HazMat Tool — substance information

Aviation regulated liquid, n.o.s

HMT May 2026

UN / ID: UN 3334
Hazard class: 9
Packing group: —
ERG guide: ERG 171
Special provisions: SP A35, SP A189
Source: 49 CFR §172 (2026/05)

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Aviation regulated liquid, n.o.s

Emergency Response Guide No. 171

Hazardous Materials Table

Source: 49 CFR §172 (2026/05)

(3) Hazard Class

9
Miscellaneous hazardous materials

This entry is signed with "A". The letter "A" denotes a material that is subject to the requirements of this subchapter only when offered or intended for transportation by aircraft, unless the material is a hazardous substance or a hazardous waste. A shipping description entry preceded by an "A" may be used to describe a material for other modes of transportation provided all applicable requirements for the entry are met.
This entry is signed with "G". The letter "G" identifies proper shipping names for which one or more technical names of the hazardous material must be entered in parentheses, in association with the basic description. (See §172.203(k)).

(7) Special Provisions (§172.102)

×Note:
Special provisions may be very complex. The extracts are taken from 49 CFR §172.102. Please be careful with the information, as necessary, additional conditions may be applied that are not written here. Please check the original source and report bugs.

A35	This includes any material which is not covered by any of the other classes but which has an anesthetic, narcotic, noxious or other similar properties such that, in the event of spillage or leakage on an aircraft, extreme annoyance or discomfort could be caused to crew members so as to prevent the correct performance of assigned duties. Browse special provision A35
A189	Except where the defining criteria of another class or division are met, concentrations of formaldehyde solution: a. With less than 25 percent but not less than 10 percent formaldehyde, must be described as UN3334, Aviation regulated liquid, n.o.s.; and b. With less than 10 percent formaldehyde, are not subject to this subchapter. Browse special provision A189

(8) Packing Authorizations (§173.***)

(8A) Exceptions	155	see 49 CFR §173.155
(8B) Non-bulk	204	see 49 CFR §173.204
(8C) Bulk	n/a	see 49 CFR §173. n/a

(9) Quantity Limits

(9A) Passenger aircraft/rail	450 L
(9B) Cargo aircraft only	450 L

(10) Vessel stowage

(10A) Location	A Stowage category “A” means the material may be stowed “on deck” or “under deck” on a cargo vessel or on a passenger vessel. Source: 49 CFR §172.101(k)
(10B) Other	n/a

Segregation chart for load, transport, and storage

This chart shows whether loading, transport, or storage with other hazard classes is permitted, prohibited, or restricted. Based on 49 CFR §177.848.

No compatibility information for class 9 in 49 CFR §177.848 included.

Scope & sources (important)Click to show CFR references

This check evaluates segregation per 49 CFR §177.848. Additional loading/unloading and handling requirements may still apply; see 49 CFR §177 Subpart B (Loading and Unloading):

§177.834 - General requirements
§177.835 - Class 1 materials
§177.837 - Class 3 materials
§177.838 - Class 4 (flammable solid) materials, Class 5 (oxidizing) materials, and Division 4.2 (pyroforic liquid) materials
§177.839 - Class 8 (corrosive) materials
§177.840 - Class 2 (gases) materials
§177.841 - Division 6.1 and Division 2.3 materials
§177.842 - Class 7 (radioactive) material
§177.843 - Contamination of vehicles

Similar substances

UN / ID	Proper shipping name	Hazard class
UN 3291	Regulated medical waste, n.o.s. or Clinical waste, unspecified, n.o.s. or (BIO) Medical waste, n.o.s. or Biomedical waste, n.o.s., or Medical Waste n.o.s.	6.2
NA 3082	Other regulated substances, liquid, n.o.s	9
UN 3335	Aviation regulated solid, n.o.s	9
NA 3077	Other regulated substances, solid, n.o.s	9