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Certain chemicals can be used to manufacture explosives illegally or to cause harm.

Members of the public who want to import, acquire, possess or use these chemicals must have:

• a valid explosives precursors and poisons (EPP) licence issued by the Home Office
• an associated photographic identity document

You must report any suspicious transactions or attempted transactions (business to consumer and business to business) of regulated or reportable substances.

You must report any significant disappearances or thefts of regulated substances and reportable substances within 24 hours to your local police force using 101 (or 999 in an emergency). Include a reference to the Poisons Act in your report and say whether it is a regulated or reportable explosive precursor or poison.

If you find regulated substances on your property, you should arrange for disposal as soon as possible.

Regulated substances

Members of the public must provide a valid EPP licence and associated photo ID if they wish to buy or receive any regulated substances above the specified concentration limit. 

Regulated explosives precursors

Concentration thresholds for regulated explosives precursors are listed alongside where appropriate:

• ammonium nitrate: 16% N
• hexamine: regulated at any concentration
• hydrochloric acid: 10% w/w
• hydrogen peroxide:12% w/w
• nitromethane: 30% w/w
• nitric acid: 3% w/w
• potassium chlorate: 40% w/w
• phosphoric acid: 30% w/w
• potassium perchlorate: 40% w/w
• sodium chlorate: 40% w/w
• sodium perchlorate: 40% w/w
• sulphuric acid: 15% w/w

Regulated poisons

Poisons are regulated at any concentration except where stated:

• aluminium phosphide
• aluminium sulfide
• sodium sulfide
• calcium sulfide
• magnesium sulfide
• arsenic compounds
• barium salts (other than barium sulphate, barium carbonate and barium silicofluoride)
• bromomethane
• chloropicrin
• fluoroacetic acid, its salts and fluoroacetamide
• hydrogen cyanide and metal cyanides (other than ferrocyanides and ferricyanides)
• lead acetates and compounds of lead with acids from fixed oils
• magnesium phosphide
• mercury compounds
• oxalic acid- 10% w/w
• phenols (phenol; phenolic isomers of cresols, xylenols, monoethylphenols); compounds of phenols with a metal; 60% w/w of phenols or, for compounds of phenols with a metal, the equivalent of 60% w/w of phenols
• phosphorus yellow
• strychnine and its salts and its quaternary compounds
• thallium and its salts
• zinc phosphide
• calcium phosphide
• 2,4- Dinitrophenol and derivatives including sodium dinitrophenolate

Criminal offences

 Importing, acquiring, possessing and using

It is an offence for a member of the public to import, acquire, possess or use any of the substances without holding a valid EPP licence issued by the Home Office.

If found guilty of this offence, there is a maximum penalty of 2 years’ imprisonment, a fine, or both.

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It is an offence to supply any regulated substances to a member of the public if they do not hold a valid EPP licence issued by the Home Office. The maximum penalty is 2 years’ imprisonment, a fine, or both.

If you are supplying a member of the public with any regulated substances, please see the guidance for suppliers for more information.

Application process

The licence application process will take you through a series of questions to check whether you need to apply for an EPP licence. It will prompt you to have all the necessary documents to hand, such as proof of identity and address.

On receipt of your application and payment, the Home Office will conduct checks into your suitability, including criminal record and health checks.

Offences that might be considered relevant to these checks are listed in due diligence checks.

Once a decision on your application has been reached, the Home Office will write to you. If accepted, a licence will be posted to you separately.

Applications are considered on a case by case basis. We generally do not grant licences where there are safer alternatives that would produce the same effect as the substance you are requesting. This includes substances for unblocking pipes or most other cleaning purposes. Unless there are exceptional circumstances, your application will likely be refused and you will not receive a refund.

Remember to check the .

Fees

Licence type	Cost
New	£39.50
Amend	Free
Replace (lost, stolen or damaged)	£25.00
Renew	£39.50

You will need a credit or debit card to pay for your licence. The licence processing fee payment is processed by Worldpay on behalf of the Home Office.

All costs are non-refundable as fees reflect the processing and administration of licences.

The EPP licence will be valid for a maximum of 3 years. If the identity documentation provided during the application process is valid for a period of less than 3 years from the date the licence is granted, you will need to re-apply for a licence once the documentation has expired.

Licence fees cannot be changed without parliamentary scrutiny.

 Apply for a licence

Read the .

Make sure your application is correctly countersigned.

You can also amend, replace or renew your licence using this service.

Northern Ireland

EPP licences issued by the Home Office are not recognised in Northern Ireland. This change came into effect from 1 January 2021. You cannot use an EPP licence issued by the Home Office to import, acquire, possess or use explosives precursors in Northern Ireland.

If you do wish to import, acquire, possess or use explosives precursors in Northern Ireland, you need to apply for a Northern Ireland licence.

EPP licences can include substances classified as poisons. In Northern Ireland, poisons are the responsibility of the devolved administration. To import, acquire, possess or use poisons in Northern Ireland , contact the

Your licences will still be recognised as valid in England, Wales and Scotland.

Amend a licence

You must amend your EPP licence if you:

• have changed your name since your current licence was issued
• have changed your address since your current licence was issued
• have changed your storage or usage address since your current licence was issued
• need to change the substances, concentration or volume of those substances that your current licence covers you to acquire, possess or use

As part of your licence conditions, you must contact the Home Office immediately by completing the online amendment application and returning your licence. Further instructions for returning your licence will be issued in the confirmation email upon completing your application.

Once both your amendment application form and licence have been received, the Home Office will aim to process your application within 16 weeks. You will receive an email once a decision on your application has been made. If accepted, a new licence will be posted to you separately.

Other changes

You must notify the Home Office immediately if there has been any change in your mental health condition or a condition relating to substance misuse that may affect your ability to safely possess and use the substances specified on the licence.

If you receive a criminal conviction, you must inform the Home Office without undue delay. This includes motoring offences, binding overs, formal written warnings and cautions and convictions in or outside Great Britain. Details of parking offences and fixed penalty notices are exempt.

Contact the Home Office EPP Licensing Unit at epp@homeoffice.pnn.police.uk if you wish to amend your contact details.

Amendments are free of charge.

Replace a licence

As part of your EPP licence conditions you must inform the Home Office, without undue delay, of the theft, loss or destruction of your licence.

You must report any theft of your licence to the police if you wish to apply for a replacement. You will receive a police crime reference number, which you will need to complete your online application for a replacement licence.

If your licence has been damaged, you must return any remaining parts to the Home Office. Further instructions for returning your licence will be issued in the confirmation email upon completing your application.

The cost of a replacement licence is £25. You can pay by either debit or credit card. Once your online amendment application form and replacement fee been received, the Home Office will endeavour to process your application within 16 weeks. You will receive an email once a decision on your application has been made. If accepted, a licence will be posted to you separately.

Renew a licence

EPP licences are valid for 3 years, or until the identity documentation you used to apply expires.

We recommend you complete the online renewal application 8 weeks before the expiry date. After you have completed your online renewal application, returned your old licence and paid the renewal fee, the Home Office will begin the renewal process. Further instructions for returning your old licence to the Home Office will be issued in the confirmation email upon completing your application.

The cost of a renewal is £39.50. You can pay by either debit or credit card.

The Home Office will conduct checks into your suitability, including both criminal record and health checks. Offences that might be considered relevant to these checks are listed in our due diligence checks document.

You will receive an email once a decision on your application has been made. If accepted, a new licence will be posted to you separately.

Non-compliance

If you do not advise the Home Office of any changes to your circumstances or the loss, theft or destruction of your licence, you are not complying with the licence conditions and your licence may be suspended or revoked. This could result in you being in breach of the Poisons Act 1972 and the Control of Poisons and Explosives Precursors Regulations 2015.

Disposal

If you do not require or no longer want to import, acquire, possess or use your regulated substances, you are required to dispose of these substances appropriately.

As well as disposing of substances, you must return your licence to the Home Office as soon as possible.

You can return your licence by posting it to: 

It is the responsibility of the licence holder to dispose of their regulated substances appropriately. The Home Office recommends contacting your local council if you require the disposal of regulated substances.

Individuals in England and Wales can also use the Find a local hazardous waste disposal service - 51²è¹Ý (www.gov.uk).

Certificate of good conduct (non-UK citizens only)

You do not need to provide a certificate of good conduct if you are a UK citizen.

All non-UK citizens should provide a certificate of good conduct. A certificate of good conduct is issued by the police in the country of your citizenship. It will provide details of your criminal record or show that you do not have one. If you can’t provide a certificate of good conduct when completing the form, you can email one later.

Non-compliance

If you are unable to continually demonstrate suitability to hold a licence, your licence may be suspended or revoked. This could result in you being in breach of the Poisons Act 1972 and the Control of Poisons and Explosives Precursors Regulations.

Additional transaction sheets

All transactions must be recorded by the supplier on the back of your licence within the transactions table.

You are required to request additional transaction sheets from the Home Office if you run out of entries on the transactions table. Suppliers may refuse the sale of a substance if the transactions table on your licence does not allow for further entries.

Background legislation

On 26 March 2015, the Poisons Act 1972 was amended via the Deregulation Act 2015 and the Control of Poisons and Explosives Precursors Regulations 2015 were introduced to create a cohesive regime to control sales of explosives precursors and poisons.

The Poisons Act 1972 (Explosives Precursors)(Amendment) Regulations 2018 were introduced to make sulfuric acid a regulated explosives precursor. Offences relating to the acquisition, importation and supply of sulfuric acid above 15% weight by weight were effective from 1 July 2018. Offences relating to the possession and use of sulfuric acid above 15% weight by weight were effective from 1 November 2018.

The Control of Poisons and Explosives Precursors Regulations 2023 introduced new substances to the lists of regulated explosives precursors and poisons. Offences relating to the acquisition, importation, supply, possession and use of the following substances are effective from 1 October 2023:

• hexamine
• hydrochloric acid above 10% w/w
• phosphoric acid above 30% w/w
• ammonium nitrate above 16% nitrogen
• aluminium sulfide, sodium sulfide, calcium sulfide and magnesium sulfide
• arsenic compounds (specifically, calcium arsenites, copper acetoarsenite, copper arsenates,lead arsenates)
• mercury compounds (mercuric chloride, mercuric iodide, organic compounds of mercury except compounds that contain a methyl group directly linked to the mercury atom)
• zinc phosphide
• calcium phosphide
• 2,4-Dinitrophenol

Contact

For queries about licensing, please email epp@homeoffice.pnn.police.uk.