POTASSIUM HYDROXIDE, SOLUTION
UN/NA Number - The United Nations-North America number (also called UN number or DOT number). 4-digit number identifying an individual chemical or group of chemicals with similar characteristics. Required on shipping papers; often shown on placards or labels. This numbering system was developed by the U.S. Department of Transportation, and then became the UN standard system for classifying hazardous materials.
DOT Hazard Label - U.S. Department of Transportation hazard warning label for the chemical (such as flammable liquid or corrosive). This label must be displayed on shipped packages, railroad tank cars, and tank trucks according to specifications described in 49 CFR 172.
CHRIS Code - 3-letter code used by the U.S. Coast Guard to identify individual chemicals included in its CHRIS (Chemical Hazards Response Information System) manual.
NFPA 704 - Text description of the diamond-shaped placard, which contains codes indicating the level of the chemical's health, flammability, and instability hazards, along with special hazards such as water- and air-reactivity. See a guide to the NFPA diamond.
General Description - Brief description of the chemical's general appearance, behavior, and hazardousness.
List of data sources.
|CAS Number||UN/NA Number||DOT Hazard Label||CHRIS Code|
|Health||3||Can cause serious or permanent injury.|
|Flammability||0||Will not burn under typical fire conditions.|
|Instability||1||Normally stable but can become unstable at elevated temperatures and pressures.|
Air & Water Reactions - Special alerts if the chemical reacts with air, water, or moisture.
Fire Hazard - Description of the chemical's fire hazards (such as flammability, explosion risk, or byproducts that may evolve if the chemical is burned).
Health Hazard - Description of the chemical's health hazards (such as toxicity, flammability, or corrosivity).
Reactivity Profile - Description of the chemical's potential reactivity with other chemicals, air, and water. Also includes any other intrinsic reactive hazards (such as polymerizable or peroxidizable).
Reactive Groups - List of reactive groups that the chemical is assigned to, based on its known chemistry. Reactive groups are categories of chemicals that react in similar ways because their chemical structures are similar. Reactive groups are used to predict reactivity when you add a chemical to MyChemicals. Read more about reactive groups.
Potentially Incompatible Absorbents - Absorbents are products that can be used to soak up liquids from spills. However, some absorbents can react with particular chemicals (that is, they are incompatible), so caution should be used in selecting the correct absorbent for your situation. This section provides a list of potentially incompatible absorbents that have been known to react with liquids assigned to one or more of the reactive groups listed on this datasheet. Read more about absorbents, including situations to watch out for.
List of data sources.
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. Some are oxidizers and may ignite combustibles (wood, paper, oil, clothing, etc.). Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated. For UN3171, if Lithium ion batteries are involved, also consult GUIDE 147. (ERG, 2012)
Use caution: Liquids with this reactive group classification have been known to react with the absorbents listed below. More info about absorbents, including situations to watch out for...
- Cellulose-Based Absorbents
- Mineral-Based & Clay-Based Absorbents
Firefighting - Response recommendations if the chemical is on fire (or near a fire).
Non-Fire Response - Response recommendations if the chemical isn't on fire (or near a fire).
Protective Clothing - Recommendations for protective gear.
Dupont Tychem® Suit Fabrics - A table of normalized breakthrough times for DuPont Tychem suit fabrics for the chemical, if available.
First Aid - Recommended first aid treatment for people exposed to the chemical.
List of data sources.
As an immediate precautionary measure, isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters (75 feet) for solids.
SPILL: Increase, in the downwind direction, as necessary, the isolation distance shown above.
FIRE: If tank, rail car or tank truck is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directions; also, consider initial evacuation for 800 meters (1/2 mile) in all directions. (ERG, 2012)
SMALL FIRE: Dry chemical, CO2 or water spray.
LARGE FIRE: Dry chemical, CO2, alcohol-resistant foam or water spray. Move containers from fire area if you can do it without risk. Dike fire-control water for later disposal; do not scatter the material.
FIRE INVOLVING TANKS OR CAR/TRAILER LOADS: Fight fire from maximum distance or use unmanned hose holders or monitor nozzles. Do not get water inside containers. Cool containers with flooding quantities of water until well after fire is out. Withdraw immediately in case of rising sound from venting safety devices or discoloration of tank. ALWAYS stay away from tanks engulfed in fire. (ERG, 2012)
ELIMINATE all ignition sources (no smoking, flares, sparks or flames in immediate area). Do not touch damaged containers or spilled material unless wearing appropriate protective clothing. Stop leak if you can do it without risk. Prevent entry into waterways, sewers, basements or confined areas. Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers. DO NOT GET WATER INSIDE CONTAINERS. (ERG, 2012)
|QC = Tychem QC|
|SL = Tychem SL|
|TF = Tychem F|
|TP = Tychem ThermoPro|
|C3 = Tychem CPF 3|
|BR = Tychem BR|
|LV = Tychem LV|
|RC = Tychem Responder® CSM|
|TK = Tychem TK|
|RF = Tychem Reflector®|
|Caustic potash (45%)||1310-58-3||Liquid||>480||>480||>480||>480||>480||>480||>480||>480||>480||>480|
|KOH (Potassium hydroxide) (45%)||1310-58-3||Liquid||>480||>480||>480||>480||>480||>480||>480||>480||>480||>480|
|Potash lye (45%)||1310-58-3||Liquid||>480||>480||>480||>480||>480||>480||>480||>480||>480||>480|
|Potassium hydroxide (45%)||1310-58-3||Liquid||>480||>480||>480||>480||>480||>480||>480||>480||>480||>480|
Special Warnings from DuPont
- Serged and bound seams are degraded by some hazardous liquid chemicals, such as strong acids, and should not be worn when these chemicals are present.
CAUTION: This information is based upon technical data that
DuPont believes to be reliable. It is subject to revision as
additional knowledge and experience are gained. DuPont makes no
guarantee of results and assumes no obligation or liability...
... in connection with this information. It is the user's responsibility to determine the level of toxicity and the proper personal protective equipment needed. The information set forth herein reflects laboratory performance of fabrics, not complete garments, under controlled conditions. It is intended for informational use by persons having technical skill for evaluation under their specific end-use conditions, at their own discretion and risk. Anyone intending to use this information should first verify that the garment selected is suitable for the intended use. In many cases, seams and closures have shorter breakthrough times and higher permeation rates than the fabric. Please contact DuPont for specific data. If fabric becomes torn, abraded or punctured, or if seams or closures fail, or if attached gloves, visors, etc. are damaged, end user should discontinue use of garment to avoid potential exposure to chemical. Since conditions of use are outside our control, we make no warranties, express or implied, including, without limitation, no warranties of merchantability or fitness for a particular use and assume no liability in connection with any use of this information. This information is not intended as a license to operate under or a recommendation to infringe any patent or technical information of DuPont or others covering any material or its use.
EYES: flush with water for at least 15 min.
SKIN: flush with water, then rinse with dilute vinegar (acetic acid).
INGESTION: give water and milk. Do NOT induce vomiting. Call physician at once, even when injury seems to be slight. (USCG, 1999)
See also the Levels of Concern guide for information on AEGLs, ERPGs, PACs, and IDLH values.
List of data sources.
AEGLs (Acute Exposure Guideline Levels)No AEGL information available.
ERPGs (Emergency Response Planning Guidelines)No ERPG information available.
PACs (Protective Action Criteria)
|Potassium hydroxide (1310-58-3)||0.18 mg/m3||2 mg/m3||54 mg/m3|
EPA Consolidated List of Lists
|Regulatory Name||CAS Number/
313 Category Code
|CERCLA RQ||EPCRA 313
(EPA List of Lists, 2015)
DHS Chemical Facility Anti-Terrorism Standards (CFATS)No regulatory information available.
Alternate Chemical Names
- CAUSTIC POTASH
- CAUSTIC POTASH SOLUTION
- CAUSTIC POTASH, LIQUID
- CYANTEK CC 723
- POTASSIUM HYDROXIDE
- POTASSIUM HYDROXIDE (LYE)
- POTASSIUM HYDROXIDE SOLUTION
- POTASSIUM HYDROXIDE, SOLUTION
- POTASSIUM HYDROXIDE, [LIQUID]