Simon's Reagent Guide: The MDMA vs MDA Differentiator Explained
MDMA and MDA produce different effects, different durations, and have different safety profiles, but they look identical in color and form. Simon's reagent is the only common consumer test that tells them apart. Here is exactly how it works and when to use it.
Why the MDMA vs MDA Distinction Matters
MDMA (3,4-methylenedioxymethamphetamine) and MDA (3,4-methylenedioxyamphetamine) are closely related compounds. Both are empathogens. Both produce feelings of connection and sensory enhancement. But they are not the same drug, and confusing them carries real risks.
| Property | MDMA | MDA |
|---|---|---|
| Duration | 3-6 hours | 5-8 hours |
| Dose | 80-150 mg | 60-120 mg |
| Stimulant effects | Moderate | Stronger, more jittery, more cardiovascular strain |
| Empathogenic effects | Primary effect, strong | Present but weaker than MDMA |
| Visual effects | Mild at typical doses | More pronounced, sometimes described as "psychedelic" |
| Neurotoxicity risk | Lower at responsible doses | Higher, 6x more serotonin transporter damage in animal studies |
| Come down | Gentle, social | Can be harsh, irritable |
MDA is more neurotoxic than MDMA, has a stronger stimulant component that increases cardiovascular risk, and lasts longer. A dose of MDA that feels similar to a standard MDMA dose may produce an unexpectedly intense and dysphoric experience.
How Simon's Reagent Works
Simon's reagent specifically detects secondary amines, molecules where the nitrogen atom has one hydrogen and one organic group attached. MDMA is a secondary amine. MDA is a primary amine (the nitrogen has two hydrogens). Simon's reagent turns bright blue in the presence of secondary amines.
| Substance | Amine Type | Simon's Reaction |
|---|---|---|
| MDMA | Secondary | ✅ Bright blue |
| MDA | Primary | ❌ No reaction |
| Methamphetamine | Secondary | ✅ Bright blue |
| Amphetamine | Primary | ❌ No reaction |
| Cocaine | Tertiary (no N-H bond) | ❌ No reaction |
| Ketamine | Secondary | ✅ Blue (but different shade, use Morris for definitive ID) |
| 2C-B | Primary | ❌ No reaction |
| Methylone (bk-MDMA) | Secondary | ✅ Blue |
The Complete MDMA Testing Protocol
A single reagent cannot confirm MDMA. You need three:
| Reagent | Expected Result | What It Confirms |
|---|---|---|
| Marquis | Purple → Black (instant) | MDMA-class compound present |
| Simon's | bright blue | It is a secondary amine, RULES IN MDMA, RULES OUT MDA |
| Froehde (or Mecke) | Green → Dark Blue/Black | Secondary confirmation, helps rule out PMA/PMMA and synthetic cathinones |
If Marquis turns purple but Simon's does NOT turn blue: You likely have MDA (or, less commonly, another primary amine). Consider dosing lower and shorter (MDA is more potent and lasts longer).
If Marquis does NOT turn purple: What you have is NOT MDMA, regardless of what Simon's or other reagents show.
When to Buy Simon's Reagent
Simon's is not essential for every buyer, but it is highly recommended if:
- You use MDMA regularly and want to know exactly what is in your sample
- You are sensitive to stimulant effects (MDA produces more cardiovascular stimulation)
- You share your drugs with others and want to provide accurate information about what they are taking
- You are at a festival where you may be buying from unfamiliar sources
If you only test occasionally and just want to confirm your ecstasy is not PMA, Marquis alone (purple/black = likely MDMA-class, no reaction = PMA warning) provides the most critical safety signal. Simon's is the upgrade that tells you which specific MDMA-class compound you have.
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Where to Buy
Simon's is available individually or as part of comprehensive kits:
Simon's Reagent, $25.00 CAD (individual bottle)
Pro 6-in-1 Kit, $108.00 CAD (includes Marquis, Simon's, Mecke, Froehde, Morris, Ehrlich)
Complete 9-in-1 Kit, $150.00 CAD (full lab)
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