GHS precautionary statement
P222: Do not allow contact with air
- P222
- Prevention
P222 says: “Do not allow contact with air”. It is a prevention statement. P200 series: actions to take before and during use to prevent or minimise harm, such as avoiding ignition sources, using ventilation and wearing protective equipment.
About the prevention group
P200 series: actions to take before and during use to prevent or minimise harm, such as avoiding ignition sources, using ventilation and wearing protective equipment. See all precautionary statements for the full list.
Hazards that call for P222
The GHS data recommends P222 for these hazard statements.
| Code | Statement | Hazard class and category | Signal word |
|---|---|---|---|
| H220 | Extremely flammable gas | Flammable gases — 1A: Flammable gas, Pyrophoric gas, Chemically unstable gas A,B | Danger |
| H232 | May ignite spontaneously if exposed to air | Flammable gases — 1A, Pyrophoric gas | Danger |
| H250 | Catches fire spontaneously if exposed to air | Pyrophoric liquids — Category 1 Pyrophoric solids — Category 1 | Danger |
Chemicals using P222
10 chemicals in our database. Classification comes from each chemical's primary GHS source, so a supplier's SDS may differ.
P222 frequently asked questions
What does P222 mean?
P222 says: "Do not allow contact with air". It is a prevention precautionary statement in the Prevention (P200 series).
Which hazards call for P222?
In the GHS data, P222 is recommended for hazard statements H220, H232, H250.
What type of statement is P222?
P222 is in the Prevention (P200 series). P200 series: actions to take before and during use to prevent or minimise harm, such as avoiding ignition sources, using ventilation and wearing protective equipment.
Precautionary statements are general recommendations. Follow the specific instructions on your product's label and safety data sheet.
https://pubchem.ncbi.nlm.nih.gov/ghs/ghscode_10.txt (UN GHS Revision 10, retrieved 2026-10-12)