Agricultural Chemical Regulatory Science and Registration Consulting
About Calegent
Mike Leggett, Ph.D.
Xiao (Michael) Huang, Ph.D.
Xiao (Michael) Huang, Ph.D.
25+ years of experience in the Crop Protection Industry
- Leading Regulatory and Product Development Teams
- Science Policy Development and Communication
- Design and Implementation of Product Regulatory Strategy for new active ingredients and the review and label expansion of existing products
- Dossier Management
- Risk Assessment
- Study Design and Mon
25+ years of experience in the Crop Protection Industry
- Leading Regulatory and Product Development Teams
- Science Policy Development and Communication
- Design and Implementation of Product Regulatory Strategy for new active ingredients and the review and label expansion of existing products
- Dossier Management
- Risk Assessment
- Study Design and Monitoring
- Liaison with Regulators in US EPA, EU, Canada PMRA, COFEPRIS
Xiao (Michael) Huang, Ph.D.
Xiao (Michael) Huang, Ph.D.
Xiao (Michael) Huang, Ph.D.
30+ years of experience in the Crop Protection Industry across academia, consulting and industry
- Environmental Exposure Assessment Expert
- Corteva Agriscience Lauretate (Fellow)
- An expert in chemical safety assessment and has made substantial contribution in supporting of global registration of many agrochemicals, including DuPont’s diamide
30+ years of experience in the Crop Protection Industry across academia, consulting and industry
- Environmental Exposure Assessment Expert
- Corteva Agriscience Lauretate (Fellow)
- An expert in chemical safety assessment and has made substantial contribution in supporting of global registration of many agrochemicals, including DuPont’s diamide insecticides and sulfonyl urea herbicides.
- 12 years of consulting experiences in providing environmental fate modeling support to U.S. EPA Offices such as OPP/EFED
- 15 years as environmental exposure expert in DuPont Crop protection, FMC Agriscience, Dow Agriscience, and Corteva Agriscience.
- Led a team in preparing study reports/dossiers, addressed regulatory comments, and solved technical issues in support of registration of active substances in North America, Europe, Asia, and Latin America.
- Company representative with global trade associations and task forces
- industrial representative in European Food Safety Authority (EFSA).
- Internationally recognized expert making significant advancements in Regulatory Science particularly the science of non-extractable residues (NER) of pesticides and aged sorption.
Recent publications:
Huang, X.M.; Lynn, K.; Cryer S.; Wijntjes, C. (2024) Identifying bound compounds in non-extractable residues of pesticides in soil by 4-pool kinetic analysis. Science of the total environment. 2024, 955, 176814.
Huang, X.M.; Barnekow, D.; Krieger, M. (2026) Speciation of non-extractable residues of pesticides in sediments by 4-pool kinetic analysis. Science of the total environment. 2026, 1010, 181090.
Services We Offer
Field Development and Registration
Risk Evaluation, Study Management and Reporting
Risk Evaluation, Study Management and Reporting
Design, Management, Summarization and Reporting of Field Studies of Product Efficacy Crop Safety or Crop Residue to Support Product Development and Registration
Risk Evaluation, Study Management and Reporting
Risk Evaluation, Study Management and Reporting
Risk Evaluation, Study Management and Reporting
- Environmental fate modeling
- Ecological, Drinking water and dietary risk assessment to support pesticide registration
- Design and management of laboratory and field studies to support registration
Regulatory Support
Risk Evaluation, Study Management and Reporting
Regulatory Support
- Dossier management and data gap analyses
- Registration submissions and support including representation as Agent for foreign registrants in Canada
- Submissions to establish new MRLs Nationally or with Codex