Substance Information
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Key Regulatory data, the new Classification & Labelling (C&L) Inventory, and REACH Registration data can now be found in ECHA CHEM. For the time being regulatory data here are still updated daily. The old C&L Inventory was last updated on 30 September 2025. REACH Registration and C&L Inventory data will be removed from here by 18 December 2025. Due to a technical upgrade and the coming holidays, data on ECHA CHEM will remain frozen between 5 December 2025 and 10 January 2026.

Substance Information
Substance Infocard
Ozone
EC / List no.: 233-069-2
CAS no.:10028-15-6
Mol. Formula: O3
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HELPRegulatory context
Here you can find all of the regulations and regulatory lists in which this substance appears, according to the data available to ECHA. This substance has been found in the following regulatory activities (directly, or inheriting the regulatory context of a parent substance):
- ECHA Legislations
- Occupational Exposure limits (OELs)
- Emission Limit Values (ELVs)
- Other chemical legislations
- Substances predicted as likely to meet criteria for category 1A or 1B carcinogenicity, mutagenicity, or reproductive toxicity, or with dispersive or diffuse use(s) where predicted likely to meet any classification criterion for health or environmental hazards, or where there is a nanoform soluble in biological and environmental media.
- Substances undergoing an ED assessment.
- PACT - Public activities Co-ordination ToolPublic (risk management) activities co-ordination tableTool showing an overview of substances in various key regulatory processes that authorities are working on.
- Substances indicated, in 2009, as being intended to be registered by at least one company in the EEA.
- Substances which have been registered and can be placed on the EEA market by those companies with a valid registration.
- Substances for which classification and labeling data have been submitted to ECHA in a registration under REACH or notified by manufacturers or importers under CLP. Such notifications are required for hazardous substances, as such or in mixtures, as well as for all substances subject to registration, regardless of their hazard.
- Proposals for new, or updates to existing harmonised classification and labelling of substances.
- Substances listed in the EINECS, ELINCS, or NLP inventories.
| Region | Legislation | Emission medium | Process/equipment | Maximum emissions | Average emissions | Notes | |||
|---|---|---|---|---|---|---|---|---|---|
| Maximum limit | Maximum sampling duration | Average limit | Average sampling duration | ||||||
| European Union | Ambient Air Quality Directive | 1.0 h | For the implementation of Article 24 the exceedance of the Alert threshold is to be measured or predicted for three consecutive hours. | ||||||
| European Union | Ambient Air Quality Directive | 8.0 h | '8 h' in Averaging period for Limit and Target values refers to 'maximum daily 8 hour mean'. The concentration will be selected by examining 8 hour running averages calculated from hourly data and updated each hour. Each 8 hour average so calculated will be assigned to the day on which it ends i.e. the first period for any one day will be the period from 17:00 on the previous day to 1:00 on that day; the last calculation period for any one day will be the period from 16:00 to 24:00 on that day The required proportion of valid data refers to the percentage of the hourly running eight hour averages Compliance with target values will be assessed as of 1.1.2010. That is 2010 will be the first year the data for which is used in calculating compliance over the following three or five years as appropriate Target value not to be exceeded on more than 25 days per calendar year averaged over three years If the three or five year averages cannot be determined on the basis of a full and consecutive set of annual data the minimum annual data required for checking compliance with the target values will be as follows: (a) for the target value for the protection of human health: valid data for one year (b) for the target value for the protection of vegetation: valid data for three years. '8 h' in Averaging period for Long-term objectives refers to 'maximum daily eight hour mean within a calendar year' The date by which the longterm objective should be met is not defined | ||||||
| European Union | Ambient Air Quality Directive | 3.0 Months | Compliance with target values will be assessed as of 1.1.2010. That is 2010 will be the first year the data for which is used in calculating compliance over the following three or five years as appropriate If the three or five year averages cannot be determined on the basis of a full and consecutive set of annual data the minimum annual data required for checking compliance with the target values will be as follows: (a) for the target value for the protection of human health: valid data for one year (b) for the target value for the protection of vegetation: valid data for three years. The date by which the longterm objective should be met is not defined The longterm objective is expressed as the AOT40 (expressed in (µg/m3) . hours) AOT40 means the sum of the difference between hourly concentrations greater than 80 µg/m3 (= 40 parts per billion) and 80 µg/m3 over a given period using only the one-hour values measured between 8.00 and 20.00 Central European Time (CET) each day The averaging period referes to May to July | ||||||
- Annexes II VII XI XII XIII XIV - Assessment Thresholds & Limit ValuesEU. Limit, Critical, Target, Long-term Values; Alert, Info. and Assessment Thresholds - Anxes II A; VII B&C; XI B; XII A&B; XIII; XIV C, D&E, Dir 2008/50/EC, amended by Dir 2015/1480/EC, 29 Aug 2015
This list contains the Limit, Critical, Target and Long-term Values on ambient air for protection of human health and vegetation. It also contains the Alert, Information and Upper and Lower Assessment thresholds for sulphur dioxide, nitrogen dioxide, benzene, carbon monoxide, lead, PM2.5, PM10 and ozone.
- CAD - Chemical Agents Directive, Article 2(b)(i) - Hazardous AgentsEU. Hazardous Substances - Article 2(b)(i), Directive 98/24/EC on Protection of Workers from Chemical Agent-related Risks, 5 May 1998 (Table 3 of Annex VI to CLP, as amended)
This list contains a non-exhaustive inventory based on the list of substances with harmonised classification and labelling (i.e., Table 3 of Annex VI to the CLP Regulation 1272/2008/EC). While the harmonised list covers many hazardous substances, others not listed may also meet the classification criteria in accordance with the CLP Regulation.
- Construction Product Regulation - Annex I (3) - Hazardous SubstancesEU. Hazardous Substances for Purposes of Annex I (3) (Requirements for Construction Works), Regulation 305/2011/EU on Marketing of Construction Products, amended by Regulation 574/2014/EU, 28 May 2014
This list contains a non-exhaustive inventory of substances taken from: (1) Table 3 of Annex VI to CLP; (2) the Candidate List of SVHCs; (3) Annex XIV of REACH (Authorisation List); (4) Annex XVII of REACH (Restrictions List); (5) F-gases subject to emission limits/reporting per Regulation 517/2014/EU; and (6) volatile organic compounds (VOCs) listed in the Ambient Air Directive 2008/50/EC. The basis of the list is Annex I(3) of the Construction Products Regulation 305/2011/EC, which stipulates that construction works must not have a high impact on human health or the environment as a result of: giving off toxic gas; emissions of dangerous substances, volatile organic compounds (VOC), greenhouse gases or dangerous particles into indoor or outdoor air; release of dangerous substances into drinking water, ground water, marine waters, surface waters or soil.
- Construction Product Regulation - Article 6(5) - SDS and DeclarationEU. Hazardous Substances Subject to Declaration (Article 6(5)), Regulation 305/2011/EU on Marketing of Construction Products, amended by Regulation 574/2014/EU, 28 May 2014
This list contains a non-exhaustive inventory of substances originating from: (1) Table 3 of Annex VI to CLP (i.e., the list of harmonised substances); (2) the Candidate List of Substances of Very High Concern (SVHCs); and REACH Annex XIV (Authorisation List). This list is compiled on the basis of Article 6(5) of Regulation 305/2011/EC on Marketing of Construction Products. This provision requires SDSs and information on hazardous substances (i.e., SVHCs) contained in construction products be provided with the declaration of performance.
- Ecolabel - Restrictions for Hazardous Substances/MixturesEU. Hazardous Substances which may Preclude Goods from the Ecolabel Award as per Article 6(6) of Regulation 66/2010/EC, L 27/1, 30 January 2010
This list contains a non-exhaustive inventory of substances based on the list of hazardous substances with harmonised classification and labelling (i.e. Table 3 of Annex VI to the CLP Regulation), and the Candidate List of substances of very high concern (SVHCs). Pursuant to Article 6(6) of the EU Ecolabel Regulation, the ecolabel must not be awarded to goods containing substances or mixtures classified according to the CLP as toxic; hazardous to the environment; and carcinogenic, mutagenic, or toxic for reproduction (CMRs). Nor are products allowed the ecolabel award when they contain SVHCs (per Article 57 of REACH). While the CLP's harmonised list contains many such substances, other ones not listed in Table 3 may also meet the criteria specified for classification under the CLP.
- End-of-Life Vehicles Directive - Hazardous SubstancesEU. Hazardous Substances per Article 2(11) of End-of-Life Vehicles Directive 2000/53/EC, 21 October 2000, amended by Directive 2020/363/EU, 5 March 2020 (based on Table 3/Annex VI of CLP)
This list contains a non-exhaustive inventory of hazardous substances as defined by Article 2(11) of the End-of-Life Vehicles Directive 2000/53/EC. It is based on the relevant subset of substances with harmonised classification listed in Table 3 of Annex VI to the CLP Regulation 1272/2008/EC.
- Active and Intelligent Materials - CMR Substances not allowed for useEU. Carcinogens, Mutagens and Reproductive substances Not Allowed for Use in Components of Active and Intelligent Materials and Articles (Article 5(2)(c)(i)), Regulation 450/2009/EC, 30 May 2009
This list contains a non-exhaustive list of Carcinogens, Mutagens and Reproductive substances (CMRs) that are not allowed for use in components of active and intelligent materials and articles per Art. 5(2)(c)(i) of Regulation 450/2009/EC. The list is derived from a subset of substances on Table 3 of Annex VI to the CLP Regulation (1272/2008/EC).
- General Product Safety Regulation – Hazardous SubstancesEU. Hazardous substances for risk assessment of products, General Product Safety Regulation (EU) 2023/988, OJ L of 23 May 2023
This list contains a non-exhaustive inventory of substances that fall within the European Union's hazardous substance definitions, as provided in: 1/ Table 3 of Annex VI to the CLP Regulation 1272/2008/EC; 2/ Annex III of Directive 2000/54/EC (Biological Agents); 3/ REACH Candidate List of SVHCs; 4/ REACH Annex XIV (Authorisation List); and 5/ REACH Annex XVII (Restriction list). They can be considered hazardous for the purposes of the General Product Safety Regulation (EU) 2023/988.
- In Vitro Diagnostic Medical Devices Regulation - Hazardous SubstancesEU. Hazardous Substances for Purposes of Art. 5(2) and Annex I of Regulation (EU) 2017/746 on In Vitro Diagnostic Medical Devices, 5 May 2017, as corrected 27 December 2019
This list contains a non-exhaustive inventory of hazardous substances for purposes of Regulation (EU) 2017/746, including Chap. 2 (Placing on the market and putting into service) and Annex I (General Safety and Performance Requirements). It is derived from: Table 3 of Annex VI to CLP, REACH Candidate List of SVHCs, and Directive 2000/54/EC's Annex III (Biological Agents list).
- Marine Environmental Policy Framework Directive - Hazardous SubstancesEU. Hazardous Substances for Purposes of Directive 2008/56/EC (Marine Strategy Framework Directive), 25 June 2008, amended by Directive 2017/845/EU, 18 May 2017
This list contains a non-exhaustive inventory of hazardous substances for purposes of the Marine Strategy Framework Directive, especially as it concerns Art. 3(8), and Annexes I and III. The listed substances meet the European Union's definitions as hazardous, as provided on: (1) Table 3 of Annex VI to the CLP Regulation (1272/2008/EC); (2) Annex III of Directive 2000/54/EC (Biological Agents); Candidate List of SVHCs; and REACH Annex XIV (Authorisation List).
- Medical Devices Regulation - Hazardous SubstancesEU. Hazardous Substances for Purposes of Medical Devices Regulation 2017/745/EU, 5 May 2017, as amended by Regulation 2020/561/EU, 24 April 2020
This list contains hazardous substances for purposes of the Medical Devices Regulation (MDR), based on the legislation's Annex I general safety and performance requirements, including for chemical, physical and biological properties. Specifically, the non-exhaustive database is derived from: Table 3 of Annex VI to CLP, REACH Candidate List of SVHCs, and Directive 2000/54/EC's Annex III (Biological Agents list).
- Pressure Equipment Directive - Group 1 Fluids Hazardous SubstancesEU. Group 1 Fluids per Article 13(1)(a), Directive 2014/68/EU on Pressure Equipment, 27 June 2014
This list contains a non-exhaustive inventory of hazardous substances based on Article 13(1)(a) of Directive 2014/68/EU, defining Group 1 fluids for purposes of classifying pressure equipment in accordance with the Directive. The list is derived from a subset of the substances with harmonised classifications, as listed on Table 3 of Annex VI to the CLP Regulation 1272/2008/EC.
- Protection of Pregnant and Breastfeeding Workers Directive, Annex I+IIEU. Chemical Agents: Annexes I & II, Directive 92/85/EEC on Pregnant Workers, 28 November 1992 (updated by table 3 of Annex VI to CLP, 5 October 2018)
This list contains a non-exhaustive inventory of substances to which pregnant workers and workers who have recently given birth or are breastfeeding may not be exposed. Employers are obligated to prevent the exposure of these workers to any agents that may have adverse health effects on either mother or child. The inventory originates from Table 3 of Annex VI to the CLP.
- Physical, Biological and Chemical Agents & Processes and WorkEU. Non-Exhaustive List of Banned Substances, Directive 94/33/EC on Young People at Work, 20 August 1994, as amended by Dir 2014/27/EU, March 5, 2014 (Based on Table 3 of Annex VI to CLP, inter alia)
This list contains biological and chemical agents, in accordance with Art. 7 and points 2 and 3 of the Annex to Directive 94/33/EC, to which young persons (under 18 years of age) may not be exposed at the workplace. The list is a non-exhaustive inventory of such substances based on: 1) agents of risk groups 3 and 4 under Directive 2000/54/EC; 2) Table 3 of Annex VI to the CLP Regulation; 3) and Annex I of Directive 2004/37/EC.
- Safety and Health of Workers at Work Directive - Hazardous SubstancesEU. Hazardous Substances for Purposes of Directive 89/391/EEC, 29 June 1989, amended by Regulation 1137/2008/EC, 21 November 2008 (Table 3/Annex VI, CLP; Annex III, 2000/54/EC)
This list contains a non-exhaustive inventory of substances that fall within the scope of the European Union's definition of hazardous chemical and biological substances, as provided on: (1) Table 3 of Annex VI to the CLP Regulation 1272/2008/EC; and (2) Annex III of Directive 2000/54/EC (Biological Agents). The EU's Occupational Safety and Health (OSH) Framework Directive 89/391/EEC applies to risks arising from chemical, physical and biological agents at the workplace.
- Workplace Signs - minimum requirements & signs on containers and pipesEU. Workplace Signage: Annexes I and III, Directive 92/58/EEC, last amended by Directive 2014/27/EU, 5 March 2014
This list contains hazardous substances based on Table 3 of Annex VI to the CLP Regulation 1272/2008/EC. According to the annexes to Directive 92/58/EEC, storage areas and containers containing chemical substances or mixtures that are classified as hazardous according to the CLP Regulation must be duly marked and/or labeled. Directive 92/58/EEC requires employers to ensure proper signage is posted in areas where hazards cannot be avoided or reduced.
- Waste Framework Directive, Annex III - Waste - Hazardous PropertiesEU. Substances according to Hazardous Waste Properties: Annex III, Directive 2008/98/EC, 22 November 2008, amended by Directive 2018/851/EU, 14 June 2018
This list contains substances that have been assigned hazard property (HP) waste codes 1-15, as defined in terms of the hazard class and category, hazard (H) statement, and/or concentration limits provided in Annex III of the Waste Framework Directive 2008/98/EC. The classifications of the substances listed in the list are based on their harmonised classifications per Table 3 of Annex VI to the CLP Regulation 1272/2008/EC.
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