🔬 Adulterant | ⚗️ Effect on Recrystallization | 🧊 Appearance When Cooled |
💎 MSM (Methylsulfonylmethane) | Delays or prevents; forms oily mix that resists solidifying | Clear or cloudy oil that stays liquid |
💧 Water (moisture contamination) | Slows or halts; may result in syrupy consistency | Syrupy or tacky layer that dries slowly |
🧪 Acetone/Ether (solvent residues) | MA remains dissolved; needs full evaporation to crystallize | Oil with slow evaporation and delayed solidifying |
☕ Caffeine | Hygroscopic; traps moisture and delays recrystallization | Sticky mess; may remain brownish or clumpy |
🌿 Ephedrine/Pseudoephedrine | May recrystallize but introduces artifacts or stickiness | Partial recrystallization with clouding |
⚖️ dl-Methamphetamine (racemate) | Slow, uneven crystal formation; may stay waxy or oily | White-yellow wax or smeared residue |
🍬 Sugars (e.g., glucose, sucrose) | Sticky or gooey residue; often caramelizes if heated | Burnt sugar smell; amber droplets |
🥄 Baking soda / Soda ash | Forms cloudy or chalky paste; rarely crystallizes | No crystals, opaque mass |
💊 Vitamin B powders (e.g., B1, B6) | Creates colored powdery mix; does not recrystallize | Chalky or powdery residue |
🪨 Talc / Inert fillers | Remains gritty or powdery; does not form crystals | Dry but gritty and non-reactive |