Getting started

The data gap, stated first

On this page11

What this group is And a certification is a mark Our catalog does not record it Which means we cannot serve two of the four leaves Stated at the top rather than discovered at the bottom So why write the property at all And because two leaves we can serve The honest division This is a data gap, not a sourcing one Fixing it would be a catalog change References

We publish material and capacity. We do not publish the one attribute that defines this product.

What this group is

Four leaves: UN rated liquid, UN rated solid, overpack and absorbent. Two of them are named for a certification.

And a certification is a mark

UN specification packaging is identified by a code stamped on the container, applied by the manufacturer of a tested design type. The mark is how you know.

Our catalog does not record it

We hold material, capacity, neck finish, dimensions and case pack. There is no field for a UN mark, so nothing on our pages can tell you whether a container carries one.

Which means we cannot serve two of the four leaves

Not because the shelf is thin, though it is the smallest in the library at 76 containers, but because the defining attribute is absent from the data.

Stated at the top rather than discovered at the bottom

A buyer shipping a regulated material needs certainty, and a catalog that lets them infer certainty from a product page it cannot support would be doing harm.

So why write the property at all

Because the mark is readable, and knowing how to read it is useful whoever you buy from. Nine elements in a fixed order, each a statement about a test.

And because two leaves we can serve

Absorbent and overpack are ordinary containers used in a regulated context. The shelf has 30 tubs and pails and 11 jugs, which is a genuine offering for one of them.

The honest division

Learn the mark here, buy the marked packaging from a supplier who certifies it, and come back for the things around it that are not themselves specification packaging.

This is a data gap, not a sourcing one

Which is worth distinguishing. Some of what we stock may well carry a mark; we simply do not publish it and so cannot say.

Fixing it would be a catalog change

A field, populated from manufacturer documentation, per product. Until that exists this property is the honest statement of the position.

References

Our catalog records material, capacity, neck finish, dimensions and case pack. It does NOT record whether a container carries a UN specification mark, which is the attribute that defines the product two of this group's four leaves describe. Nothing here is offered as UN specification packaging and nothing here should be assumed to be.

49 CFR 178.503(a), marking of UN specification packagings. In sequence: the United Nations symbol "as illustrated in paragraph (e)(1)(i)", or the letters UN on embossed metal receptacles; the packaging identification code designating type, material and category, with the letters V or W where applicable; a letter identifying the performance standard; the specific gravity or mass tested for; the test pressure or the letter S; "The last two digits of the year of manufacture"; the authorizing country, for example USA; "The name and address or symbol of the manufacturer"; and for reusable drums and jerricans the material thickness in millimetres. The example markings at (e)(2) are given as images rather than text. law.cornell.edu

The Davis Pack Supply catalog, measured 19 October 2026. The hazmat shelf is 310 rows: 76 containers and 234 closures, the smallest container count of any property in this library. 500 mL to 18,927 mL with a median of 2,514; 65 containers over a quart, 34 over a gallon and 6 at five gallons. 60 HDPE, 14 PP, 2 LDPE, and no glass, PET or steel. 30 tubs and pails, 23 bottles, 12 jars, 11 jugs. 46 white, 23 natural, 4 black, 2 clear. Closures: 175 continuous thread, 12 child resistant, 11 round tubs, 10 dome lids, 10 tub and pail lids, 5 flip top, 3 liners and sealing discs, 3 spouted, 2 phenolic.

Written from 49 CFR 178.503 and from the catalog as it stood on 19 October 2026. No specimen UN mark appears here, because the regulation gives its examples as images rather than as text. Nothing in this catalog is offered as UN specification packaging: we do not record whether a container carries a mark, and the mark belongs to a tested design type and is applied by its manufacturer. Packing group determinations, shipping names and documentation are the shipper's.