Many labs use compressed gases, and often we use pressure regulators to step down the 2000-3000 psi in the cylinder to the use pressure. If the regulator can produce more than about 30 psi outlet, your plastic tubing might be in danger of rupture. Read more about how to fix this without buying a new $500 regulator in How to prevent plastic tubing rupture.
Many people think that safety improvements for an experiment always cost extra money. This is not true–many times, appropriate improvements avoid cost while making the research inherently safer. Read about one such case that saved the Electrical and Computer Engineering department over $10,000 (and lots of class time) in Cost reduction ECE laser teaching lab.
There are many different types of protective eyewear available, and each one is designed to protect against a different hazard. Having the wrong type of safety eyewear can be worse than not wearing eye protection at all. Learn about the basic types in Choosing eye protection.
This Hopkins Safety Note is the start of a series on eye protection, so look for future notes covering the different types in detail.
Recently, a researcher in MD Hall purchased two inexpensive “pointing lasers” over the Internet to use in an experiment. Fortunately, before starting work with the lasers, the researcher consulted with the Laser Safety Advocate—who determined that the lasers were actually dangerous 1-watt infrared Class 4 lasers, and a serious threat to anyone in the room if they were used without controls. With a little 3-D printer magic, the LSA re-engineered the experimental apparatus so that the system was a safer Class 1, not even needing protective laser goggles. Read about the case in Class 4 pointing lasers.
In the lab, we often collaborate with others in the lab or with outside researchers. It is essential that lab protocols be communicated consistently and in language everyone understands. Learn about a close call that occurred when a JHU researcher misunderstood an outside collaborator’s protocol in CCall miscommunication MD.
Many people don’t know that handheld lasers sold as “laser pointers” may be grossly overpowered and very dangerous both to the user and to the audience. Learn about laser pointer hazards and why Homewood allows only Class 2 laser pointers in Using laser pointers.
A researcher finished flame-sealing an ampoule in a chemical fume hood, turning off the torch used and setting it down. While the researcher was storing the ampoule, the hot torch tip ignited a number of lab wipes and rubber stoppers that had been left in the hood, and the cotton insulation on a nearby solvent still containing 1-2L of highly flammable tetrahydrofuran (THF) also ignited.
Learn more about this incident, including lessons learned at Incident Fire NCB Jun2015
During a lab move, a chemical container was moved to the wrong lab, where it remained for years. While the container read “Ethyl Alcohol” on the side, it actually contained chemical waste. Several years later, a student filled spray bottles with the contents of the container, and the lab used them for about a week to sanitize biological safety cabinets, equipment, hands, etc. Several researchers were exposed to the contents. Fortunately, analysis showed that the contents were water and a common solvent, and exposures were minimal.
Find out Lessons Learned and other information about this incident at Incident chemical exposure Croft Oct2014.
While performing experiments in a large water tank, a researcher placed an incandescent spotlight in front of a 2-inch thick Plexiglas observation window. During the experiments, the lamp slipped and came to rest against the window surface. The window melted one-third of the way through, compromising its mechanical integrity.
Learn more about this incident in Incident tank damage Krieger May2014.
Chemical fume hoods help prevent exposure to volatile hazardous chemicals in the lab. The hood works best, though, when it is empty. Everything in the hood disturbs the airflow, so keep extra equipment, chemicals, and other materials to a minimum.
Learn more about using fume hoods for storage in Fume hoods are not storage cabinets.