Cleaning professionals routinely work with products designed to remove grease, scale, dirt, bacteria and other contamination. Those products can make workplaces safer and more hygienic, but some can also harm the people using them if exposure is not properly controlled.

That is where the COSHH regulations become particularly important.

In Great Britain, the Control of Substances Hazardous to Health Regulations 2002, commonly known as COSHH, require employers to assess and control exposure to substances that can damage health. For cleaners, this can include disinfectants, descalers, bleach products, solvents, concentrated detergents and other hazardous cleaning chemicals.

COSHH regulations is not simply about wearing gloves or storing bottles in a cupboard. Effective compliance starts with identifying the hazard, understanding how workers could be exposed and selecting controls that prevent or reduce that exposure.

This guide explains the main requirements for cleaning professionals, supervisors and employers, including responsibilities, risk assessments, chemical handling, storage, personal protective equipment and common compliance mistakes.

Understanding COSHH Regulations

COSHH regulations stands for Control of Substances Hazardous to Health. Its purpose is to prevent or adequately control exposure to substances that can cause ill health through workplace activities. For cleaners, exposure can happen when chemicals splash onto the skin or eyes, vapours or aerosols are inhaled, or hands are repeatedly exposed to water and detergents. Biological contaminants may also be present in waste, bodily fluids or contaminated surfaces.

What counts as a hazardous substance?

Hazardous substances can include:

• chemicals and chemical products;
• fumes;
• vapours;
• mists;
• dusts;
• gases; and
• harmful biological agents.

Cleaning professionals commonly use liquids and sprays, but the way a substance is applied can affect exposure. Spraying, for example, may create a mist that increases the possibility of inhalation.

Not every cleaning product has the same risk

Some everyday cleaning products present relatively low risks when used correctly, while others may be corrosive, toxic or sensitising. Concentrated products can also present greater risks than properly diluted solutions. COSHH regulationsrequires the actual hazard and level of exposure to be considered.

Anyone researching hazardous substances UK requirements should also remember that COSHH regulations is not the only relevant legislation. Hazards such as asbestos and lead have separate legal requirements.

COSHH across the UK

In Great Britain — England, Scotland and Wales — the main regulations are the Control of Substances Hazardous to Health Regulations 2002, as amended. Northern Ireland has separate COSHH regulations and its own regulator, HSENI.

The principles are broadly similar, but businesses operating across different UK nations should follow the legislation relevant to each location. This is important when considering workplace cleaning laws, as there is no single law covering every aspect of cleaning work.

Why COSHH Matters in Cleaning

Professional cleaning often involves regular chemical use and repeated exposure. Even when a single exposure causes no obvious injury, repeated contact may contribute to longer-term health problems.

Skin damage and dermatitis

Cleaners frequently carry out wet work, with their hands repeatedly exposed to water, detergents and cleaning products. This can remove protective oils from the skin and contribute to irritant contact dermatitis.

Common symptoms include:

• dry skin;
• redness;
• itching;
• cracking; and
• soreness.

Some ingredients may also cause allergic reactions. Effective cleaning chemicals safety therefore means reducing unnecessary contact rather than assuming a familiar product is harmless.

Eye injuries

Corrosive or irritating chemicals can seriously damage the eyes. Splashes may happen when pouring concentrates, diluting products or dealing with spills. Risk assessments should determine whether safer dispensing methods or eye protection are necessary.

Respiratory effects

Some cleaning products can produce vapours, aerosols or mists. Certain substances may irritate the respiratory system or contribute to occupational asthma and sensitisation. Poor ventilation can increase exposure, so changing the product or method may sometimes be preferable to relying only on respiratory protective equipment.

Dangerous chemical reactions

Cleaning chemicals should never be mixed unless the manufacturer specifically permits it. In particular, bleach-containing products can react with other substances and produce dangerous gases. Cleaners should never assume that mixing products makes them more effective.

Biological hazards

COSHH regulations can also apply to harmful biological agents. This may be relevant when cleaners deal with contaminated waste, bodily fluids, toilets or areas where exposure to microorganisms is foreseeable. Appropriate hygiene, waste handling and protective measures can help reduce these risks.

Protecting other people

Cleaning chemicals can affect people besides the cleaner. Spraying a product in an occupied workplace may expose nearby employees, while an unlabelled container could be used incorrectly by someone else. Good health and safety cleaning practices therefore consider everyone who could reasonably be exposed.

Employer Responsibilities Under COSHH

The main responsibility for controlling occupational exposure rests with the employer. Providing gloves and keeping safety data sheets is not enough; employers need an effective system for managing hazardous substances.

Identify hazardous substances

Employers should know which substances are used or generated during work. A cleaning company should maintain an organised inventory of relevant products and use labels and safety data sheets to understand their hazards.

Assess the risk

Employers must assess the health risks associated with hazardous substances. For cleaning work, this can include considering:

• which product is used;
• how much and how concentrated it is;
• how it is applied;
• how frequently it is used;
• how long exposure lasts;
• who could be exposed;
• routes of exposure;
• storage and disposal; and
• foreseeable spills or emergencies.

A generic assessment may provide useful guidance, but it should reflect the actual cleaning task, products and working environment.

Prevent exposure where possible

COSHH regulations places prevention ahead of control.

Employers should first consider whether the hazardous product or process is actually necessary.

Could the same job be completed with a less hazardous product?

Could a spray be replaced with another application method that produces less airborne mist?

Could the product arrive pre-diluted rather than requiring employees to handle concentrate?

These questions follow the principle of controlling risk at source.

Adequately control remaining exposure

Where exposure cannot reasonably be prevented, appropriate control measures are required.

Depending on the task, these could include:

• safer working procedures;
• dispensing systems;
• ventilation;
• limiting access;
• equipment that prevents direct contact;
• spill-control arrangements; and
• suitable PPE.

Several controls may be needed together.

Maintain control measures

A control measure is useful only if it continues to work.

Dispensers, ventilation, protective equipment and safe working procedures should therefore be maintained and checked where appropriate.

If workers stop following the method because it is impractical, management needs to investigate why rather than assuming the written procedure is still controlling the risk.

Provide information, instruction and training

Employees need to know what they are working with.

Appropriate training should explain:

• the hazards;
• how exposure can occur;
• required control measures;
• safe dilution and application;
• PPE requirements;
• hygiene arrangements;
• spill procedures; and
• what to do in an emergency.

People searching for COSHH training UK courses should understand an important distinction: the law requires employers to ensure workers receive suitable information, instruction and training, but it does not mean every cleaner must purchase one particular commercial COSHH regulations certificate.

Training needs to reflect the actual substances and tasks in the workplace.

Consider contractors

Where cleaning is outsourced, both the client organisation and cleaning contractor may need to exchange relevant information.

A contractor bringing hazardous chemicals onto a client’s premises needs to understand local risks, while the client needs to understand how the contractor’s work could affect its own staff and visitors.

Clear coordination forms an important part of cleaning compliance.

Employee Responsibilities

Employers carry the main responsibility for creating safe systems, but employees also have an important role.

A risk assessment provides little protection if staff deliberately ignore its controls.

Follow the agreed procedure

Employees should use cleaning products according to their training and workplace instructions.

This can include:

• using correct dilution ratios;
• using approved dispensing systems;
• avoiding prohibited mixtures;
• keeping lids closed;
• following ventilation requirements; and
• using designated equipment.

Improvisation can create hazards.

For example, using a stronger-than-approved concentration does not automatically clean better and may increase chemical exposure.

Use control measures correctly

Where control equipment or PPE has been provided, workers should use it correctly.

That means wearing the required gloves or eye protection, using extraction where relevant and following hygiene procedures.

HSE also expects workers to alert supervisors if a control measure appears faulty.

Report spills, symptoms and defects

Workers should report problems rather than working around them.

This can include:

• leaking containers;
• damaged PPE;
• defective dispensers;
• unusual fumes;
• repeated skin irritation;
• breathing difficulties;
• accidental mixing; and
• significant spills.

Early reporting allows corrective action before a small problem becomes serious.

Protect colleagues and others

Employees should not leave hazardous chemicals unsecured, remove warning labels or transfer products casually into drink bottles or other unsuitable containers.

They should also follow rules designed to protect colleagues, customers and members of the public.

Cooperate with training and supervision

Workers should participate in required safety instruction and apply what they have learned.

Where they do not understand a label, procedure or assessment, asking for clarification is safer than guessing.

COSHH Risk Assessments Explained

A COSHH regulations risk assessment examines how hazardous substances could affect health during the actual work being undertaken.

It is different from simply making a list of chemical products.

Hazard and risk are not identical

A hazard is something capable of causing harm.

Risk concerns the likelihood and potential seriousness of that harm in the circumstances in which the substance is being used.

A corrosive chemical may have significant hazardous properties. If it remains in a sealed container and nobody is exposed, the immediate risk may be low.

If an employee manually pours the concentrate several times a day in an area where splashes are likely, the risk changes.

Step 1: Identify the substances

Review:

• product labels;
• safety data sheets;
• manufacturer instructions;
• substances generated by work; and
• biological exposure where relevant.

Do not assume that the absence of a dramatic warning label means no COSHH regulations consideration is necessary.

Step 2: Understand how exposure occurs

Consider whether the substance can:

• touch the skin;
• enter the eyes;
• be inhaled;
• be swallowed accidentally; or
• enter through another relevant exposure route.

The method of cleaning is important.

Spraying may create more airborne exposure than wiping with a prepared solution.

Step 3: Identify who might be exposed

The assessment should consider more than the main cleaner.

Potentially exposed people may include:

• other cleaning employees;
• supervisors;
• maintenance workers;
• contractors;
• office employees;
• customers;
• visitors; and
• members of the public.

Particular individual circumstances may also require additional consideration under wider health and safety duties.

Step 4: Evaluate Existing Controls

Ask what currently prevents exposure. Does the product have a dosing system? Are gloves suitable for the chemical? Is ventilation sufficient? Are workers trained? Is eye protection needed during dilution? Can employees access safety data sheets? These checks help ensure that existing controls are genuinely effective.

Step 5: Decide What More Is Required

If exposure is not adequately controlled, improve the system. A safer chemical or process should normally be considered before relying solely on PPE. This is a key part of effective housekeeping regulations and chemical safety.

Step 6: Record Significant Findings

For employers with five or more employees, COSHH risk-assessment findings need to be recorded. Smaller businesses can also benefit from written records because they provide consistency and evidence of the precautions selected.

Step 7: Review the Assessment

COSHH assessments should be kept up to date and reviewed when necessary rather than simply rewritten on an arbitrary annual date. Triggers can include:

• a new chemical;
• a changed formulation;
• different equipment;
• a new cleaning method;
• failing controls;
• an accident or near miss;
• reported health problems; or
• significant workplace changes.

Periodic review is also good practice. The purpose is to confirm that the assessment remains suitable.

Safe Chemical Handling and Storage

Good chemical control continues from the moment a product arrives until it is finally disposed of.

Read Labels and Safety Information

Employees should understand the manufacturer’s instructions before using a chemical. Labels may contain hazard pictograms, warnings, dilution information and precautions. Safety data sheets provide more detailed information on hazards, handling, storage and emergency response. However, an SDS supports the COSHH regulationsassessment; it does not replace it.

Use the Correct Dilution

More concentrate is not necessarily better. Using stronger solutions than instructed may:

• increase exposure;
• damage surfaces;
• increase fumes;
• create unnecessary waste; and
• make the safe working method ineffective.

Controlled dispensing systems can reduce manual contact with concentrate where appropriate.

Never Mix Chemicals Casually

Cleaners should only mix substances when product instructions and workplace procedures specifically require it. Bleach-containing products should never be casually mixed with other chemicals because dangerous gases may be released.

Keep Chemicals Labelled

Hazardous products should remain in suitable, correctly labelled containers. Transferring chemicals into unmarked spray bottles, drinking-water bottles or food containers creates unnecessary risks. Any authorised secondary containers should be suitable and labelled appropriately.

Separate Incompatible Substances

Storage should consider chemical compatibility. Products that could react dangerously should not simply be stored together because they are all cleaning chemicals safety products. Safety data sheets and supplier instructions can help determine suitable storage arrangements.

Restrict Access Where Necessary

Chemical stores should be arranged so unauthorised people cannot casually access hazardous products. The appropriate security level depends on the workplace and the chemicals involved.

Plan for Spills

Cleaning teams should know:

• who to inform;
• whether an area should be isolated;
• what spill equipment is appropriate;
• what PPE is required;
• how contaminated materials should be handled; and
• when emergency assistance is necessary.

Workers should never attempt to manage a hazardous spill beyond their training and available equipment. For anyone researching broad housekeeping regulations, COSHH is one important part of workplace safety alongside slips, manual handling, equipment use and other hazards.

Personal Protective Equipment (PPE)

PPE can be important for cleaning chemicals safety work, but it should not automatically be the first or only control. COSHH regulations aims to prevent or control exposure at source where reasonably practicable.

PPE Is a Final Layer of Protection

If a harmful chemical can reasonably be replaced with a safer product, this may be preferable to relying entirely on gloves. Similarly, an enclosed dosing system may provide better control than repeatedly pouring corrosive concentrate manually. PPE is particularly useful for residual risks that remain after stronger controls have been considered.

Common PPE for Cleaners

Depending on the assessment, cleaning PPE may include:

• protective gloves;
• chemical-resistant aprons;
• protective clothing;
• eye or face protection;
• suitable footwear; and
• respiratory protective equipment where genuinely required.

There is no universal PPE cleaning kit suitable for every chemical. Protection must match the actual hazard.

Gloves Must Be Suitable

Simply stating “wear gloves” in a COSHH assessment may not be enough. Different glove materials provide different levels of chemical resistance. Selection should consider the substance, concentration, contact time and manufacturer’s information. Gloves should also fit properly and be replaced when damaged or contaminated.

Eye Protection

Where there is a meaningful splash risk, suitable eye or face protection may be required. This can include handling concentrates, decanting chemicals or dealing with certain spillages. The COSHH regulations assessment should determine the appropriate protection.

Respiratory Protection

Respiratory protective equipment should not be used casually as a substitute for better controls. Where RPE is necessary, it should match the contaminant and working conditions. Some tight-fitting respirators also require suitable face-fit arrangements. For routine cleaning, changing the chemical or method and improving ventilation may sometimes provide better control.

PPE still needs training

Workers need to know:

• when PPE must be used;
• how to put it on;
• how to remove it safely;
• its limitations;
• how to clean or dispose of it;
• where it should be stored; and
• how to report damage.

Providing a box of gloves without explanation is not an effective protective system.

Common COSHH Compliance Mistakes

Many failures occur not because the organisation has never heard of COSHH, but because its compliance system is superficial.

Mistake 1: Treating the safety data sheet as the assessment

An SDS describes a product’s hazards and provides safety information.

It does not analyse how a particular cleaner uses that substance in a particular workplace.

Employers must still assess the actual task.

Mistake 2: Copying generic assessments

Templates can save time, but they should be adapted.

A risk assessment for manually diluting concentrate may not suit an organisation using closed automatic dosing.

The document should reflect reality.

Mistake 3: Assessing the chemical but not the task

Risk changes with the working method.

Spraying, wiping, soaking, decanting and machine application can produce different exposures even when the same chemical is used.

Mistake 4: Using PPE as the only control

Gloves and goggles can be essential, but COSHH regulations expects employers to consider whether exposure can first be prevented or reduced through safer substances and processes.

Mistake 5: Mixing products

Combining cleaning chemicals safety products without an approved procedure can produce unpredictable and dangerous reactions.

Staff should be specifically trained not to improvise chemical mixtures.

Mistake 6: Poor storage

Unlabelled containers, leaking bottles, incompatible chemicals stored together or easy public access all undermine an otherwise reasonable COSHH system.

Mistake 7: Ignoring wet work

Not all cleaning-related health problems come from obviously hazardous chemicals.

Frequent hand washing, prolonged glove use and repeated contact with water and detergents can contribute to skin problems.

Hand-care arrangements can therefore be part of appropriate control.

Mistake 8: Training once and forgetting

A brief induction several years ago is unlikely to be enough if products, equipment or procedures have changed.

Information and instruction need to remain relevant to the current work.

Mistake 9: Never reviewing assessments

A COSHH regulations folder can look impressive while containing outdated chemicals and obsolete procedures.

Assessments should be reviewed when circumstances change and kept current.

Mistake 10: Assuming cleaners alone are exposed

Customers, office workers, contractors and other people can encounter chemical mists, spills or improperly stored products.

A suitable assessment considers everyone who may be affected.

For organisations seeking better cleaning compliance, avoiding these mistakes is often more valuable than producing increasingly complicated paperwork.

Key Takeaways

The COSHH regulations require more than warning labels and gloves.

Cleaning employers need to identify hazardous substances, assess the real exposure created by each task, prevent exposure where reasonably practicable and use appropriate controls where it cannot be prevented.

Cleaning chemicals may cause dermatitis, eye injury, respiratory problems or other health effects if used incorrectly. Safe systems therefore need to cover application, dilution, ventilation, storage, spills, training and PPE.

Employees also have an important role. They should follow procedures, use controls correctly and report defects, spills or health concerns.

Effective cleaning chemicals safety is based on the hierarchy of control. A safer product, safer process or controlled dispensing system may offer better protection than relying on PPE alone.

Finally, organisations should treat COSHH regulations as a continuing process rather than a one-off form. Chemicals, workers and working methods change, and the assessment needs to remain suitable for what is actually happening.

FAQ

What does COSHH stand for?

COSHH stands for Control of Substances Hazardous to Health.

In Great Britain, the principal legislation is the Control of Substances Hazardous to Health Regulations 2002, as amended.

Northern Ireland has separate Control of Substances Hazardous to Health Regulations (Northern Ireland) 2003.

Who must comply with COSHH regulations?

Employers whose work involves substances hazardous to health have duties under COSHH.

HSE guidance also confirms that COSHH regulations can apply to self-employed people working with hazardous substances, including circumstances where substances are taken onto other people’s premises.

Employees must cooperate with workplace controls by using equipment and PPE properly, following procedures and reporting problems.

What is a COSHH risk assessment?

ACOSHH regulations risk assessment examines how hazardous substances could harm people during a particular work activity.

It considers the substance, exposure routes, amount and frequency of use, people affected, existing controls and any additional measures required.

A manufacturer’s safety data sheet is an important source of information but is not itself the risk assessment.

Which cleaning chemicals are covered?

COSHH may apply to cleaning chemicals safety that are hazardous to health, including certain disinfectants, bleach products, descalers, concentrated detergents, solvents, corrosive cleaners and other hazardous formulations.

The assessment should also consider biological agents and other harmful substances encountered during cleaning.

Not every cleaning chemicals safety product necessarily presents the same level of COSHH regulations risk.

What PPE is required?

There is no single PPE requirement for all cleaning work.

The risk assessment determines what is needed.

Depending on the substance and task, appropriate PPE could include chemical-resistant gloves, aprons, protective clothing, eye protection or respiratory protection.

PPE should be suitable for the specific hazard and used alongside other control measures rather than automatically replacing them.

How should hazardous chemicals be stored?

Hazardous cleaning chemicals safety should be stored in suitable, correctly labelled containers in accordance with manufacturer and safety-data-sheet information.

Incompatible substances should be separated where necessary, access should be appropriately controlled, and products should not be transferred casually into unlabelled bottles or food-and-drink containers.

Spill and emergency arrangements should also be considered.

What happens if COSHH regulations rules are ignored?

Failure to control hazardous substances can expose workers and others to dermatitis, respiratory disease, burns, eye injuries and other health problems.

It can also lead to enforcement action by HSE in Great Britain or HSENI in Northern Ireland.

Depending on the seriousness of the breach, enforcement can include advice, notices and prosecution.

Poor compliance may also create operational disruption, sickness absence and reputational damage.

How often should COSHH assessments be reviewed?

COSHH does not require every assessment to be replaced according to one universal annual timetable.

Assessments must be kept up to date.

A review is appropriate when there are reasons to believe the assessment is no longer valid or when significant changes occur, such as a new product, changed procedure, new equipment, an incident, reported symptoms or evidence that existing controls are ineffective.

Organisations may also use scheduled periodic reviews as part of their management system.

Conclusion

For cleaning businesses and facilities teams, the COSHH regulations provide the central framework for controlling health risks created by hazardous substances.

Good compliance begins before the cleaner puts on gloves. Employers should consider whether a hazardous product is needed at all, whether a safer alternative exists and whether the working method can minimise exposure. Remaining risks can then be controlled through procedures, equipment, ventilation, appropriate PPE and effective training.

Anyone exploring COSHH training UK, workplace cleaning laws, hazardous substances UK, PPE cleaning, housekeeping regulations or wider health and safety cleaning requirements should therefore avoid treating COSHH as a simple checklist. Safe cleaning depends on understanding the actual chemical, task, worker and workplace.

For Skills Pack learners, studying COSHH regulations can provide useful knowledge of hazard identification, risk assessment and workplace controls. However, training should complement rather than replace an employer’s own suitable assessment, workplace instruction, supervision and practical competence arrangements.