
Gaseous chlorine is a yellow-greenish gas that, when inhaled, is extremely toxic and harmful to the body. It is a pulmonary irritant that burns conjunctiva, the throat, and the bronchial tree. In plain terms, it is a choking agent. When chlorine gas is inhaled, the respiratory tract is severely affected. The air sac in the lungs begins to secrete fluid, which causes a person to feel as if they are drowning. When used as a weapon, chlorine gas causes severe respiratory issues and, in extreme cases, death.
Recently, evidence has been brought forth in regards to Sudan’s military using chlorine gas as a weapon. The use of chlorine gas as a weapon goes against the Chemical Weapons Convention and is considered a war crime. Previously, at the end of 2024, a blog was written in relation to the civil war in Sudan by another blog writer. If you would like to read about the beginning of the war check out Delisha Valacheril’s blog post Civil War in Sudan: What is Happening and How to Help. This blog will address the Sudanese military’s use of chlorine gas amidst the humanitarian crisis and ongoing civil war in Sudan.
The Sudanese Military’s Use of Chlorine Gas:

On May 22, 2025, the U.S. Department of State released a press statement that determined that the Sudanese military had used chemical weapons in 2024 that were in violation of the Chemical and Biological Weapons Control and Warfare Elimination Act of 1991 (CBW Act). The statement neglected to detail which chemicals were used, and the Sudanese Armed Forces (SAF) denied any such use of chemicals.
Since the U.S. Department of State’s press statement in May 2025, new evidence of the Sudanese military’s using chemical weapons has emerged. International news channel France 24 observed two incidents that occurred in September 2024, where the Sudanese Army was attempting to recapture al-Jaili oil refinery, which was then under Rapid Support Forces (RSF) control. In France 24’s investigation, they discovered that the chlorine canisters found around the oil refinery could only be carried by aircraft that the Sudanese military has exclusive access to.
Along with that, one of the oil barrels was imported from India by a Sudanese company that also supplies the Sudanese Army. The pictures and videos containing evidence of chlorine gas being used can be viewed in France 24’s report, linked here. In the pictures yellow-green clouds and large canisters with the remnant of a bright yellow chemical can be seen.
From a legal lens, all nations that ratify a convention or treaty are legally obligated to follow those regulations and rules. Violations of the Chemical Weapons Convention are considered war crimes and are potentially punishable in the International Criminal Court (ICC). Sudan ratified the Chemical Weapons Convention in 1999, meaning that the state is legally obligated to adhere to the agreed-upon terms of the convention.
Utilizing chlorine gas as a weapon is a violation of the Chemical Weapons Convention. As such, the use of chemicals by Sudan’s military is considered a war crime and, should the individuals responsible be identified, they could be punished in the International Criminal Court (ICC). This violation also goes against international humanitarian law, which seeks to decrease the effects of armed conflict and protects non-combatants. The deliberate use of chlorine gas, which affected not only RSF, but also civilians working at the oil refinery, emphasizes the growing danger in Sudan.
The Ongoing War in Sudan and Humanitarian Crisis:

The ongoing war officially began April 15, 2023 when Sudanese Armed Forces (SAF) and RSF engaged in violent conflict, which both sides stated the other started. Prior to the war, tensions had been increasing between leadership of the SAF and RSF. Background on the conflict and leadership is available in the aforementioned blog post Civil War in Sudan: What is Happening and How to Help.
However, as far back as 2016, there have been reports of chemical weapons being used on people in Darfur, a remote area in Sudan. Amnesty International found evidence that these weapons had resulted in the injury and death of many Sudanese civilians. In September of 2016, Amnesty International reported that around 30 chemical attacks were used in remote areas within Darfur, Sudan. These attacks resulted in chemical injuries and painful deaths. The people most affected by these attacks were children. In interviews, Darfurian villagers talk about blistering skin and rashes amongst many other symptoms from chemical exposure.
The struggle of Sudan has been a largely silent affair, one that is often overlooked by the media and the rest of the world. The lack of coverage of this conflict happens in spite of the fact that Sudan is currently experiencing the world’s biggest humanitarian crisis since World War II. The fight for power between SAF and RSF has left many areas of Sudan completely destroyed. Families have been forced to flee their homes, crops have been decimated, and villages have been set ablaze.
Since the fighting began, an estimated 150,000 people have been killed, and another 14 million have been displaced. Due to the large influx of people fleeing the conflict, refugee camps in South Sudan, Ethiopia, and Chad have been filled past their capacity. Furthermore, because of the fighting between the Sudanese army and the RSF militia, close to 30 million people in Sudan need assistance in various forms, such as medical attention, food aid, housing, etc. On the border of Chad and Sudan, around 850,000 people are seeking refuge and aid.
Throughout the war, hospitals, schools, and homes have been targeted and destroyed. This is another violation of international humanitarian law, no matter which side targeted civilian infrastructure. With housing and hospitals continuing to be destroyed, food insecurity and malnutrition are steadily increasing.
Conclusion:
When chlorine gas is used, or any gaseous chemical for that matter, it does not discriminate in who is affected. It burns the lungs and restricts the breathing of anyone it touches: combatant, non-combatant, or children. The use of such weapons is in violation of the Chemical Weapons Convention and international humanitarian law. It is a war crime, and it is something that no person, least of all children, should experience.
The war in Sudan has been ongoing for over 2 years now. The people of Sudan continue to suffer, and the conflict shows little sign of ending soon. Moments like this underscore the urgent need for humanitarian aid and media attention.


























