Potassium Nonafluoro-1-butanesulfonate (CAS 29420-49-3), widely known as PFBSK or Potassium Perfluorobutane Sulfonate, is a white to yellowish crystalline powder. It is a perfluorinated anionic surfactant with a short carbon chain (C4). Potassium Nonafluoro-1-butanesulfonate (CAS 29420-49-3) is primarily utilized as a highly efficient flame retardant in polycarbonate (PC) resins. Because it is effective at extremely low loading levels, it allows the plastic to retain its natural transparency and mechanical properties, making it superior to traditional halogenated or phosphorus-based flame retardants for optical applications.

• High Efficiency at Low Loading: Achieves UL94 V-0 flame retardancy in PC at dosages as low as 0.06% to 0.10%.

• Maintains Transparency: Unlike mineral or phosphorus flame retardants, it does not cloud the resin, making it ideal for clear or colored PC sheets and components.

• Environmentally Preferred Alternative: As a C4 perfluorinated compound, it is the industry-standard replacement for the restricted long-chain (C8) PFOS-based flame retardants.

• Excellent Thermal Stability: Withstands the high processing temperatures (up to 300°C - 450°C) required for polycarbonate injection molding without decomposition.

• Superior Antistatic Properties: Provides long-lasting antistatic effects by reducing surface resistivity in various polymer and resin systems.

• Exceptional Purity (≥ 99.0%): Chemfine ensures strictly controlled ionic impurities and low moisture content to prevent polymer degradation.

Polycarbonate (PC) Flame Retardant

The primary additive for clear PC sheets, electronic housing, and lighting fixtures to meet strict fire safety standards (UL94 V-0) while maintaining glass-like clarity.

Antistatic Agent for Polymers

Used in the manufacturing of electronic packaging and cleanroom materials to prevent dust accumulation and electrostatic discharge (ESD).

Processing Aid and Surfactant

Functions as a high-temperature lubricant and processing aid in specialized fluoropolymer and thermoplastic elastomer (TPE) production.

Metal Surface Treatment

Utilized as a wetting agent and anti-mist agent in metal plating baths (especially in chrome plating) to improve coating uniformity.

Electronic Chemicals

Acts as a component in specialty photoresist formulations and as an electrolyte additive for certain advanced battery technologies.

Standard industrial packaging options for Potassium Nonafluoro-1-butanesulfonate include:

• 25kg fiber drums with double-layer PE moisture-proof inner bags (Standard export packaging).

• 500g or 1kg vacuum-sealed aluminum foil bags for laboratory R&D and pilot testing.

• All packaging is hermetically sealed to prevent moisture absorption and ensure a long shelf life during transit.

Potassium Nonafluoro-1-butanesulfonate is hygroscopic and sensitive to moisture. It must be stored in a cool, dry, and well-ventilated warehouse. Keep containers tightly sealed when not in use. Store in a dedicated area away from strong oxidizing agents and strong acids. Protect from direct sunlight and extreme heat to maintain the crystalline integrity. Properly stored in its original, unopened container, it has a shelf life of 24 months.

PFBSK, Rimar Salt, Potassium perfluorobutane sulfonate, K-PFBS, Perfluorobutane sulfonic acid potassium salt.

1. Perfluorobutanesulfonic Acid (PFBS) – CAS 375-73-5

2. Potassium Perfluorooctanesulfonate (PFOS-K) – CAS 2795-39-3

3. Bis(phenylsulfonyl)sulfone (BPS) – CAS 1677-46-9 (PC Co-flame retardant)

4. Anti-dripping Agent (PTFE) – CAS 9002-84-0

5. Sodium Perfluorobutanesulfonate – CAS 17202-41-4

6. Tetraethylammonium Perfluorobutanesulfonate – CAS 25628-08-4

7. Potassium Perfluoroethylcyclohexanesulfonate – CAS 67584-42-3

8. Magnesium Perfluorobutanesulfonate – CAS 68259-15-4

9. Dodecylbenzene Sulfonic Acid (DBSA) – CAS 27176-87-0

10. Silicone Flame Retardants