3-MMC is most commonly found in white or crystalline powder form in "legally high grade" preparations or research chemicals (RCs). It is sold in quantities of 0.1 to 30 g (usually 0.2 to 0.5 g). 

The most common routes of 3-MMC administration are insufflation (snoring) and oral injection or less often. You can also get information about 3MMC Powder via https://www.flowstoflab.nl/.

3MMC crystal best

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3-MMC is often swallowed after being wrapped in parchment paper (bombing or tapping). Sometimes used in conjunction with alcohol (dissolved in a drink). 

Repeated applications within a session are very common, often in different ways. Repeated doses are caused by a short duration of the psychoactive effect. This may be related to the short half-life of 3-MMC, which has been set to 0.8 h. 

There are limited data on pharmacokinetics or pharmacodynamics, human or animal toxicity, addiction or potential acute overdose, and the long-term effects of 3-MMC. 

Most of the data on its effects are self-reported and include euphoria, joy, empathy (openness, love, kindness, and well-being), stimulation (rush), and musical and sensory awareness ratings. Higher doses can cause anxiety, blurred vision, sweating, insomnia, dizziness, confusion, loss of coordination, and seizures. 

3-MMC users report that the effect is much milder and less "brutal" than that obtained after using mephedrone and is therefore preferred.