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Calcium Nitrite
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Calcium Nitrite is an inorganic compound commonly supplied as a white crystalline powder or granules. It serves primarily as a corrosion inhibitor in reinforced concrete structures, protecting steel reinforcement from rust and prolonging structural lifespan. Calcium nitrite is also used in various industrial processes as an oxidizing agent and preservative. Due to its high solubility in water and strong oxidizing properties, it effectively prevents chloride-induced corrosion and improves concrete durability.
Description
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Calcium Nitrite
Primary UsesÂ
- Construction & Civil Engineering
- Used as a corrosion inhibitor in reinforced concrete to protect steel rebars from chloride-induced corrosion.
- Added to concrete mixes to enhance durability and prevent premature deterioration, especially in marine and industrial environments.
- Helps in extending the service life of concrete structures such as bridges, tunnels, and parking garages.
- Industrial Applications
- Employed as an oxidizing agent in various chemical manufacturing processes.
- Acts as a nitrosating agent and preservative in some industrial and food applications (subject to regulatory approval).
Secondary UsesÂ
- Water Treatment
- Used occasionally as a biocide and corrosion inhibitor in cooling water systems and boilers.
- Agriculture
- Sometimes incorporated in fertilizers to provide nitrogen in nitrite form and improve nitrogen efficiency (limited use).
PRODUCT KEY FEATURES
 Basic Identification Attributes
- Chemical Name (IUPAC): Calcium dinitrite
- Common/Trade Name: Calcium Nitrite
- CAS Number: 13780-06-8
- HS Code: 2834.29.00
- Molecular Formula: Ca(NOâ‚‚)â‚‚
- Synonyms:
- Calcium dinitrite
- Calcium nitrite salt
- Calcium(II) nitrite
2. Physical & Chemical Properties
- Physical State: Crystalline powder or granules
- Color & Odor: White to off-white; odorless
- Melting Point: Decomposes at ~400°C
- Boiling Point: Not applicable (decomposes)
- Density: Approx. 2.18 g/cm³ (anhydrous)
- Solubility: Highly soluble in water (~81 g/100 mL at 20°C); insoluble in alcohol
- pH: Slightly alkaline in aqueous solution (pH ~9–10)
- Stability: Stable when dry; sensitive to moisture and heat
3. Safety & Hazard Attributes
- Hazard Class (GHS): Oxidizing solid (Category 3); harmful if swallowed or inhaled
- NFPA Ratings:
- Health: 2
- Flammability: 0
- Reactivity: 1
- Exposure Limits: Avoid inhalation of dust; no specific OSHA PEL but general dust limits apply
- Toxicity: Moderate toxicity; ingestion or inhalation may cause irritation to respiratory and digestive tracts
- Reactivity: Strong oxidizer; reacts with reducing agents and combustible materials
4. Storage & Handling Attributes
- Storage Conditions: Store in a cool, dry, well-ventilated area away from organic materials and acids
- Container Type: Sealed polyethylene bags, drums, or bulk containers
- Shelf Life: Typically 1–2 years under proper storage conditions
- Special Handling: Use PPE; avoid dust formation and contact with incompatible substances
5. Regulatory & Compliance Attributes
- FDA Status: Not approved as a food additive; used primarily in industrial applications
- Transportation: Classified as an oxidizer (UN number 1446)
- Waste Disposal: Follow local regulations for oxidizing chemical disposal
6. Environmental & Health Impact
- Ecotoxicity: Potentially harmful to aquatic organisms in high concentrations
- Persistence: Water-soluble and mobile in the environment; does not bioaccumulate
- Carcinogenicity/Mutagenicity: Not classified as carcinogenic or mutagenic
- Biodegradability: Inorganic compound; not biodegradable
SAFETY HANDLING PRECAUTIONS
Personal Protective Equipment (PPE):
- Gloves
- Safety goggles
- Dust mask or respirator (when handling powder)
- Protective clothing
Handling Measures:
- Avoid inhalation and ingestion
- Work in well-ventilated areas
- Avoid contact with incompatible materials (organic substances, acids)
Storage Measures:
- Keep containers tightly sealed
- Store away from moisture, heat, and reducing agents
Hygiene Practices:
- Wash hands thoroughly after handling
- Do not eat, drink, or smoke in handling areas
First Aid Measures
- Inhalation: Move to fresh air; seek medical attention if respiratory irritation or difficulty occurs
- Skin Contact: Wash affected area with soap and water; seek medical advice if irritation persists
- Eye Contact: Rinse eyes with plenty of water for at least 15 minutes; seek medical attention if irritation continues
- Ingestion: Do not induce vomiting; rinse mouth and seek immediate medical attention
Firefighting Measures
- Fire Hazards: Supports combustion; strong oxidizer
- Extinguishing Media: Use water spray, foam, or dry chemical extinguishers
- Special Precautions: Firefighters should wear full protective gear and self-contained breathing apparatus (SCBA)
- Decomposition Products: May release toxic nitrogen oxides and calcium oxides upon heating
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