We Thank You! 
This year our campus certified almost 800 chemical inventories as accurate!  

Thank you to everyone who participated in the annual chemical inventory certification process, which helped UC Davis report its chemicals to the regulators in a timely manner.

While the majority of users certify their inventory in early January, chemical certification can be done at any point of the year, between now and Jan.15, 2023.
ChemTag Support for Streamlined Certification
Safety Services' ChemTag Program can help make inventory reconciliation easier for labs. Reach out for more information, and to get RFID barcodes and scanners at no cost. Please email    
Standard Operating Procedures: Updates and Info 
The Chemical and Laboratory Safety Committee recently approved a Hazardous Drug Standard Operating Procedure (SOP) which can be found on the Safety Services website.

This SOP is recommended for all researchers who use any of the Hazardous Drugs listed on the NIOSH list of major hazardous drugs.

Starting February 2023, this SOP will be required for any labs that use
  • Chemotherapeutic drugs (as identified by the NIOSH list and denoted in Appendix II in the SOP)
  • Drugs classified with a Potency/Toxicity Category 3 or higher (as identified in Appendix II the SOP)
To reflect the addition of this new SOP, the SOP Guidance Document has been updated. This update also includes additional information regarding identifying Potentially Explosive Compounds, as well as Flammable and Combustible Liquids.  

As a reminder, SOPs need to be reviewed to ensure their content is accurate at a minimum every three years.

Read more about what to do to ensure your lab's SOPs remain current.
Chemical Spill Response Guide 
Chemical Spill Response
EH&S released a brochure called “Chemical Spill Response”. This brochure mirrors SafetyNet 13 and is meant to be stored with your lab's spill kit. If you’re interested in receiving a brochure for your spill kit email

Read more about a chemical spill “gone right” thanks to the proper use of secondary containment. Additional information on appropriate secondary containment can be found in Beyond the Bench Issue 15.
Compressed Gas Reverse Threaded Valve 
Description: A campus user was performing their annual inventory of gas cylinders and found that one of the Nitrogen gas cylinders appeared to have a reverse threaded valve (left-handed threading), as opposed to the typical right-handed threading. The user was unable to attach a Nitrogen regulator to the cylinder. The user did not force a regulator onto the cylinder but rather returned the cylinder to the vendor as defective for a replacement.  

Cylinder Threading: The size and direction of valve threading on gas cylinders is a safety mechanism designed to warn the user that the gas is hazardous and must be handled properly. Specifically, left-handed threading on a cylinder indicates that it contains a toxic, corrosive, or flammable gas (pure or in mixture). 

Cylinder Labeling: Labels are applied to compressed gas and cryogenic liquid containers to identify the container contents and to warn of principal physical and health hazards associated with the container and its contents. The shoulder label indicates the product’s name and identification number for shipping purposes in accordance with Department of Transportation (DOT) regulations. If, in a mixture, the hazardous component is below the threshold at which it poses a risk, that hazard is not assigned to the mixture. This often means the compressed gas hazard of the inert carrier gas is the primary hazard posed by a gas mixture. To accurately determine what is contained in a cylinder users must consult the packing slip attached to the gas cylinder.

Discussion: In this case, the shoulder label indicated that the gas cylinder contained Nitrogen but the reverse threaded valve indicated differently. The direction and threading of cylinder valves is standardized by the Compressed Gas Association (CGA) for specific gases. The cylinder was most likely filled with a specialty gas mixture: while it was labeled appropriately for DOT shipping, the corresponding packing slip that indicated all constituents was likely misplaced while the cylinder was in storage. Providing the CGA number for the valve and the serial number for the cylinder to the vendor will allow them to determine what it was last filled with. 

Safety Spot Award: The campus users who identified this issue were awarded Safety Spot Awards. These awards recognize our campus partners for identifying and addressing potential safety hazards. In this case, their ability to recognize the discrepancy between the shoulder label and the valve threading allowed for a cylinder that was not clearly labeled to be returned to the vendor instead of put into use, which could have resulted in an incident.
Solvent Still SafetyNet Updates 
Solvent Still SafetyNet Updates
SafetyNet 128 (Solvent Stills) now outlines a limit on the quantity (250mL) and frequency of solvent distillations that are performed without the use of a Solvent Purification System (see SafetyNet 518).  Responsible parties are still able to create small amounts of dry solvent with the proper training but are encouraged to look into alternative methods of obtaining dry solvent (e.g., purchase, solvent purification systems). SafetyNet 518 was also adjusted to include the same quantity and frequency limits as SafetyNet 128. Questions can be directed to
Pesticide SafetyNet Updates 
SafetyNet 38 (Guidelines for Pesticide Retention and Disposal), SafetyNet 49 (Pesticide Storage) and SafetyNet 85 (Antimicrobials are Pesticides) all underwent routine updates, with minor changes.

SafetyNet 49 had the most substantial changes, which included:  
  • Sentences relating to disposal or transport were deleted as they are outside of the storage topic 
  • Added details to address rusted/damaged pesticide containers
Meet Leonel Edwards 
UC Davis is excited to welcome Leonel Edwards as a new Industrial/General Safety Specialist! Leonel joins us from the world of risk management consulting and is passionate about keeping people safe. 
He's looking forward to using his experience and knowledge to help UC Davis in its mission to constantly be improving the Industrial/General Safety Program. "As an employee, I will not only have the opportunity to impact and serve a vast community, but also work with some of the brightest minds in the world."

Read more about Leonel ➔
Vacuum System Explosions 
Two recent reports of vacuum systems exploding at other campuses are detailed below, with more information on the Safety Services Lesson Learned page. Both types of systems are in wide use on the UC Davis campus.
Explosion of a high vacuum line caused by inadvertent condensation of liquid oxygen in the vacuum trap.
>>  Read more
Explosion inside a vacuum pump cabinet due to a high concentration of flammable vapor expelled from the pump exhaust.
>>  Read more
UC Epinephrine Auto-Injector Program renewed 
The UC Epinephrine Auto-Injector Training Program created by UC Field Safety Center of Excellence, has been renewed by the California Emergency Medical Services Authority for another five years.

This training allows individuals to obtain a state certification and carry an Epi-Pen to assist another person in case of a serious allergic reaction. Contact Heather Spaulding to learn more or schedule a training.
Centrally-Funded PPE Program Reinstated 
The Centrally Funded PPE program makes limited quantities of face coverings, disinfectants, sanitizers and other Personal Protective Equipment (PPE) available at NO COST to departments. Please note: This program does not apply to UC Davis Health clinical settings.

For more details on how to initiate a PPE request visit the Supply Chain Management website today. Questions should be directed to
Upcoming Trainings
Preparing for Your Laboratory Safety Review

For lab managers, safety delegates, grad students and PIs. This training will help you strengthen your lab safety culture and prepare for your annual lab review. Taught by the Lab Safety Professional Team.

Wednesday, April 13
9  - 11:30 a.m.
Register on the LMS
Online Lab Safety Tools Seminar

This interactive class will teach you how to use the UC Online Lab Safety Tools: Laboratory Hazard Assessment Tool (LHAT), Chemicals, Inspect, WASTe and Profile. 

Wednesday, April 20
9 - 11:30 a.m.
Register on the LMS
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