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The program includes major 150th-anniversary elements with influential chemists and ACS presidents. “Program by the Numbers” highlights 10,370 accepted papers, 870 half-day sessions, and detailed scheduling across in-person and digital meeting dates. 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Chicago is known for history, food, and architecture. The famous Route 66 begins in front ofthe Art Institute of Chicago, the first self-sustaining nuclear chain reaction took place in 1942 at the University of Chicago, and what is  \nformerly known as the Sears Tower was the tallest building in the world from the early 1970s to 1998. This year, the American Chemical Society will continue celebrating its own historic milestone of its 150th anniversary year.  \nAttendees can be part of the action either in person in Chicago or online with special digital programming. The program will feature keynote speakers, social events and spaces for networking, and tailored career, industry, and student and postdoctoral researcher events. This year’s events will also include special 150th-year programming featuring influential chemists and ACS presidents.  \nPROGRAM BY THE NUMBERS  \nACS Fall 2026 will present original programming hosted (or co-hosted) by 31 ACS divisions and 10 ACS committees, including the president (PRES).  \n⎔ 10,370 accepted papers, including 5,255 in-person oral presentations and 956 digital oral presentations.⎔ 4,206 poster presentations, including 961 Sci-Mix presentations.  \n⎔ 870 half-day sessions, including 677 oral sessions (587 in-person, 90 digital), 169 in-person poster sessions, and 24 in-person Sci-Mix sessions.  \n⎔ The most concurrent technical sessions, 88.  \n⎔ In-person technical sessions are scheduled Monday, Aug. 24, through Thursday, Aug. 27. Digital Meeting programming will be offered on Sunday, Aug. 23.  \nAlert: The attendee list for ACS Fall 2026 is maintained solely by ACS and is proprietary to ACS. Distribution or other use of the list without express authorization by ACSis strictly prohibited. ACS does not share or sell contact information, in accordance with our privacy policy.  \nAugust 2026 | CEN .ACS .ORG | C&EN 73  \nGeneral meeting information  \nRegistration  \nRegistration is required for all attendees, including:  \n⎔ Attendees participating for one day ⎔ Attendees only giving an oral  \npresentation ⎔ Poster presenters  \n⎔ Exhibitors  \nNote: Pre-registration is required for all attendees who will be presenting their work in an oral or poster session during the meeting. Pre-registration for the meeting was June 15; if the presenting author did not register by the required deadline and make their presentation based on this abstract, the abstract was considered withdrawn and removed from the meeting program, technical programming archive, and CAS database.  \nPoints to remember  \n⎔ Sponsored speakers should contact their symposium organizer or division program chair to clarify the terms of their invitations and to determine who will complete the meeting registration.  \n⎔ Join ACS before you register and save up to $400 off the late/onsite registration rates. As an ACS member, you can book your housing at the same time that you register for the meeting.  \n⎔ Emerging Economies discount: ACS is offering special meeting registration discounts to members residing in countries with emerging economies. This initiative aims to expand access to the benefits of attending the ACS meeting, either in person or digitally, to the global scientific community.  \n⎔ Before registering for the meeting and booking travel arrangements, international attendees are encouraged to review the ACS International Attendee Resource web page to learn more about traveling to the US and securing a visa.  \n⎔ Registration Refund Program: This program is optional and works like travel insurance. You can protect yourself by opting in for coverage, which will provide a 100% refund of your  \n74 C&EN | CEN.ACS.ORG | August 2026  \nREGISTRATION CATEGORY  \nIN PERSON/ VIRTUAL  \nVIRTUAL ONLY  \nMEMBERS  \nFULL CONFERENCE  \nACS member or society affiliate  \nGraduate student  \nStudent or K–12 teacher (includes AACT discoun","cbCair7B1ds2NwDN","https://ap.wps.com/l/cbCair7B1ds2NwDN","pdf",11546882,12,"English","# General meeting information\n## Registration\n## Points to remember\n## Registration categories and fees\n## Registration venues and hours","[{\"question\":\"Where and how can attendees participate in ACS Fall 2026?\",\"answer\":\"ACS Fall 2026 is held in Chicago with options to attend in person or join online through special digital programming.\"},{\"question\":\"Is pre-registration required, and what happens if the deadline is missed?\",\"answer\":\"Pre-registration is required for attendees presenting in an oral or poster session. Registration for the meeting was due June 15; if the author did not meet the deadline and build the presentation from the required abstract, the abstract was withdrawn and removed from the meeting materials.\"},{\"question\":\"What are key registration rules and payment requirements on-site?\",\"answer\":\"Registration is required for all attendees. The meeting is cashless for onsite registration payments, accepting only credit cards; cash and checks are not accepted.\"}]","ACS Fall 2026 Meeting Program - Registration and Attendee Information | PDF",1789997604]