Calcium Oxide, CaO,

2.1 Classification of the substance or mixture

Eye Damage Category 1, Skin Irritation Category 2, Specific Target Organ Toxicity Single Exposure Category 3 (Respiratory System), Carcinogen 1. Emergency Overview: Quicklime is an odorless white or grayish-white material that ranges from an aggregate size to a granular powder. Contact can cause irritation to eyes, skin, respiratory system, and gastrointestinal tract. Quicklime reacts violently with water, releasing heat which may ignite combustible materials in certain instances.

Potential health effects

Eyes: Contact can cause severe irritation or burning of eyes, including permanent damage. Skin: Contact can cause severe irritation or burning of skin, especially in the presence of moisture. Ingestion: This product can cause severe irritation or burning of gastrointestinal tract if swallowed. Inhalation: This product can cause severe irritation of the respiratory system. Long-term exposure may cause permanent damage. Quicklime is not listed by MSHA, OSHA, or IARC as a carcinogen, but this product may contain trace amounts of crystalline silica in the form of quartz or crystobalite, which has been classified by IARC as (Group I) carcinogenic to humans when inhaled. Inhalation of silica can also cause a chronic lung disorder, silicosis.

Medical Conditions Generally Aggravated by Exposure

Contact may aggravate disorders of eyes, skin, gastrointestinal tract, and respiratory system.

Environmental effects

This material is alkaline and if released into water or moist soil will cause an increase in pH.

Signal word

Danger 1

Hazard statements

Danger! Causes skin irritation. Causes serious eye damage. May cause cancer through inhalation. May cause respiratory irritation. Reacts violently with water releasing heat which can ignite combustible materials.

Precautionary statements

Wear protective gloves and proper clothing. Wash exposed skin thoroughly after handling. Avoid breathing dust. Use only outdoors or in a well-ventilated area. Keep only in original container. Obtain special instructions before use. Do not handle until all safety precautions have been read and understood. If on skin; Wash exposed skin with plenty of water. If skin irritation occurs, seek medical attention. Take off contaminated clothing and wash it before reuse. If in eyes: Always wear Safety Glasses or Goggles. Do not rub your eye(s). Rinse cautiously with water for at least 15 minutes. Contact lens should not be worn, but if they are worn, remove contact lenses (if present) and continue rinsing. Seek medical attention immediately. In Inhaled: Remove person(s) to fresh air and keep comfortable for breathing. Seek medical attention if you feel unwell. If exposed or concerned: Get medical advice. Store in a corrosive resistant container. Do not store or ship (ground only) in aluminum containers. Dispose of contents or containers in accordance with applicable regulations. Do not use water on material spills.

2.3 Other hazards

Calcium oxide reacts violently with water, releasing heat which can ignite combustible materials.

Ingredient(s) with unknown acute toxicity

Not Applicable