Amodel A-4160HSL Solvay Advanced Polymers PPA  is a 60% glass reinforced, heat stabilized polyphthalamide (PPA) which exhibits high modulus at elevated temperatures,

PPA为无色透明黏稠状液体。易潮湿。能与水混溶并水解为正磷酸，不结晶。有腐蚀性。用在有机合成中用作化合物环化剂及酰化剂。也用作正磷酸的代用品及分析试剂。