2C-B Dual SIN Reagent Test Kit (2 tests)


Discreet packaging, with no mention of “SIN”.
SAME DAY shipping for all orders paid until 11 GMT.

  • 2in1 – 1x MARQUIS test, 1x MECKE test
  • Instructions (for 550+ substances with apps)
  • 1 micro spatula
  • Available also as multiple-use bottles

Mix&Match! (discounts apply in cart):
Get 2 kits, receive 4 tests3.25 € each
Get 4, pay for 3 (8 tests / 2.95 €)
Get 7, pay for 5 (14 tests / 2.82 €)
Get 10, pay for 7 (20 tests / 2.75 €)


By purchasing SIN Dual 2C-B Test Kit you support our fight for drug policy based on harm reduction, human rights, and facts, not prejudice.

Mix&Match! (Dual kits discounts apply in cart):

  • 2 Duals = 4 tests / 3.25 €
  • 3 Duals = 6 tests / 3.04 €
  • 4 Duals = 8 tests / 2.95 €
  • 5 Duals = 10 tests / 2.89 €
  • 6 Duals = 12 tests / 2.85 €
  • 7 Duals = 14 tests / 2.82 €
  • 8 Duals = 16 tests / 2.79 €
  • 9 Duals = 18 tests / 2.78 €
  • 10 Duals = 20 tests / 2.75 €



Dual 2C-B Test Kit comes with 2 single-use reagents for 2C-B, „Ecstasy” as well as their common adulterants. It is used to positively identify 2C-B/C/H/I, 5-MAPB, 6-APB, 6-APDB, MDxx, meth/amphetamines, and to rule out cathinones, DXM, PMA/PMMA, and different, less predictable and less desirable, highly toxic dangerous drugs. Multiple reagents are required to detect adulterants and increase analysis precision.

The Dual 2C-B Test Kit instructions and apps feature over 550 substances. Each single-use vial contains 0,2 ml (4 drops) of a reagent. Glass protects reagents from light, plastic, and moisture to ensure prolonged shelf life. For extra-stealth ask us in the checkout notes to remove substance-related stickers and fliers.

SIN Dual 2C-B Test Kit consists of 2 reagents: Marquis and Mecke (2 tests total). It’s best to use this set for 2C-B, MDxx or meth/amphetamine, but it’s also good for benzofurans, cathinones, and opioids.

NOTE: Reagents deteriorate with time, especially if exposed to sunlight or not refrigerated. If you are uncertain whether a reagent will work, test it with a previously checked sample.

Are you still looking for the best reagent test? See all drug testing kits HERE.    



NOTE: Dual 2C-B Test Kit can only test the PRESENCE, not PURITY or QUANTITY of a specific substance. Always test under a strong light and using the smallest possible sample. Never open more than 1 bottle at once, if you make a mistake you might contaminate the reagents and spoil them. If a few reactions are happening at once, only the darkest one of them will be visible.

TL;DR: Here is an image with a quick cheat sheet how to use the 2C-B test kit, or check out more detailed guide on how to test 2C-B further below.

Dual MDMA Test Kit Flowchart
How to test 2C-B? Instructions how to use the 2C-B Test Kit with reagent tests Marquis and Froehde. This is the same set as an MDMA test kit.

BEFORE using a 2C-B reagent test kit

  • It’s RECOMMENDED to record the reaction to compare later

STEP ONE for testing 2C-B pills / capsules / powder

  • Take and finely crush a small piece, no bigger than a head of a needle – like this •.
  • Carefully open a vial and using included spatula move the sample into the vial.
  • Wait for the results and check instructions.
  • Dispose of safely.
How to test 2C-B? Testing 2C-B (right) and MDMA (left) using Marquis reagent included in the 2C-B Test Kit. MDMA turns black with a purple/brownish hue, and 2C-B goes yellow and then green. The same kit is recomended for testing MDMA.

How to use a 2C-B reagent test kit?

  • Check test results with Marquis test kit: if testing 2C-x (2C-B/C/H/I) the color of the reaction should be yellow turning green.
  • To tell apart 2C-B and other 2C-x compounds use Mecke test kit, which turns orange with 2C-B.

AFTER using a 2C-B test kit

  • OPTIONAL: Pour baking soda over a finished reaction to neutralize used reagents.
  • Wash testing surface under running water.


  • Fizzing. Any synthetic drug in a form of salt will bubble with most reagent tests, which are strong acids. If you see only fizzing instead of color change, that can indicate presence of a new psychoactive substance.
  • Speed of the reaction does not indicate quantity nor purity. However, if you are having trouble interpreting your result try using a bigger sample or crushing it better before testing.
  • How many tests can you get from one test kit? A multiple-use test kit lasts up to 100 (5 ml) or 200 (10 ml) tests. Each drop equals one test. A single use-test kit contains 2 disposable ampoules (2 tests).

All 2C-B test results:

MARQUIS Yellow > Green
MECKE Yellow > Orange
LIEBERMANN Yellow > Black
FROEHDE Yellow > Green
EHRLICH No color change
HOFMANN No color change
SIMON’S No blue color change
ROBADOPE Slow pink
SCOTT No full color change

2C-B test did not react as indicated? Watch out!
All test results are available in our instructions and TestDrugs apps.

How to check if reagent for testing 2C-B works?

  • Test any substance and compare color reactions with instructions. It’s easiest to use aspirin – Marquis reagent reacts to it with a slow pink or orange color change.
  • Keep a sample to compare later in case of doubt. If control sample reacts fine, it means the reagent still works.

Looking where to buy a different reagent test for 2C-B?



Reagents consist mostly of concentrated acid and are strong enough to burn skin and clothing. Keep out of eyes and mouth. Keep away from children. Always use in a well-ventilated area. Wear gloves (supplied) when handling the bottle and cap. Wear protective eyewear. Never point towards face etc. If you get some on you/clothing, then immediately wash with soap and water. Wash testing surfaces with soap and water as well. Dispose of any unwanted reagent down the sink with running water and baking soda (supplied), ventilate. Store all testing kits away from any heat in a cool, dark place between uses. The average shelf life of 1 year can be significantly extended by storing in a freezer (warm to room temperature before use).

A positive or negative reaction for a substance does not indicate if it is safe. No substance is 100% safe.

Additional information

Weight 0.049 kg
Okres przydatności

2 lata lub więcej


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