GHS precautionary statement
P233: Keep container tightly closed
- P233
- Prevention
P233 says: “Keep container tightly closed”. 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 P233
The GHS data recommends P233 for these hazard statements.
| Code | Statement | Hazard class and category | Signal word |
|---|---|---|---|
| H206 | Fire, blast or projection hazard; increased risk of explosion if desensitizing agent is reduced | Desensitized explosives — Category 1 | Danger |
| H207 | Fire or projection hazard; increased risk of explosion if desensitizing agent is reduced | Desensitized explosives — Category 2 Desensitized explosives — Category 3 | Danger |
| H208 | Fire hazard; increased risk of explosion if desensitizing agent is reduced | Desensitized explosives — Category 4 | Warning |
| H224 | Extremely flammable liquid and vapor | Flammable liquids — Category 1 | Danger |
| H225 | Highly Flammable liquid and vapor | Flammable liquids — Category 2 | Danger |
| H226 | Flammable liquid and vapor | Flammable liquids — Category 3 | Warning |
| H250 | Catches fire spontaneously if exposed to air | Pyrophoric liquids — Category 1 Pyrophoric solids — Category 1 | Danger |
| H334 | May cause allergy or asthma symptoms or breathing difficulties if inhaled | Sensitization, respiratory — Category 1, 1A, 1B | Danger |
Chemicals using P233
37 chemicals in our database. Classification comes from each chemical's primary GHS source, so a supplier's SDS may differ.
P233 frequently asked questions
What does P233 mean?
P233 says: "Keep container tightly closed". It is a prevention precautionary statement in the Prevention (P200 series).
Which hazards call for P233?
In the GHS data, P233 is recommended for hazard statements H206, H207, H208, H224, H225, H226, H250, H334.
What type of statement is P233?
P233 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)