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A practical guide for purchasing, storing, handling, using, managing and disposing of chemicals safely.
Chemicals are essential in science education, laboratories and technical environments, but many substances can be hazardous if they are purchased, stored, handled, mixed or disposed of incorrectly.
This guide explains key chemical safety principles, COSHH awareness, Safety Data Sheets, hazard symbols, responsible purchasing, storage, segregation, handling, inventory management, disposal and emergency actions for schools, colleges and laboratory users.
This guide was written and reviewed by Better Equipped's technical team, drawing on experience supplying school chemicals, laboratory safety equipment, COSHH cabinets, glassware, PPE and practical science resources to schools, colleges and laboratories throughout the UK.
Chemicals must only be purchased, stored, handled and disposed of by competent, authorised people following current legislation, Safety Data Sheets, risk assessments and local procedures.
This guide is for general educational guidance only. It does not replace a COSHH assessment, Safety Data Sheet, employer policy, school procedure, CLEAPSS guidance, waste contractor instruction or professional safety advice.
When purchasing, storing, using or disposing of chemicals in the UK, organisations should work within all relevant legislation, official guidance, school policies and site-specific risk assessments.
| Area | Relevant Legislation / Guidance | Why It Matters |
|---|---|---|
| Health risks from substances | COSHH: Control of Substances Hazardous to Health Regulations 2002 | Requires suitable assessment and control of exposure to hazardous substances. |
| Classification and labelling | CLP: Classification, Labelling and Packaging regulations | Controls hazard classification, pictograms, labels and packaging information. |
| Chemical supply and registration | UK REACH | Applies to the registration, evaluation, authorisation and restriction of chemicals. |
| Flammable and explosive risks | DSEAR: Dangerous Substances and Explosive Atmospheres Regulations 2002 | Applies where substances could create fire, explosion or similar energetic risks. |
| Hazardous waste | Hazardous waste regulations and official waste guidance | Controls safe classification, storage, collection, transport and disposal of hazardous waste. |
| General workplace safety | Health and Safety at Work etc. Act 1974 | Sets wider duties for employers, employees and organisations. |


Chemicals may present several different hazards. Some can burn skin, irritate eyes, catch fire, harm the environment, release harmful vapours or react dangerously with other substances. Always check the label, hazard pictograms, hazard statements, precautionary statements and Safety Data Sheet.
Can ignite easily and may require specialist storage away from heat, sparks, flames and oxidisers.
Can cause severe burns and damage to eyes, skin, metals or surfaces.
Can cause serious harm if inhaled, swallowed or absorbed through the skin.
Can harm aquatic life, soil or wider ecosystems if released incorrectly.
Can intensify fire and must be stored away from flammable substances and organic materials.
Can cause skin, eye or respiratory irritation and may require strict exposure controls.
Hazard symbols help users quickly identify the main risks associated with a chemical. They should be used alongside the full label, SDS and COSHH assessment rather than used alone.

| Hazard Type | Meaning | Storage / Handling Consideration |
|---|---|---|
| Flammable | Can ignite easily from heat, sparks, flame or static. | Store away from ignition sources and incompatible substances. |
| Corrosive | Can cause burns and damage metals or surfaces. | Use compatible storage, suitable PPE and spill containment. |
| Toxic / Acute Toxicity | Can cause serious harm or death through exposure. | Restrict access and follow SDS handling and PPE requirements. |
| Health Hazard | May cause long-term health effects. | Minimise exposure and use specified controls. |
| Oxidising | Can intensify fire or cause other materials to burn more strongly. | Keep away from flammables, reducing agents and organic materials. |
| Environmental Hazard | Can harm aquatic life or the environment. | Prevent leaks, spills and drain disposal unless approved. |
A Safety Data Sheet, often called an SDS, provides essential information about hazards, handling, storage, exposure controls, first aid, fire response, spill response, transport and disposal.

| SDS Section | What It Helps You Understand | Why It Matters |
|---|---|---|
| Section 2: Hazards Identification | Main hazards, pictograms, signal words and precautionary statements. | Helps identify the level and type of risk. |
| Section 4: First Aid Measures | What to do after skin contact, eye contact, inhalation or ingestion. | Important for emergency planning and first aid response. |
| Section 5: Firefighting Measures | Suitable extinguishing media and fire-specific hazards. | Helps plan fire response and storage precautions. |
| Section 6: Accidental Release Measures | Spill response, containment and clean-up advice. | Important for spill kit selection and emergency action. |
| Section 7: Handling and Storage | Safe handling procedures and storage requirements. | One of the most important sections before storing or using a chemical. |
| Section 8: Exposure Controls / PPE | Ventilation, gloves, eye protection and exposure limits. | Helps identify PPE and control measures. |
| Section 10: Stability and Reactivity | Incompatible materials and conditions to avoid. | Essential for chemical segregation. |
| Section 13: Disposal Considerations | Waste handling and disposal guidance. | Helps plan safe disposal and waste segregation. |
A COSHH assessment helps identify how a hazardous substance could harm people and what controls are needed to reduce that risk. It should consider the chemical, the task, the quantity used, who may be exposed, how exposure could happen and what control measures are required.
| COSHH Assessment Area | What to Consider |
|---|---|
| Substance hazards | Hazard symbols, SDS information, concentration, form and route of exposure. |
| Task and quantity | How much is used, how often, by whom and for how long. |
| Exposure route | Inhalation, skin contact, eye contact, ingestion, injection or accidental release. |
| Control measures | Substitution, ventilation, fume cupboard, PPE, supervision, training and safe procedure. |
| Storage and disposal | Compatibility, cabinet type, labelling, inventory and waste route. |
| Emergency arrangements | Spill response, first aid, eyewash, fire response and reporting procedures. |
Chemicals should only be purchased when there is a clear educational, laboratory or operational need and when suitable controls are already in place.

Chemical safety starts before a bottle reaches the shelf. Every delivery should be checked, logged and stored correctly as soon as possible.

Chemical segregation means keeping incompatible substances apart to prevent dangerous reactions, fires, toxic gas release, contamination or uncontrolled heat generation.

| Chemicals to Separate | Reason | Storage Action |
|---|---|---|
| Acids and alkalis | Can react strongly and release heat. | Store separately unless a competent risk assessment confirms otherwise. |
| Oxidisers and flammables | Oxidisers can intensify fires. | Keep oxidisers away from flammables and organic materials. |
| Acids and cyanides | Can produce highly toxic gases. | Store separately and follow strict site procedures. |
| Water-reactive chemicals and water sources | Can react violently with moisture or water. | Keep dry and store according to SDS requirements. |
| Incompatible chemical wastes | Mixing wastes can cause heat, pressure, gas release or fire. | Segregate waste streams and label waste containers clearly. |
Do not eat or drink near chemicals, mix chemicals without authorisation, smell chemicals directly, use damaged containers or leave hazardous substances unattended.

A good inventory helps reduce risk, avoid overstocking, locate chemicals quickly and identify chemicals that need replacing or disposing of.

| Inventory Field | Why It Helps |
|---|---|
| Chemical name and concentration | Helps identify the exact substance and avoid confusion. |
| Quantity and container size | Supports stock control and reduces over-ordering. |
| Storage location | Helps users find and return substances safely. |
| Hazard classification | Supports segregation and cabinet selection. |
| Date received and expiry date | Helps identify old, expired or deteriorating chemicals. |
| SDS location | Ensures users can access safety information quickly. |
| Disposal record | Provides evidence that unwanted stock has been removed through the correct route. |
Chemical disposal must follow the SDS, local procedures, hazardous waste requirements and the instructions of your organisation or licensed waste contractor.

| Waste Type | Typical Consideration |
|---|---|
| Acids and alkalis | May require controlled neutralisation or specialist disposal depending on local procedures. |
| Solvents | Usually require segregated collection and hazardous waste disposal. |
| Heavy metal solutions | Require specialist disposal and must not enter general drains. |
| Oxidisers | Must be kept separate from incompatible waste streams. |
| Contaminated PPE or absorbents | May need to be treated as hazardous waste depending on contamination. |
| Unknown chemicals | Should be isolated and assessed by a competent person before disposal. |
Using the correct supporting equipment helps improve safety, storage, spill response, handling and compliance.
Chemicals and reagents for education, practical science and laboratory use.
View ChemicalsLockable hazardous substance storage cabinets for safer chemical organisation.
View COSHH CabinetsEssential eye protection for chemical handling, preparation and practical science.
View GogglesHelp protect hands when handling suitable chemicals, containers or spill residues.
View GlovesSupport fast response to suitable chemical spills, leaks and accidental releases.
View Spill KitsUseful for identifying containers, storage areas, cabinets and hazards.
View Signs
| Mistake | Why It Matters | How to Avoid It |
|---|---|---|
| No SDS review | Can lead to incorrect handling, PPE, storage or disposal. | Review the SDS before purchase, use, storage and disposal. |
| Poor labelling | Unlabelled containers create serious identification and disposal risks. | Keep original labels readable and label prepared solutions clearly. |
| Incorrect storage | Incompatible substances can react dangerously if stored together. | Store by compatibility group and use the correct cabinet. |
| Damaged containers | Leaks, corrosion and poor closures can expose users and damage storage areas. | Inspect containers regularly and remove damaged items safely. |
| Unsafe disposal | Incorrect disposal can harm people, property and the environment. | Follow SDS, local procedure and approved waste routes. |
| Overstocking | Creates storage, expiry and disposal problems. | Buy the smallest practical quantity and review inventory regularly. |
| Problem | Possible Cause | What to Do |
|---|---|---|
| Container label is unreadable | Age, chemical damage, poor storage or transfer to an unsuitable container. | Do not use the substance. Isolate and follow your identification procedure. |
| Strong smell from storage area | Leaking container, poor closure, residue or unsuitable storage. | Keep people away, report it and follow the site procedure. |
| Cabinet is overcrowded | Over-ordering, poor stock control or expired chemicals not removed. | Review inventory and remove unnecessary stock through approved routes. |
| Chemical has expired | Stock has not been rotated or reviewed. | Do not use unless authorised. Arrange disposal or review by a competent person. |
| Spill kit is missing or incomplete | Poor inspection or items used and not replaced. | Replace missing items before continuing chemical work. |
| Users are unsure what PPE to wear | SDS or COSHH assessment has not been checked or communicated. | Stop the task and review the SDS, COSHH assessment and procedure. |

Remove contaminated clothing if safe to do so. Rinse affected skin with water and follow SDS first aid advice.
Use an eyewash station immediately and continue rinsing as directed by local procedure. Seek urgent medical advice.
Move to fresh air if safe. Seek medical advice if symptoms occur or exposure is significant.
Follow SDS guidance and seek immediate medical assistance. Do not induce vomiting unless instructed by medical professionals.
Stop work, alert others, isolate the area and follow the spill response procedure.
Raise the alarm, evacuate if necessary and only use extinguishers if trained and it is safe to do so.
| Stage | Checks |
|---|---|
| Purchase | Check need, restrictions, SDS, storage, competence and disposal route. |
| Before Use | Read SDS, complete COSHH assessment, wear PPE and prepare spill controls. |
| During Use | Use minimum quantity, avoid exposure, keep containers closed and follow procedure. |
| Storage | Label clearly, segregate, secure, inspect and maintain inventory records. |
| Disposal | Follow SDS, segregate waste, label waste containers and use approved routes. |
Chemical safety means identifying chemical hazards and using appropriate controls for purchase, storage, handling, use, emergency response and disposal.
A Safety Data Sheet is a document that provides information about a chemical’s hazards, safe handling, storage, exposure controls, emergency measures and disposal guidance.
COSHH stands for Control of Substances Hazardous to Health. It is a UK framework for assessing and controlling risks from hazardous substances.
Alphabetical storage alone is not safe because incompatible chemicals may be placed next to each other. Chemicals should be stored by compatibility and hazard type.
Do not use it. Isolate it safely and follow your organisation’s identification and disposal procedure.
Only if your approved procedure specifically allows it. Many chemicals require specialist disposal and must not enter drains.
Chemical inventories and storage areas should be reviewed regularly, with particular attention to expiry dates, container condition, labels and unnecessary stock.
Common equipment includes COSHH cabinets, spill kits, safety goggles, gloves, lab coats, labels, storage trays, glassware and appropriate waste containers.
Choosing suitable chemicals and safety equipment helps support practical science while reducing storage, handling and disposal risks. Better Equipped supplies school chemicals, COSHH cabinets, PPE, spill kits, laboratory glassware and science safety equipment for schools, colleges and laboratories throughout the UK.
View School Chemicals View Chemical Buying Guide Contact Us for AdviceThis guide was written and reviewed by Better Equipped's technical team, drawing on experience supplying chemicals, laboratory safety equipment, COSHH cabinets, PPE and practical science resources to schools, colleges, universities and laboratories throughout the UK.
Our aim is to help schools, technicians, teachers and laboratory users approach chemical purchasing, storage, handling and disposal more safely and responsibly.
Last reviewed and updated: June 2026
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