Lasers and laser-related equipment - Test methods for laser-induced damage threshold - Part 3: Assurance of laser power (energy) handling capabilities (ISO 21254-3:2011); German version EN ISO 21254-3:2011
Edition 2011-10

Stationary source emissions - Determination of the mass concentration of dinitrogen monoxide (N₂O) - Reference method: Non-dispersive infrared method (ISO 21258:2010); German version EN ISO 21258:2010
Edition 2010-11

Nanotechnologies - Measurements of particle size and shape distributions by transmission electron microscopy (ISO 21363:2020); German version EN ISO 21363:2022
Edition 2022-03

Paints and varnishes - Determination of the resistance to rubbing using a linear abrasion tester (crockmeter) (ISO 21546:2019); German version EN ISO 21546:2020
Edition 2021-02

Foodstuffs - Methods of analysis for the detection of genetically modified organisms and derived products - Qualitative nucleic acid based methods (ISO 21569:2005 + Amd 1:2013); German version EN ISO 21569:2005 + A1:2013
Edition 2013-08

Information container for linked document delivery - Exchange specificaton - Part 1: Container (ISO 21597-1:2020); German version EN ISO 21597-1:2020
Edition 2021-07

Dentistry - Elastomeric auxiliaries for use in orthodontics (ISO 21606:2022); German version EN ISO 21606:2022
Edition 2023-02

Solid recovered fuels - Sample preparation (ISO 21646:2022); German version EN ISO 21646:2022
Edition 2022-09

Textiles - Determination of fabric deformability by forced mechanical distension (ISO 21765:2020); German version EN ISO 21765:2021
Edition 2021-04

Gas turbine applications - Safety (ISO 21789:2022); German version EN ISO 21789:2022
Edition 2023-07