Is Nitrous Oxide legal in Australia?

Also known as: laughing gas, whippets, nangs

Legal status

Scheduled poison; no Commonwealth criminal drug status. F2026L01327 places nitrous oxide in Schedule 4 «NITROUS OXIDE for therapeutic use.» and in Schedule 6, the poisons schedule, «NITROUS OXIDE except when included in Schedule 4.», with first aid and warning statement requirements in Appendices E and F. It is not listed in Schedule 1 or Schedule 2 of the Criminal Code Regulations 2019 (Compilation No. 6). Nearest listed drug: none: nitrous oxide is an inorganic gas with no carbon, and every listed drug is an organic compound. Limb (a) of s301.9(1) does not reach it because no listed drug has the formula N2O or is an isomer of it, and it is not an alkaloid; limb (c) does not, because the s301.9(1)(c) modifications act on a listed drug's carbon skeleton and none yields a carbon-free two-nitrogen oxide; and on the method stated next limb (d) does not, because it is not similar in chemical structure to any listed drug. The method used for every row is a reading, not a rule the Act states: a modification that limb (a) or limb (c) plainly describes is treated as making a drug analogue; one contestable modification (a swap within one paragraph of s301.9(2), or a core ring replaced), a single limb (d) change from the listed drug, or an express exclusion or different listing in the Regulations is treated as making the exposure conditional; anything more, including adding or removing a ring, is treated as outside s301.9. Because s301.9(1)(c) allows a modification «obtained in one or more of the following ways», the tier this gives can depend on how a change is described, and nothing read settles which description governs. No court decision applying s301.9 to nitrous oxide was read, so this is a reading of the text. Nor is it named in Schedule 4 of the Customs (Prohibited Imports) Regulations 1956 as in force on 2 October 2026. The Poisons Standard read is the Poisons Standard October 2026 (Federal Register of Legislation F2026L01327, made 28 September 2026, registered 30 September 2026, in force from 1 October 2026 under its s2, replacing the June 2026 issue; no later issue was registered when it was read). This cell states Commonwealth law only. The Poisons Standard has effect through adoption by each state and territory: its Reader's guide, which s5(1) of the instrument says is not part of it, states «The scheduling of poisons is implemented through relevant State and Territory legislation.» Most personal possession and use offences are state and territory law, which differs by jurisdiction, and Criminal Code s300.4 keeps those laws running concurrently with Part 9.1. Read as in force on 2 October 2026 against F2026L01327, the Criminal Code Act 1995 at Compilation No. 174 (compilation date 30 June 2026, C2026C00243), the Criminal Code Regulations 2019 at Compilation No. 6 (compilation date 13 December 2025, F2025C01260) and the Customs (Prohibited Imports) Regulations 1956 at Compilation No. 147 (compilation date 13 July 2026, F2026C00751). The Criminal Code Regulations schedules are made by the Governor-General and the Poisons Standard by a delegate of the Secretary under Therapeutic Goods Act 1989 s52D, so a later instrument can change any of this, and this reading does not rule out a later amendment.

Consequences if caught

Capital exposure: none. The highest penalty anywhere in Part 9.1 of the Criminal Code is imprisonment for life, and Death Penalty Abolition Act 1973 s6 provides «The punishment of death must not be imposed as the penalty for any offence referred to in subsection 3(2) or (3).» No Commonwealth criminal offence reaches possession, sale, supply, manufacture or use of nitrous oxide: it is not a controlled or border controlled drug, and it is not a prohibited import under Schedule 4 of the Customs (Prohibited Imports) Regulations 1956 (Compilation No. 147), so the Customs Act 1901 s233 offence for prohibited imports does not reach its import. Supply is controlled by state and territory poisons law applying its Poisons Standard schedule. Part 9.2 of the Criminal Code is the residual import offence: s320.2 punishes importing a psychoactive substance by 5 years or 300 penalty units, or both, and s320.3 importing a substance presented as a serious drug alternative by 2 years or 120 penalty units, or both; s320.2(2) excludes listed or registered therapeutic goods, goods represented for therapeutic use other than as a serious drug alternative, industrial chemicals, a plant or fungus or an extract from one, any serious drug or precursor, and any prohibited import within the meaning of the Customs Act. Part 9.2 resolved: s320.2 does not reach an import of nitrous oxide, because s320.2(2)(i) excludes «an industrial chemical within the meaning of the Industrial Chemicals Act 2019». That Act (Compilation No. 6, compilation date 14 October 2024) makes an industrial chemical, in s10(1)(b), «a compound or complex of a chemical element that has an industrial use», and s9 defines industrial use as «a use other than (or in addition to)» agricultural, veterinary, therapeutic, vaping, food and feed uses and any use the rules prescribe. Nitrous oxide is used as an anaesthetic, a food propellant and an industrial gas; the industrial gas use is outside the excluded list. The Industrial Chemicals (General) Rules 2019 (Compilation No. 7) prescribe no use for that definition and exclude only «radioactive chemicals» under s10(2), so nitrous oxide is an industrial chemical and s320.2 does not apply whatever product it is sold in. s320.3 has no industrial chemical exclusion and no prohibited import exclusion, so importing nitrous oxide in a presentation that includes «an express or implied representation that the substance is a serious drug alternative» is an offence against s320.3, imprisonment for 2 years or 120 penalty units, or both, unless it is a listed or registered therapeutic good (s320.3(3)(b)) or food for which there is a standard (s320.3(3)(a)). That last exception decides it for nitrous oxide: the Food Standards Australia New Zealand Act 1991 s5(1)(b) makes food include «any substance or thing of a kind used, capable of being used, or represented as being for use, as an ingredient or additive» in food, and the Food Standards Code Schedule 16 (Compilation No. 3, compilation date 16 September 2025), which states «This instrument is a standard under the Food Standards Australia New Zealand Act 1991 (Cth).», lists «Nitrous oxide 942» among «the additives permitted at GMP». Nitrous oxide is therefore food for which there is a standard, and s320.3(3)(a) and s320.2(2)(a) exclude it as well, so on the text neither Part 9.2 offence reaches an import of nitrous oxide, however it is presented. No decision applying the food exclusion to a canister sold for inhalation was read for this cell. Retail sale restrictions on canisters are state and territory law. There is no Commonwealth offence of using or consuming a drug; use is left to state and territory law. A penalty unit is $364 for an offence committed on or after 1 July 2026 under the Crimes (Amount of a Penalty Unit) Instrument 2026 (F2026N00424), made under Crimes Act 1914 s4AA, so 400 penalty units is $145,600, 2,000 is $728,000 and 7,500 is $2,730,000; «or both» in each penalty means the prison term and the fine are available alternatively or together.

If prescribed or medical

For therapeutic use it is Schedule 4. The Reader's guide, which is not part of the instrument, describes Schedule 4 as «Substances, the use or supply of which should be by or on the order of persons permitted by State or Territory legislation to prescribe and should be available from a pharmacist on prescription.»

Documentation

No traveller rule is specific to nitrous oxide; its import is not prohibited by the Customs (Prohibited Imports) Regulations, and pressurised gas cylinders are subject to aviation dangerous goods rules not read for this cell.

Drug laws and enforcement change and vary within a country. This is not legal advice. Always confirm with Australia’s embassy or official drug authority before traveling; penalties can be severe, including imprisonment.