Bismuth Octoate CAS 67874-71-9 Low‑Toxicity Cobalt‑Free Auxiliary Drier for Alkyd
Bismuth Octoate CAS 67874‑71‑9 is liquid bismuth 2‑ethylhexanoate auxiliary drier. It is a low‑toxicity cobalt‑free metal carboxylate, mainly promoting deep‑layer through‑curing of alkyd paint film. Cooperated with iron or other cobalt‑free primary driers, it improves cross‑linking density, film hardness and chemical resistance. It avoids cobalt‑related regulatory risks and is widely used for low‑toxicity decorative alkyd paints, industrial protective enamels and cobalt‑free solvent‑borne alkyd
Product Overview
Bismuth Octoate CAS 67874‑71‑9 belongs to octoate‑series metal carboxylate auxiliary drier for air‑drying alkyd coating systems. It cannot realize independent drying function and must be compounded with suitable primary driers. As low‑toxicity cobalt‑free alternative auxiliary drier, it solves deep‑layer incomplete curing defects of cobalt‑free alkyd formulas. It enhances inner‑layer cross‑linking density of paint film, improves hardness and solvent resistance. It dissolves well in aliphatic and aromatic hydrocarbon solvents, maintains good compatibility with long‑oil and medium‑oil alkyd resins, keeps stable performance in finished paint storage and industrial batch‑to‑batch manufacturing.
Key Features
‑ Low‑toxicity metal carboxylate, cobalt‑free composition for environmental‑friendly coating requirements ‑ Excellent through‑curing auxiliary performance, improves inner‑layer cross‑linking of alkyd film ‑ Increases paint film hardness and solvent resistance for cobalt‑free alkyd formulations ‑ Perfect synergistic compatibility with iron‑based and other cobalt‑free primary driers ‑ Relatively low discoloration tendency for light‑colored coating systems ‑ Good solubility in mineral spirits, xylene and conventional coating hydrocarbon solvents ‑ Compliant with coating specifications restricting cobalt‑containing substances ‑ Reliable batch‑to‑batch consistency for low‑toxicity cobalt‑free alkyd paint production
Technical Specifications
‑ Product Name: Bismuth Octoate (Bismuth 2‑Ethylhexanoate) ‑ Bismuth Content: 24% min ‑ CAS No.: 67874‑71‑9 ‑ Appearance: Yellow‑brown transparent liquid ‑ Solubility: Soluble in aliphatic, aromatic hydrocarbon solvents and alkyd resins ‑ Density: 1.05‑1.11 g/cm³ @25℃ ‑ Viscosity: Low‑viscosity liquid ‑ Flash Point: ≥60℃ ‑ Moisture: ≤0.2%
Application Scenarios
‑ Cobalt‑free low‑toxicity solvent‑borne alkyd coating systems ‑ Decorative alkyd paints and light‑colored industrial protective enamels ‑ Long‑oil and medium‑oil alkyd formulations subject to cobalt regulatory limits ‑ Thick‑film alkyd coatings requiring improved deep‑layer curing property ‑ Composite drier system cooperating with iron‑based cobalt‑free primary driers
Usage Recommendation
‑ Typical dosage: 0.08%‑0.35% calculated on total paint weight (as metal bismuth) ‑ Premix fully with primary drier and other drier additives before adding into coating formula ‑ Do not add during high‑temperature resin synthesis procedure ‑ Standalone use is ineffective, matching cobalt‑free primary drier is mandatory ‑ Adjust dosage according to through‑curing test, hardness and chemical‑resistance evaluation ‑ Excessive dosage may trigger slight color shift; complete full‑set laboratory assessment before mass‑scale production
Package & Storage
‑ Standard package: 25kg / 200kg metal drum ‑ Store in cool, dry and well‑ventilated warehouse, keep away from heat source and open flame ‑ Tightly seal container after opening to prevent solvent volatilization and performance deterioration ‑ Shelf life: 12 months under proper storage conditions
Safety Notes
‑ Combustible liquid, keep away from all ignition sources. ‑ Avoid skin contact and eye splash. Wear chemical‑resistant gloves and safety goggles during handling. ‑ Avoid inhalation of vapor and mist, ensure effective local ventilation. ‑ Refer to SDS for full guidance on handling, transportation and emergency disposal.
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