I was hoping you could help me with a fly food query?
We currently make up an Acid Mix in a fume hood as follows:
propionic acid 412ml
phosphoric acid 42ml
In the lab we then add 92ml Acid Mix (and 175ml 10% Tegosept) to 10L fly food at up to 80 degrees Celsius and spend 30-45mins dispensing the food into vials.
We have recently found out that these acids are a safety hazard and are wondering what other labs do re: the safety aspect of pouring fly food? At these low concentrations are these acids considered safe in normal lab conditions? We pour 10L four times a week so this issue is important to those involved in making it. The MSDS was not helpful regarding lower concentrations and higher temperatures.
I hope you can help us out.
Thanks in advance,
Media and Lab Services
Peter MacCallum Cancer Centre