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Sodium Hydroxide, Solid (Lye)

Considered dangerous good. We cannot ship this out via regular post

Some courier companies will accept shipment for an extra dangerous good fee (on top of the cost of shipping). Dan Foss Couriers will deliver locally, within BC - Call 604-524-5959 to verify shipping charges. 

We will provide a copy of the MSDS with shipment. 

Used in cold process soap making to saponify fats. External use only. Extreme caution. Work in well ventilated area, wearing gloves, mask and goggles. Keep vinegar handy to neutralize if splashed on skin. 


Wear protective clothing: Apron, Goggles, respirator, gloves.

Trade Name: Caustic soda micro pearls 

Synonym: Caustic flake, caustic soda, lye, soda lye. 

Chemical Name: Sodium Hydroxide 95-99% 

CAS Number: Sodium Hydroxide 1310-73-2 

Chemical Formula: NaOH 

Chemical Family: Alkali hydroxide 

Inhalation: Dusts or mists cause severe irritation of respiratory tract which may have the following effects: mild irritation of mucous membranes, severe pneumonitis, and destruction of lung tissue. May cause pulmonary edema. 

Skin Contact/Absorption: Contact causes severe burning and frequently deep ulcerations result with subsequent scarring. Prolonged contact destroys tissue. Contact with dust or mist can cause multiple burns with temporary loss of hair at burn site. Dust or mist can cause irritant dermatitis. Solutions of up to 4% in water may not cause irritation and burning for several hours, while 25 - 50% solutions can cause these effects in less than 3 minutes. 

Eye Contact: Extremely corrosive to the eyes. Contact with small quantities can result in permanent blindness. Penetrate deeply causing severe burns, corneal scarring, and clouding. In severe cases, glaucoma, cataracts and permanent blindness may occur. 

Ingestion: Causes very serious damage to the mucous membranes and or other tissues in the digestive tract and may be fatal. Burning of the mouth, throat and oesophagus, vomiting, diarrhea, edema (swelling) of larynx and subsequent suffocation. Perforation of gastrointestinal tract can occur. 

Exposure Limits: Ceiling Exposure Limit (TLV-C): 2 mg/m3 over 8 hours (ACGIH) 


Inhalation: Remove victim to fresh air. Give artificial respiration only if breathing has stopped. If breathing is difficult, give oxygen. Seek immediate medical attention. 

Skin Contact/Absorption: Remove contaminated clothing. Wash affected area with soap and water. Seek medical attention if irritation occurs or persists. 

Eye Contact: Flush immediately with water for at least 20 minutes. Forcibly hold eyelids apart to ensure complete irrigation of eye tissue. Seek immediate medical attention. 

Ingestion: Give large amounts of water or acidic beverages (tomato, apple, or orange juice, carbonated beverages such as Coke or Pepsi). Do not induce vomiting. If vomiting occurs, lean victim forward to prevent breathing in vomit and give more water or acidic beverage to drink. Do not give anything by mouth to an unconscious or convulsing person. Seek immediate medical attention. 

Additional Information: Doctors should treat symptomatically.