Announcements

Spring 2026

  • Chem 51LC - If you are not able to enroll in this course, please complete the Chem 51LC Enrollment Request form (UCINetID login required). Note: This form will be used to monitor enrollment requests and communicate if new lab sections are created; respondents who meet the initial major restrictions will be notified and potentially enrolled. Students who complete this form will be given priority if possible. More spaces may open starting March 27 once Winter grades are posted.

Winter 2026

  • Chem 51LB - If you are not able to enroll in this course, please complete the Chem 51LB Enrollment Request form (UCINetID login required). More spaces may open starting December 22 once Fall grades are posted. 

Fall 2025

  • Major restrictions (9/18/25) - The major restrictions for 51A will not be lifted on Thursday, September 18 at noon. In order to accommodate students in these majors, we need to extend the restriction until a later date, which will be determined soon. 
  • Chem 1A (updated 9/4/25) - The NewOnly restriction has been lifted. Major restriction was lifted on Thursday, September 18 at 3pm.
  • Chem 1LD (updated 8/7/25) - More lab sections have been created. Major restriction was lifted on Thursday, September 18 at 3pm.
  • Chem M3LC (updated 7/31/25) - The NewOnly restriction has been lifted.
  • Chem 5 (updated 7/31/25) - The NewOnly restriction have been lifted and we are assigned to a larger classroom so spaces are now open. 
  • Chem 51A (updated 8/15/25) - The NewOnly restriction has been lifted.
  • Chem 51A (updated 9/4/25) - The Tu/Th lecture capacity has increased capacity due approval of a larger classroom.
  • Chem 51A (updated 9/23/25) - The major restrictions and the repeat restriction will both be removed on Monday, September 29 (Week 1) at 9:00am. 
  • Chem M52LA (updated 7/31/25) - The NewOnly restriction has been lifted.
  • Chem M52LA (updated 9/4/25) - An additional lab section has been created.
  • Chem 107 (updated 7/31/25) - The NewOnly restriction has been lifted.
  • Chem 132A (updated 7/31/25) - The NewOnly restriction has been lifted.


Enrollment Information

Prerequisites / Co-requisites:

Please note that you must have passed or currently enrolled in the prerequisite or co-requisite. If you don't meet the prerequisites for a chemistry course, you will be dropped from the course by the Chemistry Department. If you satisfied your prerequisites at another institution, please email chemistry@uci.edu with your UCI NetID and any appropriate transcripts.  

The following rules apply:

  • Chem 1C / 1LC - Students must first enroll in Chem 1C before they can enroll in Chem 1LC
  • Chem 1LD  /Chem 51A - Students must first enroll in Chem 1LD before they can enroll in Chem 51A
  • Chem 51B / Chem 51LB - Students must first enroll in Chem 51B before they can enroll in Chem 51LB
  • Chem 51C / Chem 51LC - Students must first enroll in Chem 51C before they can enroll in Chem 51LC

Courses with Multiple Components:

Many Chemistry classes require concurrent enrollment in a Lecture, Discussion and/or Laboratory. Please check the schedule of classes and your class schedule to ensure you are enrolled in all parts of a course. If you are not enrolled in all parts of a course you will be dropped from the class or receive a NR for the portion of the course you are enrolled in.

Major restrictions:

Many Chemistry courses are initially restricted to the following majors: Biology, Chemistry, Engineering, Nursing Science, Pharmaceutical Sciences, Physical Science, Public Health, and Undecided/Undeclared. Major restrictions will be lifted on the following dates: 

  • Fall 2025: Thursday, September 18 by 12:00pm
  • Winter 2026: Thursday, December 18, by 12:00pm.
  • Spring 2026: Thursday, March 19, by 12:00pm.

The following Chemistry classes are initially restricted to Chemistry majors: 1A, 1X, 1LD, M2A, M2LA, 51A, M52LA, 132A ,152.

Repeat Students:

Students interested in repeating a Chemistry class will be restricted from enrolling. Repeat restrictions will be lifted on the following dates: 

  • Fall 2025: Tuesday, September 23 by 12:00pm
  • Winter 2026: Monday, January 5, by 12:00pm
  • Spring 2026: Monday, March 30, by 12:00pm

No authorization is required if you need to retake one component of a course. WebReg recognizes when you have satisfied the co-requisite if the passing grade is on your UCI transcript. For example, if you took Chem 1C/1LC in spring at UCI and did not pass Chem 1C and passed Chem 1LC. Once the repeat restriction is lifted, you are able to enroll in Chem 1C (without Chem 1LC) in Fall. 

Please note repeat policies are different for Summer Session, please see Summer Session Policies for details.

Add/Drop/Change:  

The deadline to add/drop/change Chemistry lab courses is Week 1 by 5:00PM. Please note this is earlier than the School of Physical Sciences deadline. The deadline to add/drop non-lab Chemistry courses is the end of Week 2 by 5:00PM. 

Chemistry Lab Policies

  • Attendance for week 1 is mandatory.
  • Students will not be able to add or drop a Chemistry laboratory after week 1. Please note this deadline is earlier than the School of Physical Sciences week 2 deadline.
  • Chemistry laboratory fees are non-refundable. If you are enrolled in a Chemistry Laboratory after week 1 you will be charged a lab fee and are responsible for paying the fee. 
  • Directions on how to purchase lab supplies can be found on the Required Personal Protective Equipment (PPE) for Undergraduate Chemistry Labs flyer. Please refer to the course syllabus for specific PPE requirements.

The following classes have a laboratory fee:

  • Chem 1LC-LD: $50 per student
  • Chem 51LB-LC-LD: $75 per student

Pregnancy in Chemistry Labs:

UC Irvine does not discriminate against any student on the basis of pregnancy or pregnancy-related conditions. Absences due to medical conditions relating to pregnancy will be excused for as long as deemed medically necessary by a student’s doctor and students will be given the opportunity to make up missed work. Students needing accommodations can seek assistance from the Disabilities Services Center at dsc@uci.edu or (949) 824-7494 or from the Title IX Office (the Office of Equal Opportunity and Diversity) at oeod@uci.edu or (949) 824-5594.  

The Department of Chemistry and the Department of Environmental Health & Safety Risk Services ensure that each student’s exposure to hazardous chemicals falls within acceptable limits as determined by OSHA and Cal/OSHA.   However, if you are pregnant, there may be additional risks to consider and so we strongly encourage you to consult with your physician and the Disabilities Services Center at dsc@uci.edu or (949) 824-7494 before undertaking work in the laboratory.