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Guiding Principles of Responsible Chemistry


Safety, Security & Sustainability

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Implement a culture of safety, security, sustainability, and responsibility in the practice of chemistry.  

Overview

The practice of chemistry should be carried out with careful consideration for the health of people and the environment, particularly in light of the hazardous properties of chemicals, and to prevent illegal, harmful, or destructive uses of chemicals and the misuse of facilities where they are manufactured or used.  

Illustration by KCVS 

Chemical safety practices protect people and the environment from hazardous materials. Security measures protect chemicals from their intentional misuse by people. Chemical sustainability refers to the process of designing, using, and disposing of chemicals in ways that reduce risks to human health and the environment. The responsible practice of chemistry requires careful consideration of each of these concepts, along with a commitment to ethical standards and active community engagement. The chemistry community must address the safety, security, and sustainability of chemicals and chemical products over their full life cycle, from manufacture to use to disposal. 

Examples
Chemical Safety Gaps

Serious gaps in chemical safety cultures and protocols have been exposed by catastrophic chemical accidents over the past 50 years, revealing the need for increased safety protocols and improved management systems. Examples include: 

  • In 1974, 28 people were killed and 36 were injured in a chemical plant explosion in Flixborough, England. Failure in the piping released around 30 tons of cyclohexane vapor which ignited, releasing energy equal to 16 tons of TNT.1 Further investigation revealed that there was no onsite engineer with the proper qualifications to design mechanical processes or provide technical reviews of the current systems.1 This incident led to new safety legislation in the United Kingdom, including the Health and Safety at Work Act of 19742 and the Control of Major Accident Hazards Regulations in 1999.3 
  • In 1976, in Seveso, Italy, the accidental release of dioxin contaminated the area surrounding the city and led to the evacuation of thousands of people.4-5 This disaster was instrumental in the development of the Seveso Directive, which focused on preventing major industrial accidents involving hazardous substances across Europe.  
  • In 2016, in Atchison, Kansas, United States, a large cloud of toxic chlorine gas and other chemicals was released from the Midwest Grain Products of Indiana (MGPI) Processing plant after a chemical delivery truck mistakenly unloaded into the wrong tank. Sulfuric acid, the world’s most manufactured chemical, and sodium hypochlorite, the active ingredient in household bleach, were mixed, forming a large chlorine gas cloud over the region.6 Over 100 people sought medical attention, and thousands in the surrounding area were evacuated or asked to shelter in place. One leading cause of this accident was the failure of plant personnel to ensure the driver connected the truck to the proper tank.6 However, only MGPI employees or those who were familiar with the plant layout could distinguish between the tanks as neither the sulfuric acid tank nor the sodium hypochlorite tank were labelled. Additionally, the plant lacked automatic emergency systems, and the sulfuric acid had to be manually restricted from entering the sodium hypochlorite tank.6  
  • One of the deadliest chemical disasters in history occurred in 1984 in Bhopal, India, when a gas leak at a pesticide plant killed thousands of workers and civilians.7 Over 40 tons of methyl isocyanate was released, exposing the plant workers and the surrounding community to this toxic chemical. The company claimed that worker sabotage caused the tragedy. However, investigations and legal proceedings showed that safety protocols had been neglected as a cost-cutting measure. This incident prompted efforts to improve chemical safety practices and better educate workers and nearby residents about potential risks. The legacy of this incident is still evident today, demonstrating how closely chemical safety, security, and sustainability are interconnected, and why it is important to understand how to best address all of them.  

While this is not a comprehensive list of all chemical safety incidents that have occurred in the past half-century, each of these events increased public awareness of the safety risks that accompany the large-scale production of chemicals and led to widespread legislative action to develop stricter safety protocols. Despite improved regulations in many parts of the world, such incidents continue to occur today, highlighting the ongoing need to prioritize chemical safety.   

Importance of Laboratory Safety

Over the last few decades, a number of serious laboratory accidents have highlighted the need for rigorous safety protocols in academia as well as in industry. Examples include the following: 

  • In 1997, a highly respected chemist accidentally spilled a few drops of dimethyl mercury, a highly toxic chemical, on her glove during an experiment.8 The gloves she was wearing did not provide adequate protection and the dimethyl mercury was able to reach her skin. She died of mercury poisoning almost a year later, as the symptoms did not develop until five months after the spill.8 Proper personal protective equipment (PPE) and safety education could have prevented this tragedy. This accident initiated a rigorous assessment of glove permeability and further investigation into the safety data sheets for dimethyl mercury and other toxic substances.  
  • In 2008, a research assistant mistakenly exposed t-butyl lithium, a pyrophoric chemical, to air while using a plastic syringe to transfer the substance.9 The chemical exploded and the researcher died from severe burns a few weeks after the incident. Investigations following the incident revealed that the researcher was not following proper lab safety protocols or wearing appropriate PPE when conducting the experiment.9 This accident led to better assessment of chemical hazards and risks in the laboratory and an increase in safety training to reduce similar events in the future.  
  • In 2010, chemistry graduate students were conducting a synthesis using an explosive chemical.10 The students had scaled up the amount of reactant to prepare for further experiments, planning to keep it wet with a solvent to prevent detonation.10 However, when one student was breaking up clumps in the substance, a violent explosion occurred, causing him to lose three fingers and suffer severe eye damage. Injuries could have been minimized if the students had followed proper PPE requirements. Key factors in this incident were the students’ lack of experience in scaling reactions and insufficient laboratory supervision.  

The laboratory accidents described above highlight the need for a culture of safety in academic settings and for intentional safety training focused on risk assessment of the chemicals being used in an experiments. Accidents that cause serious harm to people and the environment can still occur within laboratories, even when using smaller amounts of chemicals than in industry. Chemical safety should be a priority in academia and other small-scale laboratory settings, as well as in industry.  

Chemical Security: OPCW Work and The Hague Ethical Guidelines

Chemical safety is only part of a chemist’s responsibility to ensure that chemistry is not used for harm. Chemists must also consider issues of chemical security, such as making sure that the toxic chemicals they can access are not misused by others.   

Organisation for the Prohibition of Chemical Weapons11

The Chemical Weapons Convention (CWC), implemented by the Organisation for the Prohibition of Chemical Weapons (OPCW),11 is an international nonproliferation treaty that was designed to rid the world of chemical weapons and prevent their future use. This agreement is currently the world’s most successful disarmament treaty, working to ensure that chemistry is solely being used for good.12 Recognizing the importance of reaching future practitioners of chemistry, OPCW created a series of lessons to educate the public and university students on chemical weapons, with emphasis on safety, security, and the responsible uses of chemistry.13 These lessons focus on chemical weapons, other chemical security issues, and how to protect both humans and the environment from the misuse of chemistry. 

OPCW Modules for Universities13

The Hague Ethical Guidelines were created by a group of international chemists, facilitated by OPCW, as an outline of the fundamental concepts related to the ethical practice of chemistry in the context of the CWC.14 These guidelines highlight safety, security, and sustainability as key components to the responsible use of chemistry and the protection of the health and well-being of people and the planet. The CWC and the Hague Ethical Guidelines are examples of important initiatives to integrate safety, security, and sustainability into the current chemistry culture. 

The Hague Ethical Guidelines 
Safety, Security, and Sustainability in Industry: The Responsible Care® Initiative

The Responsible Care initiative, founded in Canada in 1984, and now a global initiative, works to ensure that chemical manufacturing is safe, responsible, and sustainable.15 Its core principles focus on preventing harm to people and the environment, strengthening chemical safety and security, and promoting stewardship throughout the chemical lifecycle.15 Responsible Care is guided by a set of codes: operations, stewardship, and accountability, each outlining standards for ethical and responsible chemical management.15 Companies who subscribe to Responsible Care adopt these codes as they work to improve their production methods and chemical practices. By promoting transparency and accountability within the industrial field, the Responsible Care initiative seeks to ensure that safety, security, and sustainability of both people and the planet are maintained. 

Guiding Future Action

By applying systems thinking, chemists consider the entire lifecycle of a chemical substance, from its production to its disposal. This approach helps improve safety, enhance security, and advance sustainability by reducing hazards, minimizing risks, and limiting environmental impact. 

Systems Thinking in Chemistry for Sustainability: Toward 2030 and Beyond is an IUPAC project that provides resources, tools, and case studies to help educators implement systems-thinking approaches in teaching, and to help them connect chemistry education to sustainability.16-17 

IUPAC Sustainability and Systems Thinking in Chemistry Education resources 

One major outcome of the IUPAC initiative has been the release of the open-access Sustainability and Systems Thinking in Chemistry Education (SaSTICE) online resources to provide chemistry educators with the tools to implement systems thinking while teaching chemistry, so as to better equip students with the knowledge, reasoning, and practices they need to tackle multiple global challenges.18 

An ongoing follow-up IUPAC project, Systems Thinking, Sustainability and Chemical Industry, provides a channel for collaboration among chemical companies and IUPAC to facilitate dialogue, collaboration, and commitment to tackle sustainability challenges. The taskforce for this project is developing case studies on more sustainable polymers and conducting a systems evaluation of ammonia, an important inorganic material. This work will demonstrate how systems thinking can identify strategies for increasing the sustainability of ammonia and hydrogen as molecular energy carriers.  

The Stockholm Declaration on Chemistry for the Future

In May 2025, the Nobel Symposium on Chemistry for Sustainability, hosted by the Stockholm University Center for Circular and Sustainable Systems, gathered leading experts in green chemistry to discuss the main advances in the field. A product of those rich discussions was The Stockholm Declaration on Chemistry for the Future (www.stockholm-declaration.org), which calls for “creating new methods to make [chemicals] that are aligned with the goals of advancing human well-being while preserving the essential biosphere and geosphere that allows life to exist.” The declaration includes a call to action of all chemists to design chemicals and processes that are safe and sustainable by design. It also emphasizes the need for chemistry to generate open-access data and information relating to the safety and sustainability of chemicals, and to encourage policies that disincentivize polluting, toxic, and dangerous chemical practices. The declaration also calls for collaboration among scientists, industrial leaders, educators, students, and policy makers to generate solutions to global challenges using safe and sustainable chemistry practices.  

Questions to Guide Discussion 
  • What is the difference between chemical safety and chemical security? Why is this differentiation important?  
  • How can safety, security, and sustainability be applied and prioritized in your own life and/or work environment? 
  • Reflect on the historical developments in the field of chemistry—how have chemical safety, security, and sustainability progressed? 
  • In your opinion, what has been the most significant improvement in chemistry safety, security, and sustainability practices? 
  • How does sustainability relate to chemical safety and chemical security? 
  • Provide examples of how sustainability practices enhanced safety or security in your own work or in industry. What about when sustainability practices hindered safety or security? 
  • What are the current challenges in chemical safety, security, and sustainability? In your opinion, which of these challenges require the most attention? 
  • How can new technologies or practices address the current challenges in chemical safety, security, and sustainability? 
  • What is “systems thinking” in the context of chemical safety, security, and sustainability? 
  • How can systems thinking improve practices in chemical safety, security, and sustainability? 
References
  1. Center for Chemical Process Safety of the American Institute of Chemical Engineers. Building Process Safety Culture: Tools to Enhance Process Safety Performance; AIChE: New York, 2005. https://www.aiche.org/sites/default/files/docs/embedded-pdf/Flixborough-Case-History_0.pdf
  2. Health and Safety at Work etc. Act 1974. https://www.legislation.gov.uk/ukpga/1974/37/contents (accessed 2025-06-14). 
  3. The Control of Major Accident Hazards Regulations 1999. https://www.legislation.gov.uk/uksi/1999/743/contents/made (accessed 2025-06-14). 
  4. Eskenazi, B.; Warner, M.; Brambilla, P.; Signorini, S.; Ames, J.; Mocarelli, P. The Seveso Accident: A Look at 40 Years of Health Research and Beyond. Environ. Int. 2018, 121 (Pt 1), 71–84. https://doi.org/10.1016/j.envint.2018.08.051
  5. European Chemicals Agency (ECHA). Substance Information – 2,3,7,8-tetrachlorodibenzo[b,e][1,4]dioxin. https://echa.europa.eu/substance-information/-/substanceinfo/100.015.566 (accessed 2025-06-14). 
  6. U.S. Chemical Safety and Hazard Investigation Board (CSB). Mixed Connection, Toxic Result. https://www.csb.gov/videos/mixed-connection-toxic-result/ (accessed 2025-06-14). 
  7. U.S. Chemical Safety and Hazard Investigation Board (CSB). On 30th Anniversary of Fatal Chemical Release That Killed Thousands in Bhopal, India, CSB Safety Message Warns It Could Happen Again. https://www.csb.gov/on-30th-anniversary-of-fatal-chemical-release-that-killed-thousands-in-bhopal-india-csb-safety-message-warns-it-could-happen-again-/ (accessed 2025-06-14). 
  8. Lemonick, S. 25 Years After Karen Wetterhahn Died of Dimethylmercury Poisoning, Her Influence Persists. Chem. Eng. News, https://cen.acs.org/safety/lab-safety/25-years-Karen-Wetterhahn-died-dimethylmercury-poisoning/100/i21 (accessed 2025-06-14). 
  9. Kemsley, J. 10 Years After Sheri Sangji’s Death, Are Academic Labs Any Safer? Chem. Eng. News, https://cen.acs.org/safety/lab-safety/10-years-Sheri-Sangjis-death/97/i1 (accessed 2025-06-14). 
  10. U.S. Chemical Safety and Hazard Investigation Board (CSB). Experimenting with Danger. https://www.csb.gov/videos/experimenting-with-danger/ (accessed 2025-06-14). 
  11. Organisation for the Prohibition of Chemical Weapons (OPCW). https://www.opcw.org/node/2632 (accessed 2025-06-14). 
  12. Organisation for the Prohibition of Chemical Weapons (OPCW). Achieving Universality of the Convention. https://www.opcw.org/our-work/achieving-universality-convention (accessed 2025-06-14). 
  13. Organisation for the Prohibition of Chemical Weapons (OPCW). OPCW and Its Mission: Bringing the World Together to Tackle Chemical Weapons. https://learn.opcw.org/mod/h5pactivity/view.php?id=1707 (accessed 2025-06-14). 
  14. Organisation for the Prohibition of Chemical Weapons (OPCW). The Hague Ethical Guidelines. https://www.opcw.org/hague-ethical-guidelines (accessed 2025-06-14). 
  15. International Council of Chemical Associations (ICCA). Responsible Care®. https://icca-chem.org/focus/responsible-care/ (accessed 2025-06-14). 
  16. Mahaffy, P. G.; Elgersma, A. K. Systems Thinking, the Molecular Basis of Sustainability and the Planetary Boundaries Framework: Complementary Core Competencies for Chemistry Education. Curr. Opin. Green Sustain. Chem. 2022, 37, 100663. https://doi.org/10.1016/j.cogsc.2022.100663
  17. Talanquer, V.; Szozda, A. An Educational Framework for Teaching Chemistry Using a Systems Thinking Approach. J. Chem. Educ. 2024, 101 (5), 1785–1792. https://doi.org/10.1021/acs.jchemed.4c00216
  18. IUPAC. Sustainability and Systems Thinking in Chemistry Education. SaSTICE. https://sastice.com/ (accessed 2025-06-14).