GHS precautionary statement
P420: Store separately
- P420
- Storage
P420 says: “Store separately”. It is a storage statement. P400 series: how and where to store the product, such as keeping it cool, dry, locked up or in a well-ventilated place.
About the storage group
P400 series: how and where to store the product, such as keeping it cool, dry, locked up or in a well-ventilated place. See all precautionary statements for the full list.
Hazards that call for P420
The GHS data recommends P420 for these hazard statements.
| Code | Statement | Hazard class and category | Signal word |
|---|---|---|---|
| H240 | Heating may cause an explosion | Self-reactive substances and mixtures; Organic peroxides — Type A | Danger |
| H241 | Heating may cause a fire or explosion | Self-reactive substances and mixtures; Organic peroxides — Type B | Danger |
| H242 | Heating may cause a fire | Self-reactive substances and mixtures; Organic peroxides — Type C, D Self-reactive substances and mixtures; Organic peroxides — Type E, F | Danger |
| H251 | Self-heating; may catch fire | Self-heating substances and mixtures — Category 1 | Danger |
| H252 | Self-heating in large quantities; may catch fire | Self-heating substances and mixtures — Category 2 | Warning |
| H271 | May cause fire or explosion; strong Oxidizer | Oxidizing liquids; Oxidizing solids — Category 1 | Danger |
Chemicals using P420
2 chemicals in our database. Classification comes from each chemical's primary GHS source, so a supplier's SDS may differ.
P420 frequently asked questions
What does P420 mean?
P420 says: "Store separately". It is a storage precautionary statement in the Storage (P400 series).
Which hazards call for P420?
In the GHS data, P420 is recommended for hazard statements H240, H241, H242, H251, H252, H271.
What type of statement is P420?
P420 is in the Storage (P400 series). P400 series: how and where to store the product, such as keeping it cool, dry, locked up or in a well-ventilated place.
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)