4-BMC

4-BMC

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4-BMC: Chemical Information, Research, Effects and Safety

What Is 4-BMC?

4-BMC (also known as 4-bromomethcathinone or brephedrone) is a synthetic cathinone and a new psychoactive substance. It has the chemical name 1-(4-bromophenyl)-2-(methylamino)propan-1-one. It is classified by researchers amongst the wider cathinone and phenethylamine-related chemical families.

4-BMC is not an approved medicine and therefore has no accepted therapeutic indication. Instead, it has been studied by researchers and forensic laboratories in an effort to better understand its chemical properties, biological activity, metabolism and possible dangers.

4-BMC Chemical Information

There are a number of key chemical identifiers that researchers use to distinguish 4-BMC from related substances.

Basic Chemical Information

  • Common name : 4-BMC
  • Chemical name: 1-(4-bromophenyl)-2-(methylamino)propan-1-one
  • Other name Buphedrone
  • Molecular formula C10H12BrNO
  • Molecular weight : 242.11 g.mol⁻¹
  • CAS No. 486459-03-4
  • CID 10421832 in PubChem

PubChem provides the molecular formula, molecular weight and chemical identifiers for 4-bromomethcathinone.

How does 4-BMC compare to other Cathinones?

4-BMC is in the synthetic cathinone group. It is structurally related to compounds such as methcathinone, 4-MMC (4-methylmethcathinone; mephedrone) and 4-CMC. 4-BMC differs from a number of related cathinones in the para-position bromination of the phenyl ring.

Researchers should be careful not to automatically extrapolate information from one cathinone to 4-BMC, as structurally similar compounds may differ in their biological effects and risks.

What Does the Research Say about 4-BMC Online?

4-BMC has been the subject of scientific and forensic study as a psychoactive synthetic cathinone. There is evidence that it interacts with monoamine neurotransmitter systems, including serotonin, norepinephrine and dopamine pathways. However, the available human evidence is limited when compared to established medications.

Moreover, researchers are still investigating the metabolism and identification of 4-BMC in biological samples. One study in 2024 investigated human metabolic pathways of 4-BMC and related methcathinone analogues.

Safety & Potential Risks

4-BMC is not to be regarded as an approved medicine or dietary supplement. Its pharmacological effects and toxicity profile are not well enough characterised to establish a safe recreational or therapeutic dose.

And recent scientific literature has further raised serious toxicological concerns. A forensic report in 2026 reported a fatal case with 4-BMC and discussed the toxicological findings of the substance.

Therefore, people should not believe any online dosage guide, product description or claims that 4-BMC is safe. Unknown purity and contamination, individual health factors and interactions with other substances can also increase risk.

Legal/Regulatory Environment

The legal status of 4-BMC is different in various jurisdictions. The European Union Drugs Agency (EUDA) is currently monitoring 4-BMC as a new psychoactive substance under the European Union Early Warning System. The agency released an initial report because of concerns about possible public-health risks.

Therefore, anyone working with or investigating this compound should check the current regulations in their country or institution.

Summary

4-BMC (4-bromomethcathinone) is a synthetic cathinone that has a documented history in forensic and scientific research. Its chemical structure is related to several other substituted cathinones and its biological effects and toxicological profile are still under study .

Most importantly, 4-BMC is not approved medicine and there is currently no evidence to suggest a reliable safe dosage for human consumption. Therefore, researchers should consult with institutional safety requirements, refer to authoritative scientific and regulatory sources, and follow suitable laboratory procedures when assessing this compound.

Additional Information

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10 Gram, 25 Grams, 50 Grams, 100 Grams, 250 Grams, 500 Grams, 1000 Gram

21 reviews for 4-BMC

  1. Tyler (verified owner)

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