HazMat Tool — substance information Reference only — not a shipping paper, placard mandate, or CVI record.

Self-defense spray, non-pressurized

HMT 15 June 2026

UN / ID: NA 3334
Hazard class: 9
Packing group: III
ERG guide: —
Special provisions: SP A37
Source: 49 CFR §172 (15 June 2026)

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Self-defense spray, non-pressurized

Self-defense, or self-defence in Commonwealth English, is a countermeasure that involves defending the health and well-being of oneself from harm. The use of the right of self-defense as a legal justification for the use of force in times of danger is available in many jurisdictions. Self-defense in the context of a home invasion or trespassing is also known as home defense Wikipedia

Hazardous Materials Table

Source: 49 CFR §172 (15 June 2026)

(3) Hazard class

9
Miscellaneous hazardous materials

(4) Identification number

NA 3334

(5) Packing Group

III

(6) Labels

(1) Symbols

This entry is signed with plus (+). The plus (+) sign fixes the proper shipping name, hazard class and packing group for that entry without regard to whether the material meets the definition of that class, packing group or any other hazard class definition. When the plus sign is assigned, it means that the material is known to pose a risk to humans. When a plus sign is assigned to mixtures or solutions containing a material where the hazard to humans is significantly different from that of the pure material or where no hazard to humans is posed, the material may be described using an alternative shipping name that represents the hazards posed by the material. An appropriate alternate proper shipping name and hazard class may be authorized by the Associate Administrator.
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 "D". The letter "D" identifies proper shipping names which are appropriate for describing materials for domestic transportation but may be inappropriate for international transportation under the provisions of international regulations (e.g., IMO, ICAO). An alternate proper shipping name may be selected when either domestic or international transportation is involved.

(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.

A37	This entry applies only to a material meeting the definition in § 171.8 of this subchapter for self-defense spray. Browse special provision A37

(8) Packing Authorizations (§173.***)

(8A) Exceptions	155	see 49 CFR §173.155
(8B) Non-bulk	203	see 49 CFR §173.203
(8C) Bulk	None

(9) Quantity Limits

(9A) Passenger aircraft/rail	No limit
(9B) Cargo aircraft only	No limit

(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	—

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 3168	Gas sample, non-pressurized, toxic, flammable, n.o.s., not refrigerated liquid	2.3
UN 3164	Articles, pressurized pneumatic or hydraulic containing non-flammable gas	2.2
UN 3167	Gas sample, non-pressurized, flammable, n.o.s., not refrigerated liquid	2.1
UN 3169	Gas sample, non-pressurized, toxic, n.o.s., not refrigerated liquid	2.3
	Accumulators, pressurized, pneumatic or hydraulic (containing non-flamable gas), see Articles pressurized, pneumatic or hydraulic (containing non-flamable gas)
	Pepper spray, see Aerosols, etc. or Self-defense spray, non-pressurized
UN 1003	Air, refrigerated liquid, (cryogenic liquid) non-pressurized	2.2
NA 1057	Lighters, non-pressurized, containing flammable liquid,	3