Difference between revisions of "MSDS - Potassium hydroxide"

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<td>Properties</td>
 
<td>Properties</td>
 
<td>
 
<td>
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*Form: White semi-transparent flaky solid  
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*Form: White semi-transparent flaky solid.
 
*Stability: Stable, but hygroscopic. Absorbs carbon dioxide from the air.  
 
*Stability: Stable, but hygroscopic. Absorbs carbon dioxide from the air.  
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*Melting point: 360 C
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*Melting point: 360°C
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*Water solubility: high (dissolution is very exothermic)  
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*Water solubility: high (dissolution is very exothermic).
 
*Specific gravity: 2.04  
 
*Specific gravity: 2.04  
 
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<td>Principal hazards</td>
 
<td>Principal hazards</td>
 
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*Contact with the eyes can cause serious long-term damage  
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*Contact with the eyes can cause serious long-term damage.
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*The solid and its solutions are corrosive  
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*The solid and its solutions are corrosive.
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*A significant amount of heat is released when potassium hydroxide dissolves in water; this may be sufficient to crack thin glassware if the solution is not stirred when dissolving the solid  
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*A significant amount of heat is released when potassium hydroxide dissolves in water; this may be sufficient to crack thin glassware if the solution is not stirred when dissolving the solid.
 
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*Eye contact: Immediately flush the eye with plenty of water. Continue for at least ten minutes and call for immediate medical help.  
 
*Eye contact: Immediately flush the eye with plenty of water. Continue for at least ten minutes and call for immediate medical help.  
 
*Skin contact: Wash off with plenty of water. Remove any contaminated clothing. If the skin reddens or appears damaged, call for medical aid.  
 
*Skin contact: Wash off with plenty of water. Remove any contaminated clothing. If the skin reddens or appears damaged, call for medical aid.  
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If swallowed: Drink plenty of water and call for immediate medical help.
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*If swallowed: Drink plenty of water and call for immediate medical help.
 
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<td>
 
<td>
 
*Small amounts of dilute potassium hydroxide can be flushed down a sink with a large quantity of water, unless local rules prohibit this.
 
*Small amounts of dilute potassium hydroxide can be flushed down a sink with a large quantity of water, unless local rules prohibit this.
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*Larger amounts should be neutralised before disposal. . </td>
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*Larger amounts should be neutralised before disposal.</td>
 
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<td> Further information </td>
 
<td> Further information </td>
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<td>[http://ptcl.chem.ox.ac.uk/~hmc/hsci/chemicals/hsci_chemicals_list.html More extensive safety data]</td>
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<td>[http://msds.chem.ox.ac.uk/PO/potassium_hydroxide.html More extensive safety data]</td>
 
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Latest revision as of 20:14, 20 February 2013

  • Symbol - corrosive.jpg
  • Symbol - harmful.jpg










Potassium Hydroxide material data safety sheet. Reproduced with kind permission of the Department of Chemistry, Oxford University.

Last updated January 18, 2007


Common synonyms
  • Caustic potash
  • Lye
Formula KOH
Properties
  • Form: White semi-transparent flaky solid.
  • Stability: Stable, but hygroscopic. Absorbs carbon dioxide from the air.
  • Melting point: 360°C
  • Water solubility: high (dissolution is very exothermic).
  • Specific gravity: 2.04
Principal hazards
  • Contact with the eyes can cause serious long-term damage.
  • The solid and its solutions are corrosive.
  • A significant amount of heat is released when potassium hydroxide dissolves in water; this may be sufficient to crack thin glassware if the solution is not stirred when dissolving the solid.
Safe handling
  • Always wear safety glasses.
  • Do not allow solid or solution to come into contact with your skin.
  • When preparing solutions swirl the liquid gently to prevent "hot spots" developing.
Emergency
  • Eye contact: Immediately flush the eye with plenty of water. Continue for at least ten minutes and call for immediate medical help.
  • Skin contact: Wash off with plenty of water. Remove any contaminated clothing. If the skin reddens or appears damaged, call for medical aid.
  • If swallowed: Drink plenty of water and call for immediate medical help.
Disposal
  • Small amounts of dilute potassium hydroxide can be flushed down a sink with a large quantity of water, unless local rules prohibit this.
  • Larger amounts should be neutralised before disposal.
Protective equipment
  • ALWAYS wear safety glasses when handling potassium hydroxide or its solutions. For many chemicals safety glasses are needed because when the chemical gets in the eye it causes irritation; by contrast, potassium hydroxide can cause serious damage.
  • If you need gloves, neoprene, nitrile or natural rubber are suitable for handling solutions at concentrations of up to 70%.
Further information More extensive safety data


Bio-rich-time-poor 21:07, 25 June 2011 (BST)

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