Calcium hydroxide, also known as slaked lime or hydrated lime, is a widely used chemical compound with numerous applications in various industries. Understanding its safety profile is crucial for handling and using it responsibly. This comprehensive safety data sheet (SDS) provides essential information to ensure safe handling, storage, and disposal of calcium hydroxide.
Note: This information is for general guidance only and should not be considered a substitute for a complete SDS from the manufacturer of the specific calcium hydroxide product you are using. Always consult the manufacturer's SDS for the most accurate and up-to-date information. The specific hazards and precautions may vary depending on the concentration and formulation of the calcium hydroxide.
Identifying Calcium Hydroxide
Chemical Name: Calcium hydroxide Chemical Formula: Ca(OH)₂ CAS Number: 1305-62-0 RTECS Number: EO5250000 Synonyms: Slaked lime, hydrated lime, calcium dihydroxide
Hazards Identification
Calcium hydroxide presents several hazards, primarily related to its corrosive and irritant properties. The severity of these hazards depends on the concentration and form of the calcium hydroxide.
Health Hazards:
- Skin contact: Can cause irritation, burns, and inflammation. Prolonged or repeated contact can lead to skin cracking and dryness.
- Eye contact: Can cause severe irritation, burning, and potential damage to the cornea.
- Inhalation: Inhalation of dust or powder can irritate the respiratory tract, causing coughing, sneezing, and shortness of breath. High concentrations can cause more severe respiratory problems.
- Ingestion: Ingestion can cause irritation and burns to the mouth, throat, and esophagus. Severe ingestion can lead to gastrointestinal distress and systemic effects.
Environmental Hazards:
While not acutely toxic to the environment, large quantities of calcium hydroxide can alter soil pH and water quality. Proper disposal methods are essential.
Composition/Information on Ingredients
Calcium hydroxide is the primary ingredient. Other ingredients may be present depending on the specific product formulation (e.g., additives, stabilizers). Always refer to the manufacturer's SDS for a complete list of ingredients and their respective concentrations.
First-aid Measures
Eye contact: Immediately flush eyes with plenty of water for at least 15 minutes, lifting the eyelids occasionally. Seek medical attention. Skin contact: Remove contaminated clothing and wash the affected area with plenty of soap and water. Seek medical attention if irritation persists. Inhalation: Remove the person to fresh air. If breathing is difficult, administer oxygen. Seek medical attention. Ingestion: Do NOT induce vomiting. Rinse mouth with water. Seek immediate medical attention.
Fire-fighting Measures
Calcium hydroxide is not flammable. However, appropriate fire-fighting procedures should be followed for any surrounding materials.
Accidental Release Measures
Small Spills: Carefully sweep up the spill using a dustpan and brush, avoiding skin contact. Dispose of the collected material according to local regulations. Large Spills: Evacuate the area and contact emergency services. Use appropriate personal protective equipment (PPE) to contain and clean up the spill.
Handling and Storage
- Avoid skin and eye contact.
- Wear appropriate PPE, including gloves, eye protection, and respiratory protection (if dust is present).
- Store in a cool, dry, well-ventilated area away from incompatible materials.
- Keep containers tightly closed.
- Prevent contamination of water sources.
Exposure Controls/Personal Protection
- Respiratory Protection: Use appropriate respirators when handling dust or powder.
- Eye Protection: Wear chemical splash goggles or face shield.
- Skin Protection: Wear chemical-resistant gloves and protective clothing.
- Engineering Controls: Use local exhaust ventilation to control dust exposure.
Physical and Chemical Properties
- Appearance: White powder or crystalline solid.
- Odor: Odorless.
- pH: Highly alkaline (around 12.4 in a 1% solution).
- Solubility: Slightly soluble in water.
Stability and Reactivity
Calcium hydroxide is generally stable under normal conditions. However, it can react violently with acids. Avoid contact with strong acids.
Toxicological Information
Calcium hydroxide is corrosive and irritant. Acute exposure can cause skin and eye irritation, respiratory problems, and gastrointestinal distress. Chronic exposure can lead to skin damage and respiratory problems. Refer to the manufacturer's SDS for more detailed toxicological information.
Ecological Information
Calcium hydroxide is not considered acutely toxic to aquatic organisms. However, large discharges can affect water pH and may harm aquatic life. Proper disposal methods are essential.
Disposal Considerations
Dispose of calcium hydroxide according to local, regional, and national regulations.
Transport Information
Transportation regulations vary depending on the quantity and mode of transport. Refer to the appropriate transport regulations for detailed information.
Regulatory Information
Compliance with all applicable local, regional, and national regulations is required.
Other Information
This safety data sheet provides general information. Always refer to the manufacturer's SDS for specific details about the product you are using. This information is not exhaustive and should not be considered a substitute for professional safety training.
This SDS is intended to provide a comprehensive overview of calcium hydroxide safety. Remember to always consult the manufacturer's SDS for product-specific information. Safe handling practices are paramount in preventing accidents and ensuring workplace safety.
