Bisphenol S

Description

1. Product Overview
Bisphenol S (BPS) is a high-stability sulfone-based diol engineered as the premier alternative to Bisphenol A (BPA) for high-performance polymers and thermal paper coatings. Its primary industrial use is as a monomer in the synthesis of epoxy resins, polycarbonates, and as a color developer in heat-sensitive recording materials. The key value proposition lies in its superior thermal stability (up to 230°C) and hydrolysis resistance, combined with a regulatory-compliant profile for food-contact and consumer-sensitive applications. Strategically, BPS is critical for manufacturers future-proofing their supply chains against tightening global BPA restrictions without sacrificing mechanical or thermal performance.

2. Key Specifications & Technical Characteristics

• Chemical composition: 4,4′-Sulfonyldiphenol (C₁₂H₁₀O₄S); CAS 80-09-1

• Purity level: ≥ 99.5% (HPLC) / Premium Industrial Grade

• Physical form: White to off-white crystalline powder

• Particle size: D50 20–50 µm (consistent flow for dry blending)

• Melting point: 245–248°C

• Density (bulk): 0.55–0.65 g/cm³

• Moisture content: ≤ 0.2%

• Packaging options: 25 kg kraft/PE laminated bags; 500 kg FIBC (bulk bags); 20 kg fiber drums with inner HDPE liner

• Shelf life: 24 months in sealed, dry, ambient conditions (15–30°C)

3. Core Industrial Applications

• Thermal paper coatings (color developer): Primary industry – point-of-sale receipts, labels, ticketing. Outperforms BPA by eliminating endocrine-disruption concerns while maintaining equal or higher image stability (≥7 years under standard storage). Cost-per-ton comparable to premium BPA-free developers.

• High-heat epoxy resins: Aerospace, automotive electronics, and industrial adhesives. BPS-based epoxies exhibit 15% lower moisture uptake and 10% higher glass transition temperature (Tg) versus BPA epoxies, enabling reliable performance in humid, 150°C+ environments.

• Polycarbonate copolymers: Medical device housings, baby bottles, and reusable water containers. BPS provides drop-in processability (similar melt viscosity) with superior UV resistance and no detectable estrogenic activity under FDA/EU protocols.

• Polyether sulfone (PES) membranes: Water filtration and dialysis. BPS-derived PES shows higher chemical resistance to chlorine and caustic cleaning agents, extending membrane lifespan by 20–30% compared to alternative sulfone monomers.

4. Competitive Advantages

• Quality consistency: Batch-to-batch purity variation < 0.1% (validated by SGS/TÜV-certified HPLC), with full traceability from precursor to final crystal.

• Supply reliability: Dual-sourced manufacturing (Asia-Pacific and Europe) with 5,000 MT annual dedicated capacity; safety stock maintained at ≥3 months of forecast demand.

• Logistics capability: Global warehousing in Rotterdam, Houston, and Shanghai; average lead time 14 days for container shipments; expedited airfreight available for urgent R&D or trial quantities.

• Price competitiveness: Volume-tiered pricing 5–8% below European and North American specialty producers, without minimum annual contracts.

• Sustainability & compliance: REACH, RoHS, and FDA 21 CFR 175.300 compliant; produced with 40% renewable energy; non-fossil-derived solvent recovery rate >95%. No SVHC (Substance of Very High Concern) listing.

• Technical support: Free certificate of analysis (CoA) per lot; material safety data sheet (MSDS) in 12 languages; application lab support for formulation optimization.

5. Commercial & Supply Information

• Minimum Order Quantity (MOQ): 500 kg (20 × 25 kg bags or 1 FIBC)

• BULK 20MT Loading Capacity: 20 metric tons (exactly) per standard 20-ft dry container – palletized (20 EUR/ISO pallets, 1,000 kg net each)

• Maximum per 40-ft HC container: 26 MT (using FIBCs with optimized stacking)

• Incoterms supported: EXW (Shanghai / Rotterdam), FOB, CIF (any major global port)

• Payment terms: LC at sight (≥20 MT), 30% T/T deposit + balance against B/L (MOQ–19.9 MT)