The size limit

The chemistry exception

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What it permits Condition one, the chemistry Read both halves of that Condition two, the quantity your process needs Or an analytical standard And a separate export route Why this is the most useful paragraph in the property Both conditions, not either Document which one applies And the approval question does not go away References

The regulation has a route back to a gallon, and it turns on exactly what this catalog is about.

What it permits

Glass or plastic containers of not more than one gallon for a Category 1 or 2 flammable liquid, which is up from a pint and a quart in Table H-12.

Condition one, the chemistry

That the liquid "either would be rendered unfit for its intended use by contact with metal or would excessively corrode a metal container so as to create a leakage hazard".

Read both halves of that

Either the metal ruins the liquid, or the liquid ruins the metal. The first covers a reagent or a finish contaminated by metal ions; the second covers an acid or a halogenated solvent attacking the can.

Condition two, the quantity your process needs

More than one pint of a Category 1 liquid, or more than one quart of a Category 2 liquid, of a single assay lot at one time. The exception is for a process that genuinely cannot work within the table.

Or an analytical standard

Where maintaining a standard liquid of a quality not met by available standard liquids needs a quantity exceeding one sixteenth of the capacity the table allows for that category. A laboratory provision rather than a shop one.

And a separate export route

The paragraph also permits such containers where they "are intended for direct export outside the United States", which has nothing to do with chemistry and sits in the same place.

Why this is the most useful paragraph in the property

Because the reason to choose glass over metal is the same reason the regulation allows it. A liquid that cannot be stored in metal is a liquid this shelf can serve to a gallon.

Both conditions, not either

The chemistry and the process quantity. Needing a gallon is not enough and the liquid attacking metal is not enough; the exception asks for the two together.

Document which one applies

Not for us, for the inspector. The exception is a determination about your liquid and your process, and the file is the only evidence it was made.

And the approval question does not go away

(d)(2)(i) still says only approved containers shall be used. The exception raises a capacity ceiling; it does not tell you that a particular bottle is an approved container.

References

29 CFR 1910.106(d)(2)(iii). Glass or plastic containers of not more than 1 gallon capacity may be used for a Category 1 or 2 flammable liquid where "such liquid either would be rendered unfit for its intended use by contact with metal or would excessively corrode a metal container so as to create a leakage hazard" AND the user's process either requires more than 1 pint of a Category 1 liquid or more than 1 quart of a Category 2 liquid of a single assay lot at one time, or requires maintaining an analytical standard liquid of a quality not met by available standard liquids in a quantity exceeding one sixteenth of the capacity Table H-12 allows for that category. The paragraph also permits such containers where they "are intended for direct export outside the United States". law.cornell.edu

29 CFR 1910.106(d)(2), Table H-12, maximum allowable size of containers and portable tanks for flammable liquids. Glass or approved plastic: 1 pt for Category 1, 1 qt for Category 2, 1 gal for Categories 3 and 4. Metal other than DOT drums: 1 gal for Category 1, 5 gal for Categories 2 through 4. Safety cans: 2 gal for Category 1, 5 gal thereafter. Metal drums to DOT specification: 60 gal. Approved portable tanks: 660 gal. Paragraph (d)(2)(i) adds that "only approved containers and portable tanks shall be used" and that metal containers meeting the requirements of 49 CFR chapter I "shall be deemed to be acceptable". osha.gov

The Davis Pack Supply catalog, measured 18 October 2026. The shop consumables shelf is 1,389 rows: 750 containers and 639 closures. 10 mL to 9,464 mL with a median of 120; 85 containers over a pint, 23 over a quart, 3 over a gallon and none over five gallons. 390 PET, 156 HDPE, 127 glass, 76 PP and 1 LDPE, and no metal containers or safety cans. Of the 127 glass containers, 6 are over a pint. 510 bottles, 219 jars, 16 tubs and pails, 4 jugs. 134 amber or dark amber. Closures: 373 continuous thread, 43 dropper assemblies, 39 child resistant, 36 disc top, 27 dome lids, 26 spouted, 19 flip top, 19 lug and twist, 14 phenolic, 7 buttress.

Written from 29 CFR 1910.106(d)(2) and Table H-12, 29 CFR 1910.1200(f) and Appendix B Table B.6.1, and from the catalog as it stood on 18 October 2026. Nothing here establishes that a container is an approved container for flammable liquid storage, which is a word the regulation uses and our data does not support. Fire codes, state plans and insurers sit on top of all of this.