Dibasic Lead Phthalate in Powder Form works as a heat stabilizer, particularly at high temperatures. Dibasic Lead Phthalate is also effective as a light stabilizer. Dibasic Lead Phthalate is available in soft creamy powder form. Dibasic Lead Phthalate in Powder Form offers long-term protection on phthalate plasticized PVC compound which is to be subjected to ageing at elevated temperatures, due to its low reactivity with plasticisers, particularly the polyester type.