Which markings should chemical goggles carry?
Under EN 166 and the newer EN 16321:2022/A1:2025 standard (which is replacing EN 166), goggles and face shields intended for chemical use are marked with the code ‘3’.
A ‘3’ marking indicates protection against liquid droplets and splashes, making it suitable for tasks such as spraying and pouring chemicals. Depending on the chemical hazard, it may be prudent to use a goggle carrying the‘5’ marking, which signifies protection against gas and fine dust particles, alongside appropriate respiratory protection where required.
When should you add a face shield?
For the highest level of safety, especially during high-risk tasks, it's recommended to wear **both goggles and a **face shield. This combination offers:
- Sealed eye protection from the goggles
- Full facial coverage from the face shield
Will the lens stand up to the chemical?
However, it’s important to be aware that eye and face protectors are not resistant to prolonged or repeated contact with all chemicals. If the lens material becomes damaged, discoloured, or brittle after exposure to a substance, it must be replaced immediately.
Lens materials such as polycarbonate, acetate, and co-polyester each respond differently to various chemical hazards. To identify the best option for your specific application, send the chemical name and exposure time to technical@jspsafety.com.
Summary of key points:
Use indirect-vent goggles and face shields marked ‘3’ (D3), or non-vented goggles marked ‘5’ where protection against gas and fine dust particles is required.
- For higher-risk tasks, **combine goggles and a **face shield.
Consider appropriate respiratory protection where required, depending on the chemical hazard.
- Inspect PPE regularly – do not use if the lens shows signs of damage, discolouration, or brittleness.
- Lens material selection depends on the chemical – consult JSP Technical for advice.
Last reviewed: 28 October 2026. Sources: EN 166; EN 16321:2022/A1:2025; PPE at Work Regulations 1992.