CLEAPSS Supporting practical science and technology
Welcome to the new CLEAPSS Science Website
CLEAPSS resources give teachers ideas for exciting and engaging practical activities that fire pupils' imaginations and then, unlike many other sources of ideas, go on to show teachers and technicians in detail how to translate the ideas into safe and exciting experiences in the classroom.
CLEAPSS advice and documentation is recognised by the Health and Safety Executive and the Department for Education.. (read more)
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CLEAPSS online training - Health & Safety for Science Technicians
This FREE unmediated self-study course consisting of 4 video presentations interspersed with DIY tasks.  

For further details please click here

After completing the course you may wish to sign up to our follow-on live online H&S course.
Updates to Guide L093
We are working hard to get the new edition of L093 and GL114 finalised and uploaded to our website as soon as possible.

A number of developments have occurred during the rewrite including, most recently, agreeing an interpretation of the transport regulations with ONR. 

We felt it would be unwise to upload a version, only for it to be superseded a few weeks later. 

We aim to have the latest version as soon after half term as possible.
CLEAPSS at the ASE Conference 2024
Thanks to everyone we met at the ASE Conference in Northampton.

You can also see a showcase video reel here.

You can find links to all our conference resources here.

Supply of chemicals - New Regulations

The regulations for supplying explosives precursors and poisons was updated on 27th September 2023 and came into force on 1st October. These put in place new requirements on the supply of certain chemicals which include the following commonly used in schools:

Explosives precursors: acetone, aluminium powders, hydrochloric acid, hydrogen peroxide, sulfur and sulfuric acid.

Poisons: ammonia, phenols, sodium hydroxide, sodium nitrite and sodium hypochlorite solutions. 

The regulations state that businesses and professional users should be verified by the supplier every time a new purchase is made of these regulated chemicals. 

 Where they are being supplied frequently or on a routine basis to the same professional user or business, verification should occur every 18 months or whenever there is a change or deviation from normal purchasing patterns. This is something suppliers can choose to do, but given schools don’t generally make frequent purchases of these chemicals, it is likely that the information will be required for each order.

The person making the sale (the supplier) must obtain the following from the business customer (i.e. the school):

<!--the business customer’s name and address. If the business customer is not an individual, the name of an individual who is authorised on behalf of the business customer should be recorded;

<!--a form of photographic identification of the business customer or, if the business customer is not an individual, of the individual making the purchase; this could be a school photo ID card

<!--a statement of the nature of the business customer’s trade, business or profession, or of the public function that the business customer performs; and the business customer’s VAT registration number, if the business customer has such a number

Your school will have to decide who is authorised on behalf of the business to make the purchase (the name on the order must match the individual). For schools it is most likely to be a technician, head of science or finance manager.

There is no licence which applies to these regulations, so there is nothing schools will need to apply for.

This information should be provided when requested by the company making the sale, there is no need to provide it in advance.

Further details including a list of the regulated substances and concentration thresholds can be found in the Explosives precursors and poisons: general guidance on the government website  

New edition of CLEAPSS guide GL016
We have just updated CLEAPSS Guide GL016 - Technical justification showing how L93 risk assessments meet the suitable and sufficient requirements of the Approved Code of Practice L121.

This revised version contains an additional table in Appendix 1 - that lists the dose rates at a range of distances for all the sources currently listed in L093.

The HSE have indicated that they will expect the RPS (schools) to have a copy this version and be aware of the dose rates for the sources in their school.

What's new.. more..

GL422 - How to open a flammable or corrosives cabinet
The most common chemical storage concerns are to do with storing flammable and corrosive liquids, including the potential for flammable and other harmful vapours and the risk of fire and being overcom.. more
 (16 Feb 2024)

GL416a - Optical staining templates
This guide contains filter templates to be used in conjunction with GL416 Optical staining in microscopy.
 (14 Feb 2024)

GL416 - Optical staining in microscopy
This guide outlines how to make and use filters in order to view specimens without the use of chemical stains
 (14 Feb 2024)

PP139 - The preparation of hydrated zinc sulfate crystals
Preparing salts is a common activity at GCSE level, bringing together many useful skills. Making copper sulfate crystals (PP027), which involves making copper(II) sulfate from copper(II) oxide, is the.. more
 (12 Feb 2024)

GL253 - Suppliers who are associate members of CLEAPSS
The individuals, companies and organisations listed in this document are associate members of CLEAPSS. They are permitted to display the CLEAPSS logo with the text “Associate Member of CLEAPSS” This m.. more
 (2 Feb 2024)