Harold Freeman

Bio

Prof. Freeman is a native North Carolinian, who worked as an organic chemist for 9.5 years at Burroughs-Wellcome Company and then joined N.C. State as Associate Professor of textile chemistry in 1982.  Following 35 years of teaching, research, and administration, he retired from his full-time appointment in the Wilson College of Textiles.

Area(s) of Expertise

Dye Design and Synthesis
Textile and Color Chemistry

Publications

• Lignocellulose‐based Stryphnodendron adstringens bark as a natural dye source for textiles: Extraction and dyeing studies , Coloration Technology (2025)
• Natural indigo toxicity for aquatic and terrestrial organisms , Ecotoxicology and Environmental Safety (2024)
• The natural anthraquinone dye emodin: Eco/genotoxicological characterization for aquatic organisms , Food and Chemical Toxicology (2024)
• Acryloyl esters of emodin for waterless dyeing and toxicological studies , Coloration Technology (2023)
• Evaluation of the Toxicological and Color Properties of Anionic Hydrophobic Monoazo Dyes for Sustainable Human Hair Coloration , ACS Sustainable Chemistry & Engineering (2022)
• Pomegranate peel extract and zinc oxide as a source of natural dye and functional material for textile fibers aiming for photoprotective properties , Materials Chemistry and Physics (2022)
• S-32-01 Mutagenicity of dyes: a call to fill the knowledge gaps and improve our predictive ability , Toxicology Letters (2022)
• Waterless Dyeing and In Vitro Toxicological Properties of Biocolorants from Cortinarius sanguineus , Journal of Fungi (2022)
• Copaifera langsdorffii Desf. bark extract: optimisation of dyeing conditions to wool and colour fastness properties , Natural Product Research (2021)
• A fungal‐based anthraquinone emodin for polylactide and polyethylene terephthalate in supercritical carbon dioxide (SC‐CO₂) dyeing , Color Research & Application (2021)

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