MARQUIS Reagent SIN Test Kit

Rated 4.78 out of 5 based on 7 customer ratings
(7 customer reviews)


Discreet or Ultra-stealth packaging available
SAME DAY shipping for all purchases before 11 GMT

  • 1 Bottle of MARQUIS reagent (100-200 uses) 
  • 2 Gloves, 1 Double Ceramic Spotting Plate, 1 Microspatula
  • Instructions for use (for 550+ substances)
  • Acid neutralizer (baking soda)

ATTENTION! “Refill” = only the bottle



By purchasing the Marquis reagent and shopping with SIN you support harm reduction and fight for drug policy based on facts and human rights, not prejudice.



Never use just one reagent and always make sure to have MARQUIS. It is used to positively identify MDxx („Ecstasy”), Meth/Amphetamines, 2C-x, Cocaine, Heroin, other Opioids, over 550 substances altogether, and to rule out Cathinones and different, less predictable and less desirable, highly toxic dangerous drugs. Reagents can only be used to test the PRESENCE, not PURITY or QUANTITY of a specific substance.  Adulterants usually do not react with a distinct color, try to detect them using multiple reagents.

Marquis Reagent SIN Test Kit comes with instructions for over 550+ substances, as well as apps, tips, and tricks. Each bottle contains 5 or 10 ml, with each 1 drop accounting for 1 use, 100-200 total. Brown amber glass bottles protect reagents from light, plastic, and moisture to ensure a prolonged shelf life. Special high-quality HDPE dropper guarantees 0 spills.Same day shipping in a discreet small plain box with no SIN information on the outside. For Ultra-stealth ask us in the checkout notes to remove fliers or stickers.

Are you looking for different reagents? You will find them HERE.




To begin testing, scrap a grain of pill or powder and drop the reagent onto it. A positive result will show as a color changing reaction. No reaction is caused by Cathinones, PMA, PMMA but also Cocaine and many other substances or lack of active ingredient. CHECK TESTDRUGS APPS –




The reagents should be stored in a fridge, where they will last at least 24 months. Unfreeze/warm to room temperature before use. Keep the test away from the sun in a cool, dark place. 




Most reagents are primarily concentrated acid with other potentially dangerous chemicals 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.

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

Additional information

Weight 0.28 kg

Refill 5ml (~100 tests), Refill 10ml (~200 tests), Kit 5ml (~100 tests), Kit 10ml (~200 tests)


5ml (~100 tests), 10ml (~200 tests)

Shelf life in the fridge

12 months +

7 reviews for MARQUIS Reagent SIN Test Kit

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  1. Rated 5 out of 5

    eBay Buyer t***a

    Very fast postage from Poland to Aus. Genuine product – Very Happy

  2. Rated 5 out of 5

    eBay Buyer a***h

    Fast delivery, good item.

  3. Rated 5 out of 5

    eBay Buyer m***!


  4. Rated 5 out of 5

    eBay Buyer i***h

    alles top, gerne wieder

  5. Rated 3 out of 5

    eBay Buyer m***6


  6. Rated 5 out of 5

    eBay Buyer h***1


  7. Rated 5 out of 5

    eBay Buyer j***4

    Smooth transaction. Pleasure to do business with.

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