Drug test kits –
Drug purity testing kits
POPULAR
Harm reduction
The best way to avoid substance risk is to avoid drug use but that is not always possible. What always helps is nonjudgemental support and tools to improve safety – such as reagent test kits.
After years of research we are proud to present tests for over 700 psychoactive substances. Your safety deserves the best drug testing kit.
Frequently Asked Questions
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PRO Test kits help identify a substance and estimate it’s purity using just a tiny sample.
We offer both qualitative and semi-quantitative presumptive substance analysis test kits for MDMA, LSD, THC and 700+ other substances. Most of PRO Tests consist of colorimetric reagents similar to those used by the police, simple chemicals that change color upon contact with even trace amount of another substance. Most of purity PRO Tests are calibrated TLC (Thin Layer Chromatography) kits. All PRO Tests are non-medical products, with the exception of repurposed fentanyl test strips.
QUALITATIVE TESTS
Those are the single-use / multi-use tests for PRESENCE of a substance, but not PURITY or QUANTITY. They can:
1) Detect presence of a substance and confirm if it is not present at all
2) Detect certain adulterants even if the expected substance is also presentMost of those are colorimetric reagent tests. They can only detect an adulterant if it produces a more vibrant color than the expected substance and are prone to false positives. That’s why it’s important to use more than 1 reagent to increase analysis precision. Fentanyl tests strips on the other hand, if used correctly, can detect fentanyl even in the presence of other compounds.
All of the individual qualitative tests that we offer are: Cannabis (4-AP), Ehrlich, Froehde, Hofmann, Marquis, Mecke, Morris, Liebermann, Robadope, Simon’s, Zimmermann / Beam, TLC cannabis dye and fentanyl test strips.
SEMI-QUANTITATIVE TESTS
These are the multiple-use tests to estimate PURITY and QUANTITY. They come in 2 types:
1) Quantity / potency reagent tests do not directly detect any adulterants. We offer the THC/CBD reagent tests of this kind for either THC or CBD dominant samples. It reveals whether THC or CBD is the main ingredient and can help estimate the amount as well.
2) TLC purity tests can separate a sample into different substances and then help estimate quantity. TLC tests don’t identify substances alone (unless you have an already confirmed reference sample) and work best paired with 1-2 reagent tests. At the moment you can precisly estimate amount of MDMA, THC, CBD and discover the main ingredient of 700+ other substances. -
If you are a new to drug checking we recommend one of our tailored per substance single-use kits (5€ per test with FREE worldwide delivery) or multiple-use sets (about 20€ for 100 uses of several different reagents).
If you want to compare reagents, see the chart below. ➕➕ = positively indicates presence of expected substance. At least 2 are required. ➕ = positively indicates presence of some adulterants (see footnotes). ➖ = not applicable.
Drug / Reagent Cannabis (4-AP) Ehrlich Hofmann Froehde Liebermann Marquis Mecke Morris Robadope Simon’s Zimmermann 2C-B ➖ ➖ ➖ ➕➕ ➕➕/➕ ➕➕/➕ ➕➕ ➖ ➕➕ ➕ ➕ Amphetamine ➖ ➖ ➖ ➕ ➕➕/➕ ➕➕ ➕ ➖ ➕➕ ➕ ➕ Benzodiazepines ➖ ➖ ➖ ➖ ➖ ➖ ➖ ➖ ➖ ➖ ➕➕ Cannabinoids ➕➕/➕ ➖ ➖ ➖ ➖ ➖ ➖ ➖ ➖ ➖ ➕➕ Cocaine ➖ ➕ ➖ ➕ ➕➕/➕ ➖ ➕ ➕➕ ➕ ➕ ➕ DMT ➖ ➕➕ ➕➕ ➕➕ ➕➕ ➕➕ ➕➕ ➖ ➖ ➖ ➖ Ketamine ➖ ➖ ➖ ➕ ➕➕/➕ ➕ ➕ ➕➕ ➕ ➕ ➕ LSD ➖ ➕➕ ➕➕ ➕ ➕ ➕ ➕ ➖ ➕ ➖ ➖ MDA ➖ ➖ ➖ ➕➕ ➕➕ ➕➕ ➕➕ ➖ ➕➕ ➕ ➕ MDMA ➖ ➖ ➖ ➕➕ ➕➕ ➕➕ ➕➕ ➖ ➕ ➕➕ ➕ Mephedrone ➖ ➖ ➖ ➕ ➕➕/➕ ➕➕ ➕ ➖ ➕ ➕➕ ➕➕ Methamphetamine ➖ ➖ ➖ ➕ ➕➕ ➕➕ ➕➕/➕ ➖ ➕ ➕➕ ➕ - Cannabis – primary test for THC / CBD, helps rule out synthetic cannabinoids
- Ehrlich – primary test for all indoles, e.g. lysergamides and tryptamines but also 5-HTP and more, secondary test for cocaine
- Hofmann – primary test for lysergamides and tryptamines, more precise but slower than Ehrlich
- Froehde – primary test for most powders, secondary test for ketamine and amphetamines, long shelf life
- Liebermann – primary test for most powders, secondary test for cocaine (detects levamisole)
- Marquis – primary test for most powders, secondary test for ketamine, mephedrone and psychedelics
- Mecke – primary test for most powders, secondary test for cocaine, ketamine and mephedrone
- Morris – primary test for cocaine and ketamine, can tell apart some novel dissociatives
- Robadope – primary test for primary amines, e.g. MDA, amphetamine or PMA
- Simon – primary test for secondary amines, e.g. MDMA, meth, mephedrone, methylone or PMMA
- Zimmermann – primary test for cathinones and benzodiazepines in general, detects also CBD
Fentanyl Test Strip to detect fentanyl, even if it is mixed in another substance.
To discover all adulterants and quantity pair reagents with a TLC Purity Test Kit. TLC tests enable you to separate sample into different substances and estimate quantity. Purity tests alone don’t identify substances and are best paired with 1-2 reagent tests.
To test cannabis, we recommend using the TLC Cannabinoid PRO Test. It doesn’t require additional reagents if you know whether your substance is THC or CBD dominant and shows all cannabinoids present and their ratios.
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Yes, test kits are 100% legal and safe to purchase. To ensure maximum privacy we encourage you to pay with a cryptocurrency and order to a friend. Customer data is deleted automatically.
All our reagent bottles are shipped tightly packed in a plastic jar filled with hygroscopic vermiculite for your safety. Vermiculate is completely safe and will absorb any spills, however remember to always wear gloves when handling reagents. Avoid fumes and use protective eyewear if available.
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Yes, all packages are sent in plain envelopes or boxes. We do not sign with our full brand name, but with our company name abbreviation “C.S. sp. z o.o.” instead. If you are worried what to tell your roommates, if required it’s best to honestly admit that you want to keep your friend safe.
Gift wrap available. Keep nosy roommates away from your purchase.
Ultra-stealth delivery available – upon customer request in the checkout notes we will remove all drug-related printouts from inside of package.
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Brown or grey particles are vermiculite, hygroscopic safe substance used to absorb any spills in case of damage in transit.
Crystals inside glass bottles are normal, it’s the new and improved reagent formula. Read more in our blog post.
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Dispatch:
All DPD / DHL orders placed before 10:00 GMT are shipped on the same day from Monday to Friday, excluding holidays.
All mail orders are shipped on Tuesday and Friday, excluding holidays.
Delivery options:
- Personal pickup – available in Warsaw, Poland
- Priority Mail – starting at 5,00€ – for single-use kits or non-EU orders
- Express: DPD / DPD Pickup Points (Carbon Neutral) – starting at 11€+, available only in Europe
- Express: DHL – available in Europe for small packages, most affordable to countries far from Poland
Please note that because DHL does not provide any list of more expensive postal codes we are forced to check cost of each delivery on case to case basis. If there is an unexpected DHL surchage we will deliver the package via DPD.
For legal and safety reasons we do not mail any TLC test kits. All dangerous liquids products are delivered by a safety compliant courier (EU only) to ensure secure and express delivery.
Delivery time:
Please note that all delivery dates are estimated by the shipping companies, not guaranteed.
- Mail usually takes 2-5 work days, however please allow up to 21 days after shipping for your package to arrive.
- DPD / DHL is usually delivered within 2-5 days. Please follow the tracking and call relevant shipping company in case of any issues.
Russia & Belarus:In protest against Russian invasion in Ukraine we do not sell our products to Russia and Belarus.We donate 5% of profits to Polish Humanitarian Action in Ukraine. Slava Ukraini!United Kingdom:In regard to partnership with reagent-tests.uk we only sell to the UK the individual reagents unavailable at rt-uk. -
Yes, we offer:
- Free non-tracked priority air mail for all single-use reagent test orders
- Free express courier* shipping for all orders above 100€ (mutually exclusive with discount codes)
*If your order exceedes 100€ but does not contain any reagent tests we will ship it by tracked priority air mail.
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We do ship all our products worldwide except for TLC test kits.
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- Cash (in person)
- Bank transfer to “C.S. sp. z o.o.”
- Przelewy24 (Visa, MasterCard, Google Pay)
- Zonda (BTC, BCC, BTG, ETH, LTC, LSK, Dash, XRP, ZEC, TRX, DOGE)
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After placing an order, our automatic e-mail system generates and sends you all the details, including tracking link if available. If you don’t see a new message in your inbox, please make sure to check your spam folder.
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We accept returns for 30 days after purchase if the product is not used.
We refund full product cost for any undelivered order in Europe. We do not refund shipping costs for orders shipped to an address passed on by a customer. Please double check you address before ordering. Delivery companies unfortunately are not obliged to call before attempting delivery. Keep an eye on tracking and in case of any issues call your local delivery company immediately.
Refunds for purchases made using cryptocurrencies are only available in EUR or PLN via bank transfer.
Because mail tracking is not supported in some countries we DO NOT offer any refunds or reships for non-EU orders.
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Orders
You may write an e-mail to shop [at] protestkit.eu or use the contact form.
Testing
Ask at testing [at] protestkit.eu or use the contact form. Feel welcome to encrypt your message using a website like https://onetimesecret.com.
Don’t forget to check out what other researchers are up to on reddit.com/r/reagenttesting!
PRO TEST REVIEWS
What researchers say

Fast and reliable
Fast and reliable service to Italy. Professional packaging.
Great test kits and prices
Great test kits and prices. The best site for test kits in the world in my opinion. Shipping within Europe fast. Ordered monday received thursday. I ordered a custom kit (Marquis & Ehrlich). Nice customer service, they forgot to ship the spatula and plastic tube that comes with the kit ( no problem for me) and offered a discount the next time I order. Really, this is THE place for testkits! Checkout their app! Thank you guys and girls!
This is a great seller
This is a great seller: my package was lost along the way but with a simple message to them they immediately sorted it and the package arrived.
Very fast shipping
Very fast shipping and great quality product!
The best kit
This is the best kit I’ve ever came across & it’s well worth the money and the delivery cost.