P-tert-octylphenol (CAS 140-66-9) Market Research Report 2025 '@aboutP-tert-octylphenol (4-t-Octylphenol, para-tert-Octylphenol, 4-tert-Octylphenol, etc.) refers to alkylphenolic compounds that derive as the major biodegradation products of nonionic surfactants. P-tert-octylphenol is a white solid with the molecular ...