So my interpretation of that rule is that you can store in glass up to 1 gallon (I don't fully understand 4 L, since that's a little over, but I guess that works) if your process dictates that you can't use metal or that you will use more than 1 qt at a single time. So I would assume that something like HPLC grade ethanol could be in a 4L glass bottle due to impurities that may happen when placed in a metal can. There are probably other situation where you could make that argument.

I don't know if a plastic carboy can be considered as a safety can - since everything I buy come in 5 gallon plastic containers with spigots (all of my acetone, ethyl acetate, ethanol, methanol come that way). I'd guess that about 10 years ago most vendors switched from sending 5 gallon metal pails to 5 gallon plastic pails for most of my organic solvents (except halogenated things, hexane, acetonitrile, etc-). So I don't know exactly what allowed them to do that, but I feel that, in the solvents shipped that way, storage in plastic containers is acceptable.

But that rule does say that you can store category 2 things in 1 qt glass, 5 gallon metal pails, 5 gallon safety cans, 60 gallon metal drums, or 660 gallon portable tanks.

Good luck

Dave

> On Nov 10, 2017, at 9:59 AM, Sandoval, Mariah W <mwoodroof**At_Symbol_Here**TULANE.EDU> wrote:
>
> A common question our EHS department receives from professors is what size containers they can use to store flammable liquids in the lab, ethanol being the primary one. According to OSHA 29 CFR 1910.106(d)(2)(iii), the size of a glass container for a Category 2 flammable liquid is 1 qt. How then can laboratory researchers order and store 4 L glass bottles of ethanol from chemical suppliers? Is there a loophole I am missing? Are research labs allowed to store flammable liquids in larger size containers (say a 2 gallon carboy) if they use it on a day-to-day basis?
>
> Best,
> Mariah Woodroof, PhD
>
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