FAQ

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where to store 13. May 2021

Ideally, in the fridge.


can you travel with these 12. May 2021

Yes. Get in touch by email if you want more specific info depending on the modes of transport you’re using.


Are the reagents legal? Apparently they can be a explosive precursor. 22. April 2021

The products are compliant with the Offensive Weapons Act 2019 and the Poisons Act 1972, indeed the concentration of sulfuric acid is well within the allowable thresholds in law, so no licence is required. The tests cannot be used to make explosives.


How long do they last in the fridge 16. April 2021

About 12 months, if the lid is properly secured. Anything that prevents an airtight seal will rapidly accelerate degradation.


There are crystals in my bottle 6. October 2020

This is normal, please read the instructions and watch the video.


How do I know whether the kits have passed their shelf life? 19. August 2020

See if they respond to aspirin or another substance which you know the identity of. We recommend replacing them after 12 months to be sure that they will work when you need them.


How can I contact you? 22. April 2020

Please reply to the last email we sent you. Alternatively, email askme@reagent-tests.uk. Check the “Terms” page for our phone number


Do the kits go off outside the fridge? I plan to carry them in my luggage while I go travelling across europe. 6. January 2020

The shelf life varies for each one and even then it’s affected by humidity, temperature and oxygen exposure. Our 18*C tests reveal

  • Froehde – over 18 months,
  • Ehrlich – around 1 year,
  • Liebermann – just under 1 year,
  • Marquis – 6-9 months,
  • Mecke – 5-7 months,
  • Mandelin – 5-7 months,


Is packaging discrete? 8. January 2019

It’s a thin box with nothing but your name and address on it.


What happens if a sample contains multiple drugs? 14. August 2017

It will produce a mixture of the colours – a lot like mixing two colours of paint. If you have a powder or crystalline substance with two different looking types of crystal, try to separate them and test them individually.


Can I send you a photo of my test result for clarification? 30. August 2016

Definitely! We love talking about testing, please email admin at reagent-tests.uk.