Lead Drier
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Lead Drier is a chemical additive primarily used in the coatings and paints industry to accelerate the drying and curing process of oil-based paints, varnishes, and coatings. It functions as a catalytic agent that promotes the oxidative polymerization of drying oils, reducing the drying time and improving the film formation. Lead driers are traditionally lead-based salts such as lead naphthenate or lead octoate, valued for their effectiveness at low concentrations. Due to toxicity concerns, their use is increasingly regulated and often replaced by safer alternatives.
Categories: Additives, Catalysts, Driers
Tags: Lead Drier, Lead-Based Drier, Metallic Drier, Oxidation Catalyst, Paint Drier, Paint Hardener
Description
Lead Drier
Primary Uses
- Paints and Coatings Industry
- Accelerates drying of alkyd and oil-based paints and varnishes to improve productivity.
- Enhances hardness and durability of the dried paint film by promoting even curing.
- Used in primers, enamels, and industrial coatings to reduce tackiness and improve surface finish.
- Printing Inks
- Acts as a drying agent in certain ink formulations to reduce drying time and prevent smudging.
- Wood Finishing
- Speeds up drying of wood stains and varnishes, aiding in quicker processing and handling.
Secondary Uses
- Artist Paints
- Sometimes used in oil paints by artists to control drying times and improve workability.
- Adhesives and Sealants
- Incorporated into some solvent-based adhesives to hasten cure and set times.
- Industrial Applications
- Used as a catalyst in some polymer and resin curing processes where drying speed is critical.
PRODUCT KEY FEATURES
- Basic Identification Attributes
- Chemical Name (IUPAC): Lead (II) octoate or Lead naphthenate (varies by type)
- Common/Trade Name: Lead Drier; Lead Octoate; Lead Naphthenate
- CAS Number: Varies (e.g., Lead octoate ~ 301-02-0)
- HS Code: 2833.29.00 (Other lead compounds)
- Synonyms: Lead drying agent; drying accelerator; paint drier
- Physical & Chemical Properties
- Physical State: Viscous liquid or paste
- Color & Odor: Yellow to brownish; characteristic mild odor
- Solubility: Soluble in oils, solvents; insoluble in water
- Melting Point: Variable depending on formulation
- Density: Approx. 1.0 – 1.2 g/cm³
- Safety & Hazard Attributes
- GHS Classification: Toxic; harmful if swallowed or inhaled; causes skin and eye irritation; may cause long-term health effects
- Toxicity: Lead compounds are toxic and pose risks of lead poisoning with chronic exposure
- Exposure Limits: OSHA PEL for lead: 50 µg/m³ (airborne lead)
- Storage & Handling Attributes
- Storage Conditions: Store in tightly sealed containers in a cool, dry, well-ventilated area away from incompatible substances
- Container Type: Metal or heavy-duty plastic drums/containers resistant to corrosion
- Shelf Life: Typically 1-2 years if stored properly
- Handling Precautions: Use appropriate PPE including gloves, respiratory protection, and avoid inhalation or skin contact
- Regulatory & Compliance Attributes
- Subject to strict regulations due to lead toxicity (e.g., OSHA, REACH, EPA)
- Use restricted or banned in many countries for consumer products
- Must be labeled with hazard warnings and handled according to hazardous material guidelines
- Environmental & Health Impact
- Biodegradability: Not biodegradable; persists in the environment
- Ecotoxicity: Highly toxic to aquatic life; bioaccumulative
- Bioaccumulation: Lead accumulates in biological systems, posing environmental hazards
- Carcinogenicity/Mutagenicity: Classified as probable human carcinogen; causes reproductive toxicity
SAFETY HANDLING PRECAUTIONS
- Safety Handling Precautions
- PPE Required: Chemical-resistant gloves, protective clothing, eye protection, and respiratory protection in confined spaces
- Handling Guidelines: Use in well-ventilated areas or under fume extraction; avoid ingestion and inhalation
- Storage Measures: Store away from acids, oxidizers, and incompatible materials; prevent leaks and spills
- First Aid Measures
- Inhalation: Move to fresh air immediately; seek medical attention if symptoms occur
- Skin Contact: Wash affected area with soap and water; remove contaminated clothing; seek medical advice if irritation persists
- Eye Contact: Rinse eyes thoroughly with water for at least 15 minutes; obtain medical attention
- Ingestion: Do not induce vomiting; rinse mouth and seek urgent medical attention
- Firefighting Measures
- Fire Hazards: Combustible; may emit toxic fumes of lead and other hazardous gases when heated
- Extinguishing Media: Use dry chemical, foam, or CO2 extinguishers; avoid water streams that may spread contamination
- Special Precautions: Firefighters should wear full protective gear and self-contained breathing apparatus
- Hazardous Combustion Products: Lead oxides, carbon monoxide, carbon dioxide
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