What is INSST
The INSST is an autonomous body of the General State Administration, with its own legal personality and attached to the Ministry of Labour and Social Economy. Its full name, National Institute for Safety and Health at Work, OA, MP, comes from Royal Decree 903/2018, which updated its statutes and replaced the previous name of National Institute for Safety and Hygiene at Work (INSHT).
It is not a ministry, nor an inspection agency, nor a university research center. It is a specialized scientific and technical body within the Spanish Administration whose function is to analyze, investigate and disseminate knowledge about working conditions, and to provide technical assistance to other administrations and social partners.
Its headquarters are located in Madrid, at 73 Torrelaguna Street, and it has national centers specializing in different preventive matters spread throughout Spain.
Legal origin and evolution
The institute’s origins lie in the National Plan for Occupational Health and Safety, established in 1970. The autonomous body itself was created by Royal Decree-Law 36/1978, of November 16, which configured it as an autonomous body of an administrative nature attached to the Ministry of Labor.
Royal Decree 577/1982 established its structure and powers. Law 31/1995 on Occupational Risk Prevention assigned it the functions it continues to perform today as the technical reference for the Spanish prevention system. The most recent significant update to its statutes and name is Royal Decree 903/2018, which established its current name and legal framework.
Functions attributed to it by Article 8 of Law 31/1995
Article 8 of Law 31/1995 establishes the INSST as the specialized scientific and technical body of the General State Administration that has, among others, the following functions.
- Analysis and study of working conditions and their impact on the safety and health of workers.
- Development and updating of technical guides, technical criteria and technical prevention notes (NTP) for the assessment and prevention of risks.
- Setting occupational exposure limits for chemical, physical and biological agents.
- Technical assistance to the Labor and Social Security Inspectorate, public administrations, prevention services and companies and workers.
- General Secretariat of the National Commission for Safety and Health at Work , the collegiate body for institutional participation in preventive matters.
- International cooperation with European Union bodies and the International Labour Organization on occupational safety and health.
Technical documentation: NTP, technical guides and exposure limits
The INSST’s best-known product is its Technical Prevention Notes (NTPs), short, monographic documents that address a specific risk or preventive technique, such as an NTP dedicated to hazardous chemical reactions with water. NTPs are advisory in nature: they are not legally binding regulations, but they constitute the most frequently cited technical reference in Spanish occupational safety and health practice.
Technical guides elaborate more extensively on the application of a specific royal decree, such as those that regulate workplaces, work equipment or chemical agents, and are also of a non-binding guidance nature, although following them makes it easier to prove compliance with the standard they develop.
Occupational exposure limits (OELs), published annually, set reference values for exposure to chemical agents in the air of workplaces. Together with technical criteria on specific biological, physical, and chemical agents, they form the set of documentary databases, such as INFOCARQUIM or FISQ, which the INSST keeps updated for use by prevention technicians and prevention services.
What the INSST is not: distinction from the Labor Inspectorate
A common misconception is that the INSST (National Institute for Safety and Health at Work) has sanctioning or inspection powers. The INSST does not inspect workplaces, issue violation reports, or impose sanctions. That function belongs exclusively to the Labor and Social Security Inspectorate , to which the INSST provides technical assistance when required to assess technical aspects of a case.
The role of the INSST is therefore scientific, technical, and institutionally supportive, not one of monitoring regulatory compliance. This distinction is relevant for any professional who cites INSST documentation: following a Technical Prevention Note (NTP) or a technical guide informs preventive action, but does not replace the analysis of the applicable legal text nor exempt one from the obligations established therein.
Relationship with the ORP International Foundation
The ORP International Foundation’s institutional advisory committee comprises public bodies, professional associations, and insurance companies from various countries. The INSST (National Institute for Safety and Health at Work) is listed as the leading scientific and technical body for the Spanish occupational health and safety system. Membership in this committee does not constitute a collaboration agreement nor does it alter the functions assigned to it by Article 8 of Law 31/1995: the institute continues to operate exclusively within that legal framework.
Practical application
For occupational health and safety professionals, the INSST (National Institute for Safety and Health at Work) is the standard reference source for consulting occupational exposure limit values before conducting hygiene measurements, for locating a Technical Note on a specific risk, or for guiding the development of a preventive procedure when the legal standard does not specify how to implement it. Its documentation is publicly and freely accessible, making it the standard starting point for preparing risk assessments and prevention plans in Spain.
For a company or a prevention service, knowing that the INSST does not have an inspection function helps to correctly interpret its publications: they are technical support, not a direct legal requirement, although in practice the courts and the Labor Inspectorate itself usually take its criteria as a reference for the required due diligence.
