A food-grade nitrous oxide cylinder can carry several numbers, symbols and documents that describe very different things. Two of the most important are UN1070 and E942.
They are not interchangeable.
UN1070 identifies nitrous oxide in dangerous-goods transport. E942 identifies nitrous oxide within the European Union's food-additive framework.
For distributors, importers, wholesalers and professional foodservice buyers, that distinction matters. Seeing UN1070 on transport documentation identifies the substance being carried and its transport classification, but it does not, by itself, establish that the product is suitable for food use.
Food-use suitability, transport classification, safety documentation and batch-quality information answer different questions. A professional buyer should understand where each one fits.
UN1070 Nitrous Oxide at a Glance
| Item | What it means |
|---|---|
| UN number | UN1070 |
| Substance | Nitrous oxide (N₂O) |
| Transport class | 2.2 |
| Subsidiary hazard | 5.1 |
| EU food-additive designation | E942 |
| Does UN1070 prove food-grade status? | No |
| Does E942 replace transport classification? | No |
The United Nations dangerous-goods list identifies UN1070 as nitrous oxide, Class 2.2, with a 5.1 subsidiary hazard. That classification belongs to the transport context and should not be confused with food-additive specifications.
What Is UN1070 Nitrous Oxide?
UN1070 is the United Nations dangerous-goods number assigned to nitrous oxide for transport identification.
UN numbers provide a standardized way to identify substances and articles subject to dangerous-goods transport rules. They are used across transport documentation, logistics systems and applicable packaging and labelling processes.
For nitrous oxide, that identifier is UN1070.
The official United Nations Model Regulations dangerous-goods documentation lists nitrous oxide under UN1070 and records its Class 2.2 classification with a 5.1 subsidiary hazard.
The practical distinction for a buyer is straightforward:
UN1070 answers, “What dangerous good is being transported?” It does not answer, “Does this product meet the requirements for food use?”
That second question belongs to the food-additive framework, product specification and supporting quality documentation.
What Do Class 2.2 and Subsidiary Hazard 5.1 Mean?
UN1070 nitrous oxide is assigned to Class 2.2, while 5.1 is listed as a subsidiary hazard.
Class 2 covers gases. Nitrous oxide is described in the EU E942 specification as a colourless, non-flammable gas, but its transport classification also recognizes oxidizing properties through the 5.1 subsidiary hazard.
This means that “non-flammable” should not be interpreted as “without fire-related risk.” An oxidizing substance can support or intensify combustion of other materials under appropriate conditions.
For a commercial buyer or distributor, the purpose of understanding those codes is not to memorize a hazard table. It is to make sure the product is handled within the correct transport, storage and documentation framework.
The operational side of moving commercial quantities is covered separately in our guide to food-grade N2O transport and logistics, which is a better place for shipment and distribution considerations.
UN1070 vs E942: What Is the Difference?
UN1070 and E942 both relate to nitrous oxide, but they serve different regulatory purposes.
| UN1070 | E942 |
|---|---|
| Dangerous-goods transport identifier | EU food-additive designation |
| Identifies nitrous oxide in transport | Identifies nitrous oxide within food-additive legislation |
| Relevant to transport classification and logistics | Relevant to food use and food-additive specification |
| Does not prove food-grade conformity by itself | Does not replace dangerous-goods transport requirements |
| Commonly encountered in SDS and transport contexts | Commonly encountered in food-product and specification contexts |
Within European Union food-additive legislation, nitrous oxide is designated E942. Commission Regulation (EU) No 231/2012 contains the specification for E942, while Regulation (EC) No 1333/2008 provides the wider EU framework for authorized food additives.
The dedicated LUXGAS guide to the E942 food-additive designation goes further into that food-regulatory context.
For the official specification itself, professional buyers can consult the European Commission specification for food additives.
Does UN1070 Mean Nitrous Oxide Is Food Grade?
No. UN1070 does not, by itself, establish that nitrous oxide is food grade.
A cylinder, Safety Data Sheet or shipping record showing UN1070 tells you that the dangerous good is identified as nitrous oxide.
It does not, on its own, tell you:
- whether the product was supplied for food use;
- whether it meets the applicable E942 specification;
- what analytical results apply to a particular batch;
- what impurity limits were verified;
- whether appropriate food-grade controls were followed;
- how the supplied product is traced to its production or filling batch.
A transport identifier is therefore not a food-quality certificate.
This is also why food-grade and industrial nitrous oxide should not be treated as interchangeable simply because the chemical molecule is N₂O in both cases.
What Does the EU E942 Specification Require?
One useful way to improve supplier evaluation is to separate the legal E942 specification from commercial purity claims.
Commission Regulation (EU) No 231/2012 sets the following specification for E942 nitrous oxide:
| E942 specification item | EU requirement |
|---|---|
| Assay | Not less than 99% |
| Water content | Not more than 0.05% |
| Carbon monoxide | Not more than 30 μl/l |
| Nitrogen dioxide and nitrogen oxide | Not more than 10 μl/l |
These are regulatory specifications for E942 itself.
A supplier may choose to work to a tighter internal or commercial purity specification. If it does, that higher figure should be understood as the supplier's specification or quality target rather than being presented as the statutory E942 minimum.
That distinction matters because statements such as “99.9% purity” are common in commercial gas markets, while the EU E942 assay specification itself states not less than 99%.
For buyers who need to understand the quality-verification side in more detail, our guide to food-grade N2O testing, purity and quality control covers the analytical process separately.
UN1070, E942, SDS and COA: Four Different Pieces of Information
A professional buyer may encounter all four terms during the same procurement process. They should not be treated as interchangeable.
| Term | Primary purpose | What it does not replace |
|---|---|---|
| UN1070 | Identifies nitrous oxide in dangerous-goods transport | Food-additive specification or batch analysis |
| E942 | Identifies nitrous oxide in the EU food-additive framework | Dangerous-goods transport classification |
| SDS | Communicates hazard, handling, storage, transport and safety information | Batch-specific analytical results |
| COA | Provides analytical or conformity information where supplied for a product or batch | Safety and transport documentation |
UN1070 — transport identity
UN1070 identifies the dangerous good as nitrous oxide in the transport framework.
It connects the substance with the applicable dangerous-goods classification.
E942 — food-additive identity and specification
E942 identifies nitrous oxide within European food-additive legislation.
It is relevant when the product is intended to enter food applications covered by that framework.
SDS — safety and hazard information
A Safety Data Sheet communicates information about a substance's hazards and includes sections covering matters such as identification, hazard classification, handling and storage, exposure controls and transport information.
The EU REACH framework sets out a standardized 16-section structure for Safety Data Sheets. The official requirements can be reviewed in Regulation (EC) No 1907/2006 and its SDS requirements.
An SDS should therefore not be treated as a substitute for analytical information about a particular batch.
COA — analytical or conformity information
A Certificate of Analysis typically provides analytical or conformity information associated with the product or batch according to the supplier's quality system and specification.
Its role is different from the SDS.
The LUXGAS guide to COA and SDS documentation for food-grade nitrous oxide explains the distinction in more detail for distributors and procurement teams.
Where Might a B2B Buyer Encounter UN1070?
A professional buyer can encounter UN1070 at several points in the supply chain.
Depending on the applicable transport and documentation requirements, these may include:
- Safety Data Sheets;
- dangerous-goods transport documentation;
- shipping and logistics records;
- applicable transport labels or markings;
- carrier systems;
- warehouse documentation;
- import or distribution paperwork.
Its presence identifies the transport substance, but it should not be used as shorthand for every other product characteristic.
UN1070 does not tell you the batch purity.
UN1070 does not tell you whether the product was produced or supplied for food use.
UN1070 does not replace the SDS.
UN1070 does not replace the E942 specification or appropriate quality documentation.
This separation becomes particularly useful when a procurement team compares suppliers whose documents present the same information in different formats.
Why UN1070 Matters to Distributors and Wholesalers
A professional kitchen buying for direct use and an importer receiving commercial quantities encounter the same substance, but their operational requirements can be very different.
For distributors and wholesalers, the UN1070 transport identity sits within a wider process that may involve:
- carrier qualification;
- warehouse procedures;
- cross-border movement;
- staff competence and training;
- dangerous-goods documentation;
- customer documentation requests;
- product traceability;
- onward distribution.
The objective is not simply to find “UN1070” somewhere in the paperwork and consider the review complete.
A stronger procurement process checks whether the transport identity, food-use specification, safety documentation and quality information all correspond to the product being supplied.
The broader responsibilities involved in professional distribution are covered in our guide to N2O regulations and distributor responsibilities in Europe.
What Should Food-Grade N2O Buyers Verify Beyond UN1070?
UN1070 is one checkpoint, not the complete supplier review.
A professional buyer can separate the evaluation into the following areas.
1. Substance and transport identification
Confirm that the transport information correctly identifies the substance being supplied.
For nitrous oxide, the UN dangerous-goods identifier is UN1070.
2. Intended food use
Confirm that the product is actually being supplied and specified for the intended food application rather than assuming that all grades of nitrous oxide are equivalent.
3. E942 specification
For food applications within the EU framework, understand how the supplied product relates to the current E942 specification.
4. Safety documentation
Review the current SDS and make sure the product identity and supplier information correspond to the material being purchased.
5. Analytical or batch documentation
Where a COA or other analytical documentation is part of the supply arrangement, check that the product and batch identifiers correspond to the delivered material.
6. Traceability
Professional supply systems should provide an appropriate route for linking delivered products to the relevant batch or production records.
7. Packaging and logistics suitability
Confirm that the packaging configuration and logistics arrangements are appropriate for the quantity, destination, route and applicable regulations.
8. Supplier verification
Documentation is more useful when product identity, supplier information, specifications and traceability records remain consistent across the supply chain.
The broader commercial process is covered in our B2B sourcing guide for food-grade nitrous oxide, which focuses on supplier qualification, formats, documentation and procurement rather than transport classification alone.
Common UN1070 Documentation Mistakes
Mistake 1: Treating UN1070 as proof of food-grade quality
UN1070 identifies nitrous oxide for dangerous-goods transport. It does not certify the food-grade status of the product.
Mistake 2: Treating E942 as the transport classification
E942 belongs to the food-additive framework. It does not replace UN1070 or the applicable dangerous-goods transport requirements.
Mistake 3: Treating an SDS as a batch purity certificate
The SDS communicates safety and hazard information. Analytical or batch conformity information belongs in the appropriate quality documentation.
Mistake 4: Assuming a 99.9% commercial claim is the legal E942 minimum
The EU E942 specification states an assay of not less than 99%, together with specified impurity limits.
A supplier may operate to a tighter specification, but that higher commercial target should not be confused with the legal E942 assay requirement.
Mistake 5: Assuming the same transport procedure applies to every shipment
Dangerous-goods requirements can depend on factors including the transport mode, quantity, packaging, route and jurisdiction.
A general article cannot determine the legal requirements for a specific shipment.
How Does UN1070 Fit Into ADR?
For road transport in Europe and other ADR contracting parties, the Agreement concerning the International Carriage of Dangerous Goods by Road (ADR) provides the relevant international framework.
The current ADR framework covers areas including classification, packaging, consignment, carriage, equipment, vehicle requirements, training and safety obligations.
Professional buyers and distributors can consult the official UNECE ADR 2025 materials for the applicable regulatory text.
The important boundary for this article is:
This guide explains what UN1070 means. It does not determine the ADR requirements applicable to a particular shipment.
Shipment-specific requirements should be established using the current rules and, where appropriate, the carrier, dangerous-goods adviser or another qualified professional.
A Simple Way to Read N2O Documentation
When evaluating food-grade N₂O supply, four questions help keep the terminology clear.
What substance is being transported?
UN1070 identifies nitrous oxide.
How is the dangerous good classified?
Nitrous oxide is listed as Class 2.2 with a 5.1 subsidiary hazard.
What identifies nitrous oxide in the EU food-additive framework?
E942.
What do the safety and quality documents say about the supplied product?
Review the SDS together with the relevant supplier specification, traceability information and analytical documentation where supplied.
Those four questions are related, but none should be used as a substitute for the others.
Frequently Asked Questions About UN1070 Nitrous Oxide
What is UN1070?
UN1070 is the United Nations dangerous-goods number assigned to nitrous oxide for transport identification.
What is the UN number for nitrous oxide?
The UN number for nitrous oxide is UN1070.
What class is UN1070 nitrous oxide?
UN1070 nitrous oxide is listed as Class 2.2 with a 5.1 subsidiary hazard.
Is UN1070 the same as E942?
No. UN1070 identifies nitrous oxide in dangerous-goods transport, while E942 identifies nitrous oxide within the EU food-additive framework.
Does UN1070 mean nitrous oxide is food grade?
No. UN1070 identifies the substance for transport purposes. Buyers sourcing nitrous oxide for food applications should separately verify the intended food use, relevant E942 specification and appropriate supplier documentation.
What does E942 mean?
E942 is the E-number assigned to nitrous oxide within European Union food-additive legislation. The EU specification includes an assay of not less than 99% together with defined impurity limits.
Is nitrous oxide flammable?
The EU E942 specification describes nitrous oxide as a non-flammable gas. Its dangerous-goods classification nevertheless includes a 5.1 oxidizing subsidiary hazard, so non-flammable should not be interpreted as meaning there is no combustion-related hazard.
Is an SDS the same as a COA?
No. An SDS communicates safety, hazard, handling and transport information. A COA, where supplied, generally communicates analytical or conformity information associated with a product or batch. They serve different purposes.
Should distributors check both UN1070 and E942?
For nitrous oxide being sourced for food applications, professional buyers should understand both contexts: UN1070 for dangerous-goods transport identification and E942 for the EU food-additive framework. The exact documentation and legal obligations depend on the product, business, destination and transport arrangement.
Where can I verify the UN1070 classification?
The classification can be checked in official United Nations dangerous-goods documentation and the applicable transport regulations rather than relying solely on commercial product pages.
UN1070 Is One Part of the Product Identity
For a professional buyer, UN1070 is useful precisely because it has a specific purpose.
It identifies nitrous oxide within dangerous-goods transport.
It does not certify food-grade conformity, replace E942 specifications, provide batch analysis or remove the need to review safety and supplier documentation.
A stronger procurement process keeps those functions separate:
UN1070 for transport identity.
E942 for the food-additive context.
SDS for safety and hazard information.
COA or equivalent analytical documentation for product or batch conformity where supplied.
When those records correspond clearly to the same traceable product, distributors, wholesalers and professional buyers have a much stronger basis for evaluating food-grade N2O supply.
