Chemical Storage Rules: 7 Golden Rules

A significant share of laboratory accidents results from incompatible chemicals being stored side by side. Proper storage discipline both reduces the risk of fire and explosion and preserves the shelf life of the chemicals.

1. Separate by Compatibility Group

Acids, bases, oxidizers and flammable solvents must be kept in separate cabinets, or at least on separate shelves with a physical barrier between them. For example, nitric acid stored next to organic solvents creates a serious fire risk.

2. Arrange by Chemical Family, Not Alphabetically

Alphabetical ordering by name alone can create dangerous combinations (for example, acetic acid could end up next to ammonium nitrate). Storage should always follow a chemical compatibility chart.

3. Keep Flammables in a Fire-Resistant Cabinet

Solvents should be kept in dedicated fire-resistant chemical storage cabinets, away from heat sources.

4. Never Place Heavy Containers Above Eye Level

Large-volume bottles should be stored on the lower shelves, below eye level, to reduce the risk of falling and of eye or face injury when lifting.

5. Keep Labeling Always Up to Date

Every container must clearly show the chemical name, hazard pictogram, date received and expiry date.

6. Keep Cold-Chain Items Separate

Chemicals that must be refrigerated must NEVER be kept in the same refrigerator as food; a separate refrigerator should be used for chemical purposes.

7. Carry Out Regular Inventory Checks

Chemicals that have passed their expiry date or have changed in colour or consistency should be reviewed regularly and disposed of properly.