Calcium Nitrate Tetrahydrate Extra Pure
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Calcium Nitrate Tetrahydrate Extra Pure is a crystalline, highly soluble laboratory-grade compound widely used as a source of calcium ions in analytical chemistry, solution preparation, and coordination studies. Its tetravalent hydrate form allows for controlled moisture content, making it ideal for reproducible experimental setups. This salt is frequently employed in qualitative tests for fluoride and carbonate ions, and in synthesis involving double displacement reactions. In teaching laboratories, it is also used to demonstrate solubility principles and endothermic dissolution behavior. The extra pure quality ensures minimal interference from contaminants, supporting high-precision research and reliable analytical results. It should be stored in a cool, dry environment to prevent caking and preserve its reactivity.
Calcium Nitrate Tetrahydrate Extra Pure
Primary Uses
- Precursor for Calcium-Based Compounds
- Used to synthesize calcium salts (e.g., calcium carbonate, calcium oxalate) by double displacement or precipitation reactions.
- Analytical Reagent
- Serves as a source of Ca²⁺ ions in qualitative and quantitative tests, especially in studies involving ionic equilibria or complexometric titrations.
- Fertilizer Studies in Agricultural Labs
- Used in research labs to simulate or analyze the behavior of nitrate-based fertilizers, especially in plant growth experiments.
- Teaching and Demonstration Experiments
- Employed in solubility and ionic reaction demonstrations in chemistry education settings, showing nitrate solubility and calcium ion reactions.
Secondary Uses
- Heat Pack Reaction Studies
- Involved in endothermic or exothermic reaction investigations due to its dissolution characteristics.
- Electrochemical Research
- Occasionally used in electrolyte formulations or salt bridge solutions due to high solubility and ionic conductivity.
- Synthesis of Coordination Complexes
- Acts as a calcium source in experiments involving the formation of metal-ligand complexes.
1. Basic Identification Attributes
- Chemical Name: Calcium Nitrate Tetrahydrate
- Chemical Formula: Ca(NO₃)₂·4H₂O
- CAS Number: 13477-34-4
- HS Code: 2834.29.90
- Grade: Extra Pure (Laboratory Grade)
- Synonyms: Norwegian Saltpeter, Calcium dinitrate tetrahydrate
2. Physical & Chemical Properties
- Appearance: Colorless, transparent crystalline solid
- Odor: Odorless
- Molar Mass: 236.15 g/mol
- Melting Point: ~45–50 °C (decomposes)
- Density: ~1.82 g/cm³
- Solubility: Highly soluble in water and alcohol
- pH (5% solution): ~4.5–6.5
- Reactivity: Oxidizing agent; may intensify combustion
3. Safety & Hazard Attributes
- GHS Classification:
- Oxidizing Solids (Category 3)
- Eye Irritation (Category 2)
- Hazard Statements:
- H272: May intensify fire; oxidizer
- H319: Causes serious eye irritation
- Precautionary Statements:
- Keep away from heat and flammable materials
- Wear protective gloves and eye protection
- Wash thoroughly after handling
4. Storage & Handling Attributes
- Storage Conditions:
- Store in a cool, dry, and well-ventilated area
- Keep container tightly closed and away from reducing agents
- Packaging: Plastic or glass jars with moisture-resistant sealing
- Handling Precautions:
- Avoid contact with skin and eyes
- Handle in a fume hood if dust is generated
- Prevent contamination with combustible materials
5. Regulatory & Compliance Attributes
- Transport Classification:
- Not classified as a dangerous good under most lab shipping regulations in small quantities
- Disposal Considerations:
- Dilute with water and neutralize before disposal
- Follow local regulations for nitrate-containing waste
6. Environmental & Health Impact
- Toxicity:
- May cause mild irritation on contact with skin or eyes
- Inhalation of dust may cause respiratory tract irritation
- Ecotoxicity:
- Can contribute to eutrophication of water bodies
- Nitrate ions are mobile in soil and can affect groundwater
- Biodegradability: Inorganic; not biodegradable
SAFETY PRECAUTIONS
- Personal Protective Equipment (PPE):
- Wear safety goggles, gloves, and a lab coat.
- Use in a well-ventilated area or fume hood.
- Handling:
- Avoid contact with skin, eyes, and clothing.
- Minimize dust generation and accumulation.
- Avoid mixing with combustible or organic materials — it is a strong oxidizer.
- Storage:
- Store in a cool, dry, well-ventilated area, away from incompatible substances like reducing agents or fuels.
- Keep container tightly sealed and protected from moisture and heat.
FIRST AID MEASURES
- Inhalation:
- Move person to fresh air.
- Seek medical attention if respiratory irritation or symptoms develop.
- Skin Contact:
- Wash skin thoroughly with soap and water for at least 15 minutes.
- Remove contaminated clothing.
- Eye Contact:
- Flush eyes with plenty of water for at least 15 minutes, holding eyelids open.
- Seek immediate medical attention.
- Ingestion:
- Rinse mouth.
- Do not induce vomiting.
- Seek immediate medical attention.
FIRE FIGHTING MEASURES
- Flammability:
- Not flammable by itself but is a strong oxidizer and can intensify fires.
- Extinguishing Media:
- Use water spray, foam, or dry chemical.
- Do NOT use dry combustible materials like sawdust.
- Hazardous Combustion Products:
- May release nitrogen oxides (NOₓ) and calcium oxides when decomposed by fire.
- Firefighter Protection:
- Wear self-contained breathing apparatus (SCBA) and full protective gear.
- Approach with caution and from upwind.
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