent boiling and spattering. Always add slowly and in small amounts. Never use hot water. 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.

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, a half-face dust/mist respirator 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 dust/mist respirator 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:

Rubber or neoprene gloves and additional protection including impervious boots, apron, or coveralls, as needed in areas of unusual exposure.

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.

Physical and Chemical Properties

Appearance: White deliquescent solid
Odor: Odorless.
Solubility: 52.8% in water @ 20C (68F)
Specific Gravity: 2.04
pH: 13.5 (0.1 molar solution)
% Volatiles by volume @ 21C (70F) 0
Boiling Point: 1320C (2408F)
Melting Point: 360C (680F)
Vapor Density (Air=1): No information found.
Vapor Pressure (mm Hg): 1.0 @ 714C (1317F)
Evaporation Rate (BuAc=1): No information found.

Stability and Reactivity Stability:

Stable under ordinary conditions of use and storage.

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 sugarsto produce carbon monoxide. Precautions should be taken including monitoring the tank atmosphere for carbon monoxide to ensure safety ofpersonnel before vessel entry.

Conditions to Avoid:

Heat, moisture, incompatibles.

Toxicological Information

For potassium hydroxide: Oral rat LD50: 273 mg/kg; Investigated as a mutagen. Skin Irritation Data (std Draize, 50 mg/24 H): Human, Severe; Rabbit, Severe. Eye Irritation Data(Rabbit, non-std test,1 mg/24 H, rinse): Moderate.

Cancer Lists:

  • NTP Carcinogen Ingredient Known Anticipated IARC Category Sodium Hydroxide (1310-73-2) No No None
  • For potassium hydroxide: Oral rat LD50: 273 mg/kg; Investigated as a
    mutagen. Skin Irritation Data (std Draize, 50 mg/24 H): Human, Severe;
    Rabbit, Severe. Eye Irritation Data(Rabbit, non-std test,1 mg/24 H, rinse):
    Moderate.
  • Cancer Lists
    NTP Carcinogen
    Ingredient Known Anticipated IARC Category
    Potassium Hydroxide (1310-58-3) No No None
    Water (7732-18-5) No No None

Ecological Information Environmental Fate:

No information found.

Environmental Toxicity:

Potassium Hydroxide: TLm: 80 ppm/Mosquito fish/ 24 hr./ Fresh water

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.

Transport Information

Proper Shipping Name: POTASSIUM HYDROXIDE, SOLID

Hazard Class: 8
UN/NA: UN1813
Packing Group: II
Information reported for product/size: 110LB
International (Water, I.M.O.)
Proper Shipping Name: POTASSIUM HYDROXIDE, SOLID
Hazard Class: 8
UN/NA: UN1813
Packing Group: II
Information reported for product/size: 110LB
International (Air, I.C.A.O.)  


Regulatory Information

Chemical Inventory Status - Part 1 Ingredient TSCA EC Japan Australia Potassium Hydroxide (1310-58-3) Yes Yes Yes Yes Water (7732-18-5) Yes Yes Yes Yes Chemical Inventory Status - Part 2 Canada Ingredient Korea DSL NDSL Phil. Potassium Hydroxide (1310-58-3) 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. Potassium Hydroxide (1310-58-3) No No No No Water (7732-18-5) No No No No Federal, State & International Regulations - Part 2 -RCRA- -TSCAIngredient CERCLA 261.33 8(d) Potassium Hydroxide (1310-58-3) 1000 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: Yes Fire: No Pressure: No Reactivity: Yes (Mixture / Solid)

Other Information

NFPA Ratings: Health: 3 Flammability: 0 Reactivity: 1

Label Warning:

POISON! DANGER! CORROSIVE. CAUSES SEVERE BURNS TO SKIN, EYES, RESPIRATORY TRACT, AND GASTROINTESTINAL TRACT. MATERIAL IS EXTREMELY DESTRUCTIVE TO ALL BODY TISSUES. MAY BE FATAL IF SWALLOWED. HARMFUL IF INHALED.

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.