"when in actual contact with the substance contained therein."
The sentence
"The special packaging must continue to function with the effectiveness specifications set forth in paragraph (b) of this section when in actual contact with the substance contained therein."
Which is the sentence that matters to a packaging catalog
It is not enough for a closure to pass a test. It has to keep passing while full of the product.
And an essential oil is a solvent
Which attacks many plastics, swells some, and crazes others. A child-resistant mechanism relies on a specific fit and a specific stiffness.
So a mechanism can degrade into compliance failure
A closure that is slightly swollen or slightly softened may still seal and no longer resist a child in the way it was tested to.
The section also addresses repeated use
It requires the packaging to remain effective for the number of openings and closings customary for its size and contents. An essential oil bottle is opened often.
Which combines badly with a small container
Capacity here runs 5 to 120 mL with a median of 30. A 30 mL bottle used drop by drop is opened a great many times over its life.
Our material data does not reach this
We publish a five-point Chemical Resistance rating per material class, which the compounding property sets out. It is a screen and not a contact-over-time finding.
Glass removes the wall question and not the closure one
95 of 140 containers are glass, so the body is inert. The closure is plastic in almost every case and the closure is what has to resist.
14 phenolic closures are the traditional answer
A resistant cap for an aggressive liquid, and 14 of 358 is a small count for a shelf whose whole subject is solvents.
And none of the 358 is child resistant
So the in-actual-contact question does not arise here for want of anything to ask it about.
References
16 CFR 1700.15(a): "The special packaging must continue to function with the effectiveness specifications set forth in paragraph (b) of this section when in actual contact with the substance contained therein." The section also requires the packaging to remain effective for the number of openings and closings customary for its size and contents. Paragraph (c): "Special packaging for substances subject to the provisions of this paragraph shall not be reused." The effectiveness figures in paragraph (b) are described rather than quoted here: not less than 85 percent without a demonstration of the proper means of opening and not less than 80 percent after one, with a senior adult use effectiveness of not less than 90 percent for most products. The test protocols in 16 CFR 1700.20 are set out in the pet and veterinary property.
law.cornell.eduThe Davis Pack Supply catalog, measured 19 October 2026. 498 rows: 140 containers and 358 closures. 5 to 120 mL with a median of 30, which is the smallest capacity window in this library; 98 over half an ounce, 58 over an ounce, 16 over 4 oz. 95 glass, 35 PP, 9 steel, 1 metal. 79 bottles, 49 jars, 10 tins, 2 tubes. 63 glass boston rounds, 11 PP single wall jars, 9 double wall round base jars, 9 glass straight sided jars, 9 round tins, 9 double wall straight base jars, 6 glass roller ball bottles, 5 glass low profile jars. 34 clear, 21 amber, 21 white, 19 blue, 11 black, 11 frosted, 8 silver, 8 natural. Necks: 31 at 20-400, 21 unrecorded, 15 at 18DIN, 13 at 53-400, 9 at 24-400, 8 at 33-400. Closures: 202 continuous thread polypropylene lids, 45 metal or aluminum CT caps, 43 dropper assemblies, 18 dome lids, 14 phenolic, 7 sealing discs, 7 caps for glass roller ball bottles, 3 euro droppers, 2 orifice reducers. Buyability, a snapshot: 100 of 140 available, 37 not, 3 unrecorded; 40 quote only; 99 of 140 full case only.
The Davis Pack Supply catalog, measured 19 October 2026. None of the 358 closures indexed to this group is child resistant, and a catalog-wide check finds no aerosol or pressurized spray container of any kind. So neither of the two routes in 16 CFR 1700.14(a)(3) can be taken with anything on this shelf.
