GHS precautionary statement
P271: Use only outdoors or in a well-ventilated area
- P271
- Prevention
P271 says: “Use only outdoors or in a well-ventilated area”. 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 P271
The GHS data recommends P271 for these hazard statements.
| Code | Statement | Hazard class and category | Signal word |
|---|---|---|---|
| H330 | Fatal if inhaled | Acute toxicity, inhalation — Category 1, 2 | Danger |
| H331 | Toxic if inhaled | Acute toxicity, inhalation — Category 3 | Danger |
| H332 | Harmful if inhaled | Acute toxicity, inhalation — Category 4 | Warning |
| H334 | May cause allergy or asthma symptoms or breathing difficulties if inhaled | Sensitization, respiratory — Category 1, 1A, 1B | Danger |
| H335 | May cause respiratory irritation | Specific target organ toxicity, single exposure; Respiratory tract irritation — Category 3 | Warning |
| H336 | May cause drowsiness or dizziness | Specific target organ toxicity, single exposure; Narcotic effects — Category 3 | Warning |
Chemicals using P271
67 chemicals in our database (showing the first 60 alphabetically). Classification comes from each chemical's primary GHS source, so a supplier's SDS may differ.
P271 frequently asked questions
What does P271 mean?
P271 says: "Use only outdoors or in a well-ventilated area". It is a prevention precautionary statement in the Prevention (P200 series).
Which hazards call for P271?
In the GHS data, P271 is recommended for hazard statements H330, H331, H332, H334, H335, H336.
What type of statement is P271?
P271 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)