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Calcium Carbonate Light
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Calcium Carbonate Light is a finely ground, low bulk density natural mineral composed primarily of calcium carbonate (CaCO₃). Compared to standard grades, it has a lower density and larger particle size distribution, making it suitable for applications where light weight and high brightness are important. This form is extensively used as a filler and extender in industries such as plastics, paints, rubber, paper, adhesives, and construction materials to improve opacity, brightness, and texture, while maintaining low weight and cost efficiency. Its chemical inertness and whiteness provide functional and aesthetic advantages across formulations.
Description
Primary Uses
- Plastics Industry
- Used as a lightweight filler in polypropylene, polyethylene, and other polymers to reduce weight without compromising mechanical properties.
- Improves surface finish and opacity in molded and extruded plastic products.
- Reduces production costs by partially replacing expensive polymers.
- Paints and Coatings
- Functions as a pigment extender to enhance whiteness, brightness, and opacity in water-based and solvent-based paints.
- Controls rheology and improves film durability and resistance.
- Rubber Industry
- Incorporated as a filler to improve softness, whiteness, and processability of rubber products.
- Enhances tensile strength and abrasion resistance in some compounds.
- Paper Industry
- Used to increase brightness, opacity, and print quality in paper and paperboard products.
- Construction Materials
- Acts as a lightweight filler in plasters, cement, and mortar, improving texture and reducing shrinkage.
Secondary Uses
- Adhesives and Sealants
- Adds body and improves consistency in adhesive formulations.
- Cosmetics
- Used as a pigment and absorbent in powders and creams (subject to purity and regulatory compliance).
- Agriculture
- Sometimes used as a soil conditioner to modify pH and supply calcium.
PRODUCT KEY FEATURES
1. Basic Identification Attributes
- Chemical Name (IUPAC): Calcium carbonate
- Common/Trade Name: Calcium Carbonate Light
- CAS Number: 471-34-1
- HS Code: 2836.50.00
- Molecular Formula: CaCO₃
- Synonyms:
- Light calcium carbonate
- Low bulk density calcium carbonate
- Soft calcium carbonate
2. Physical & Chemical Properties
- Physical State: Fine white powder
- Color & Odor: White; odorless
- Bulk Density: Lower than standard grades, approx. 0.5–0.8 g/cm³ (varies by supplier)
- Particle Size: Larger and less dense than heavy grades; often micron-sized or larger particles
- Specific Surface Area: Lower surface area compared to heavy grades
- Density: True density approx. 2.7–2.8 g/cm³
- Solubility: Insoluble in water; reacts with acids releasing CO₂ gas
- pH: Slightly alkaline (pH ~9 in aqueous suspension)
- Melting Point: Decomposes at ~825°C with CO₂ release
- Stability: Chemically inert and stable under standard conditions
3. Safety & Hazard Attributes
- Hazard Class (GHS): Not hazardous; nuisance dust
- NFPA Ratings:
- Health: 1
- Flammability: 0
- Reactivity: 0
- Exposure Limits: OSHA PEL: 15 mg/m³ total dust
- Toxicity: Low acute toxicity; inhalation of dust can cause mild respiratory irritation
- Reactivity: Stable; reacts with acids releasing carbon dioxide
4. Storage & Handling Attributes
- Storage Conditions: Store in a dry, cool, well-ventilated area
- Container Type: Supplied in bags or bulk containers with dust control
- Shelf Life: Indefinite when stored properly
- Special Handling: Use dust control measures and PPE to prevent inhalation
5. Regulatory & Compliance Attributes
- FDA Status: Depending on purity, may be suitable for indirect food contact and pharmaceutical use (verify regulatory status)
- Transportation: Not regulated as hazardous material
- Waste Disposal: Dispose as non-hazardous industrial waste per local laws
6. Environmental & Health Impact
- Ecotoxicity: Minimal environmental risk; naturally occurring mineral
- Persistence: Persistent in the environment; chemically inert
- Bioaccumulation: Not expected to bioaccumulate
- Carcinogenicity/Mutagenicity: Not classified as carcinogenic or mutagenic
- Biodegradability: Not biodegradable
SAFETY HANDLING PRECAUTIONS
Safety Handling Precautions
Personal Protective Equipment (PPE):
- Dust mask or respirator (NIOSH-approved)
- Gloves
- Safety goggles
- Protective clothing
Handling Measures:
- Avoid dust generation and inhalation
- Use local exhaust ventilation
- Handle in well-ventilated areas
Storage Measures:
- Keep containers sealed and dry
- Protect from moisture and acids
Hygiene Practices:
- Wash hands thoroughly after handling
- Avoid eating, drinking, or smoking during use
First Aid Measures
- Inhalation: Move to fresh air; seek medical attention if respiratory symptoms develop
- Skin Contact: Wash skin with soap and water; seek medical help if irritation occurs
- Eye Contact: Rinse eyes with plenty of water for 15 minutes; get medical advice if irritation persists
- Ingestion: Low toxicity; rinse mouth and seek medical help if large quantities ingested
Firefighting Measures
- Fire Hazards: Non-flammable
- Extinguishing Media: Water spray, foam, dry chemical, or CO₂ as appropriate
- Special Precautions: None specific
- Decomposition Products: Carbon dioxide released under extreme heat
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