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Whiting

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Whiting is a finely ground, white, chalky substance primarily composed of calcium carbonate (CaCO₃). It is widely used as a pigment, filler, and extender in various industrial and commercial applications. Whiting provides opacity, brightness, and smoothness to products, enhancing their appearance and physical properties. Its natural abundance and versatility make it an economical additive in multiple manufacturing processes.

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Category: Fillers and Reinforcements Tags: Calcium Carbonate Powder, Chalk Powder, Filler for Coatings, Ground Limestone, Polymer Reinforcement, Tile Adhesive, Whiting

Description

Table of Contents

Whiting

Primary Uses

Paints and Coatings Industry

Pigment & Filler: Used to improve opacity, whiteness, and consistency in paints, coatings, and primers.

Paper Industry

Filler: Enhances brightness, opacity, and printability of paper and cardboard products.

Rubber Industry

Filler: Improves mechanical properties, reduces cost, and enhances processing of rubber compounds.

Plastic Industry

Extender & Filler: Increases volume and improves surface finish in plastic products such as PVC.

Secondary Uses

Cosmetics

Ingredient: Used in powders and creams to provide opacity and absorb moisture.

Pharmaceuticals

Excipient: Acts as an inert filler in tablets and powders.

Agriculture

Soil Amendment: Used to adjust soil pH and improve soil structure in farming applications.

Construction

Component: Used in plasters, sealants, and as a mild abrasive in cleaning compounds.

KEY PRODUCT FEATURES

1. Basic Identification Attributes

Chemical Name (IUPAC): Calcium carbonate
Common/Trade Name: Whiting, Chalk, Calcium Carbonate Powder
CAS Number: 471-34-1
HS Code: 2521.00.00
Synonyms: Chalk, precipitated calcium carbonate (PCC), ground calcium carbonate (GCC)

2. Physical & Chemical Properties

Physical State: Fine white powder
Color & Odor: White, odorless
Particle Size: Typically less than 10 microns (varies by grade)
Solubility: Insoluble in water; soluble in dilute acids
Density: Approx. 2.7 g/cm³
pH: Neutral to slightly alkaline in aqueous suspension

3. Safety & Hazard Attributes

GHS Classification: Not classified as hazardous
Toxicity: Low toxicity; generally safe under normal handling
Exposure Limits: Avoid inhalation of dust; follow workplace dust exposure limits

4. Storage & Handling Attributes

Storage Conditions: Store in dry, well-ventilated areas away from moisture and contaminants
Container Type: Bags, bulk bags, or bulk storage silos
Shelf Life: Indefinite if kept dry and uncontaminated
Handling Precautions: Minimize dust generation; use dust masks if needed

5. Regulatory & Compliance Attributes

Complies with: Major industrial chemical regulations and REACH standards
Manufactured under: Good manufacturing practices for industrial grade materials
Suitable for: Industrial, cosmetic, and agricultural applications depending on grade

6. Environmental & Health Impact

Biodegradability: Naturally occurring mineral; environmentally benign
Ecotoxicity: Low risk to aquatic and terrestrial organisms
Bioaccumulation: Not applicable

SAFETY HANDLING PRECAUTIONS

Safety Handling Precautions

PPE Required: Dust mask and eye protection recommended when handling powders
Handling Guidelines: Use adequate ventilation to control dust; avoid inhalation
Storage Measures: Keep containers sealed to prevent moisture ingress

First Aid Measures

Inhalation: Move to fresh air; seek medical attention if breathing difficulty occurs
Skin Contact: Wash with water and soap if irritation develops
Eye Contact: Rinse eyes thoroughly with water; seek medical advice if irritation persists
Ingestion: Generally non-toxic; consult a physician if large quantities ingested

Firefighting Measures

Fire Hazards: Non-flammable
Extinguishing Media: Not applicable; use appropriate media for surrounding fire
Hazardous Combustion Products: None from whiting itself