Bisphenol A Bis(diphenyl phosphate) (BDP) is a high-performance organophosphorus flame retardant and hydrolysis stabilizer. It enhances thermal stability and moisture resistance in engineering plastics such as polycarbonate and polyester.
| Parameter | Value | Test Method |
| Appearance | White powder | Visual inspection |
| Phosphorus Content (%) | 8.5 – 9.5 | ICP-OES |
| Melting Point (°C) | 220 – 230 | DSC |
| Decomposition Temp (°C) | >320 | TGA |
| Moisture Content (%) | <0.2 | Karl Fischer titration |
| Solubility | Insoluble in water; soluble in organic solvents | — |
Q1: Is BDP suitable for food-contact use?
A1: No, mainly for industrial polymers and electronics.
Q2: How does BDP improve hydrolysis resistance?
A2: Neutralizes acids and promotes protective char formation.
Q3: Can BDP be combined with other flame retardants?
A3: Yes, it synergizes well with phosphorus and nitrogen types.
Q4: How to store BDP?
A4: In cool, dry, airtight containers away from acids.
Q5: Does BDP affect polymer transparency?
A5: Minimal impact, preserves clarity in transparent polymers.
