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Related Concept Videos

Effects of Chemicals: Overview01:27

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Drugs, encompassing various chemical compounds from natural sources, lab synthesis, or genetic engineering, elicit different biological responses in living organisms. Some of these responses are desirable or therapeutic, while others are undesirable. The primary goal of administering a drug is to achieve a therapeutic effect, that is, to address a specific disease or health condition. Any concurrent effects outside of this therapeutic outcome are considered undesirable. These undesirable...
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Chemical Properties of Matter01:28

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Drug Classes and Categories01:25

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Drugs can be classified according to their chemical composition or their intended therapeutic application. For instance, anti-infective agents that possess the ability to eliminate pathogens or suppress their growth and reproduction can be grouped based on the organisms they target or their chemical structure. Furthermore, drugs can be divided into prescription, nonprescription, or controlled substances. Prescription medications, such as antibiotics, require oversight from a licensed healthcare...
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Polymerization generates chiral centers along the entire backbone of a polymer chain. Accordingly, the stereochemistry of the substituent group has a significant effect on polymer properties. Polymers formed from monosubstituted alkene monomers feature chiral carbons at every alternate position in the polymer backbone. Relative to the predominant orientation of substituents at the adjacent chiral carbons, the polymer can exist in three different configurations: isotactic, syndiotactic, and...
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Related Experiment Video

Updated: Aug 14, 2025

Identifying Per- and Polyfluorinated Chemical Species with a Combined Targeted and Non-Targeted-Screening High-Resolution Mass Spectrometry Workflow
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Advancing the science on chemical classes.

Maricel V Maffini1, Swati D G Rayasam2, Daniel A Axelrad3

  • 1Independent Consultant, Frederick, MD, USA. drmvma@gmail.com.

Environmental Health : a Global Access Science Source
|January 12, 2023
PubMed
Summary
This summary is machine-generated.

Grouping chemicals into classes can significantly improve the efficiency of chemical risk assessment and management. A decision tree approach, considering factors like structural similarity and toxicity, offers a practical method for regulators.

Keywords:
Chemical classChemical groupingDecision-makingOrtho-phthalatesRegulationRisk assessmentToxic chemicals

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Area of Science:

  • Environmental Science
  • Toxicology
  • Regulatory Science

Background:

  • Chemical hazard identification and risk assessment are typically performed individually for each substance.
  • Grouping chemicals into categories offers an underutilized strategy for enhancing regulatory efficiency.

Purpose of the Study:

  • To review existing national and international chemical grouping approaches.
  • To define criteria for chemical grouping based on decision context and scientific properties.
  • To explore the utility of a decision tree framework for chemical classification.

Main Methods:

  • A comprehensive review of current chemical grouping methodologies.
  • Analysis of decision-making contexts (e.g., risk assessment, policy) and scientific considerations (e.g., physical-chemical properties).
  • Case study utilizing ortho-phthalates to identify and organize cross-agency frameworks.

Main Results:

  • Structural similarity is the predominant method for chemical grouping among regulatory bodies.
  • Toxicity to specific organs or biological functions is also employed in some grouping strategies.
  • A decision tree approach, incorporating inter-agency regulatory information, can enhance chemical risk management.

Conclusions:

  • Chemical class-based approaches can streamline the reduction of exposure to multiple hazardous substances, thereby lowering health risks.
  • A decision tree framework can aid in selecting chemicals for a class based on the specific regulatory context.
  • Implementing a decision tree approach can facilitate more efficient and coherent chemical risk management across agencies.