ASTA Resources Tag: PPO Latest Popular Important ASTA Submits Petition for Expansion of PPO Tolerances to Additional Spices 10/1/2024 ASTA Proposal to EPA’s ChemSAC to Establish Tolerances for Propylene Oxide (PPO) on Turmeric, Ginger, Sesame, and Capsicum 11/30/2023 2023 Technical Presentation: Propylene Oxide Pasteurization 5/9/2023