Potassium Hydroxide (KOH, Caustic Potash) 90% Flakes

Potassium Hydroxide (KOH, Caustic Potash)  90% Flakes
*Please note that 25kg and over is exempt from the free shipping option as it is a class 8 Dangerous good.
It will incur extra shipping charges. Please email us for a shipping quote before placing your order.

High quality potassium hydroxide 90% flakes for use in the production of liquid soaps. Potassium hydroxide or Caustic Potash is used to convert fats and oils to soap. Potassium hydroxide is traditionally used to make softer soaps that dissolve more easily.
NZ$ 22.00 - 220.00
NZ$ 19.80 - 198.00
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CAS No: 1310-58-3


Other names: Caustic potash; potassium hydrate; lye

Usage: Manufacture of liquid soaps, paint and varnish removers



Classified as a Dangerous Good according to NZS 5433:2012 Transport of Dangerous Goods on Land.

Classified as hazardous according to criteria in the HS (Minimum Degrees of Hazard) Regulations 2001.

Hazard Statements

  • May be corrosive to metals
  • Toxic if swallowed
  • Causes severe skin burns and eye damage
  • Toxic to aquatic life
  • Toxic to terrestrial vertebrates


  • Keep out of reach of children
  • Keep only in original container
  • Do not breathe dust/fume/gas/mist/vapours/spray
  • Wash hands thoroughly after handling
  • Do not eat, drink or smoke when using this product
  • Wear protective gloves/protective clothing/eye protection/face protection
  • Avoid release to the environment

In emergency dial 111, and then ask for Fire, Ambulance or Police as necessary.

In case of poisoning phone National Poisons Centre – 0800 764 766.


Inhalation                                Remove victim from area of exposure - avoid becoming a casualty. Remove contaminated clothing and loosen remaining clothing. Allow patient to assume most comfortable position and keep warm. Keep at rest until fully recovered. If patient finds breathing difficult and develops a bluish discolouration of the skin (which suggests a lack of oxygen in the blood - cyanosis), ensure airways are clear of any obstruction and have a qualified person give oxygen through a face mask. Apply artificial respiration if patient is not breathing. Seek immediate medical advice.
Skin Contact If spilt on large areas of skin or hair, immediately drench with running water and remove clothing. Continue to wash skin and hair with plenty of water (and soap if material is insoluble) until advised to stop by the Poisons Information Centre or a doctor. For skin burns, cover with a clean, dry dressing until medical help is available.
Eye Contact Immediately wash in and around the eye area with large amounts of water for at least 15 minutes. Eyelids to be held apart. Remove clothing if contaminated and wash skin. Urgently seek medical assistance. Transport promptly to hospital or medical centre.
Ingestion Immediately rinse mouth with water. If swallowed, do NOT induce vomiting. Give a glass of water. Seek immediate medical assistance.
Indication of immediate medical attention and special treatment needed: Treat symptomatically. Can cause corneal burns.


Suitable Extinguishing Media              Not combustible, however, if material is involved in a fire use: Fine water spray, normal foam, dry agent (carbon dioxide, dry chemical powder).
Hazchem or Emergency Action Code 2W
Specific hazards arising from the chemical Corrosive substance. Non-combustible material.
Special protective equipment and precautions for fire-fighters Contact with metals may liberate hydrogen gas which is extremely flammable. Fire fighters to wear self-contained breathing apparatus and suitable protective clothing if risk of exposure to products of decomposition.


Emergency procedures/Environmental precautions                 Clear area of all unprotected personnel. If contamination of sewers or waterways has occurred advise local emergency services.
Personal precautions/Protective equipment/Methods and materials for containment and cleaning up Wear protective equipment to prevent skin and eye contact and breathing in dust. Work up wind or increase ventilation. Cover with damp absorbent (inert material, sand or soil). Sweep or vacuum up, but avoid generating dust. Collect and seal in properly labelled containers or drums for disposal.


Precautions for safe handling                      Avoid skin and eye contact and breathing in dust. Keep out of reach of children.
Conditions for safe storage, including any incompatibilities         Store in a cool, dry, well ventilated place. Store away from incompatible materials described in Section 10. Store away from foodstuffs. Keep containers closed when not in use - check regularly for spills.


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Merchant: NZ Soap and Candle
Address: 18 Maisey Place, Rotorua, New Zealand
Phone: +64 7 3439449
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