Substances and filter types
| Substance | Boiling point (approx.) | Filter type |
|---|---|---|
| Acetone | 56 °C | AX (not in the range) |
| Methanol | 65 °C (just below) | AX (not in the range) |
| Ethyl acetate | 77 °C | A |
| Ethanol | 78 °C | A |
| Isopropanol | 82 °C | A |
| Toluene | 111 °C | A |
| Xylene | 138 to 144 °C | A |
| Hydrochloric acid (hydrogen chloride) | gas | E |
| Sulphur dioxide | gas | E |
| Hydrogen sulphide | gas | B |
| Ammonia | K | |
| Chlorine | B | |
| Hydrogen cyanide | B | |
| Paints, isocyanates | A + P3 | |
| Welding fume | P3 | |
| Wood dust | P3 / FFP | |
| Quartz dust | P3 / FFP | |
| Flour and feed dust | P3 / FFP | |
| Mould spores | P3 / FFP |
| Type | Protects against | AirGuard Pro |
|---|---|---|
| A | Organic gases and vapours with a boiling point above 65 °Ce.g. Solvents such as toluene, xylene or white spirit | in the range |
| B | Inorganic gases and vapourse.g. Chlorine, hydrogen sulphide, hydrogen cyanide | in the range |
| E | Sulphur dioxide, hydrogen chloride and other acid gases | in the range |
| K | Ammonia and organic ammonia derivativese.g. Amines | in the range |
| P | Particles: dust, smoke, miste.g. Classes P1, P2, P3 | in the range |
| AX | Organic compounds with a boiling point up to 65 °C | not in the range |
| SX | Substances named by the manufacturer | not in the range |
| NO-P3 | Nitrous gases (nitrogen oxides) | not in the range |
| Hg-P3 | Mercury vapour | not in the range |
How to read the table
- Type A, B, E, K: gas filters to EN 14387. The type depends on the substance, the class on the concentration.
- P3, FFP: particle filters and masks against solid particles, mist and fume, not gases.
- Mixtures: With paints, cleaners and thinners the lowest boiling point of all components counts.
- Limits: Without a known concentration, in an incident or without a safe oxygen content a filtering respirator is not permitted.
The terms are in the glossary. If you know substance and concentration, the respirator finder leads to the matching combination.
Frequently asked questions
Where do the boiling points come from?
As guide values from the GESTIS substance database of the DGUV. The statements in the safety data sheet of your product, section 9, are decisive.
What if my substance is not on the list?
Look in the safety data sheet (sections 3, 8 and 9) and in the GESTIS substance database. When in doubt the occupational safety specialist clarifies which device is needed. Feel free to write to us through the enquiry.
Why are acetone and methanol missing among the filters?
Both boil at 65 °C or below. AX filters are intended for them, which the AirGuard Pro range does not include.
Sources
- GESTIS substance database (DGUV, IFA, Germany)
- DGUV Rule 112-190 “Use of respiratory protective devices” (Germany), November 2021 edition
- TRGS 900 Workplace exposure limits (BAuA, Germany)
- Hazardous Substances Ordinance (GefStoffV, Germany)
- Instructions for use and data sheets of the AirGuard Pro products
