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5-Methoxytryptamine hydrochloride

Also known as: 5-Methoxytryptamine HCl, Mexamine hydrochloride, 5-MT hydrochloride, O-methyl serotonin hydrochloride, 2-(5-Methoxy-1H-indol-3-yl)ethanamine hydrochloride, 3-(2-Aminoethyl)-5-methoxyindole hydrochloride, 1H-Indole-3-ethanamine, 5-methoxy-, hydrochloride (1:1)

5-Methoxytryptamine hydrochloride (CAS 66-83-1) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C11H15ClN2O and a molecular weight of 226.703 g/mol. Key properties include a melting point of 246 °C, a boiling point of 380ºC at 760 mmHg, a density of 1.171 g/cm3 and a flash point of 183.6ºC. It is classified under GHS with signal word Warning and hazard statements H302 — Harmful if swallowed. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
66-83-1
Jingsj CID
J-1082242-1
Molecular Formula
C11H15ClN2O
Molecular Weight
226.703 g/mol
Category
Organic Acids
Last updated
8/21/2026
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Physicochemical Properties

Melting Point246 °C
Boiling Point380ºC at 760 mmHg
Density1.171 g/cm3
Flash Point183.6ºC
Exact Mass226.087296
PSA51.04000
LogP3.18000
StabilityHygroscopic

GHS Safety & Compliance

IrritantSignal word: Warning
  • H302 — Harmful if swallowed

Customs & Trade Information

HS Code2933990090
Summary2933990090. heterocyclic compounds with nitrogen hetero-atom(s) only. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

Frequently Asked Questions

What is the CAS number of 5-Methoxytryptamine hydrochloride?

The CAS number of 5-Methoxytryptamine hydrochloride is 66-83-1.

What are the molecular formula and molecular weight of 5-Methoxytryptamine hydrochloride?

5-Methoxytryptamine hydrochloride has molecular formula C11H15ClN2O and molecular weight 226.703 g/mol.

Is 5-Methoxytryptamine hydrochloride hazardous?

5-Methoxytryptamine hydrochloride has GHS signal word Warning and hazard statements H302 — Harmful if swallowed.

What are the upstream and downstream products of 5-Methoxytryptamine hydrochloride?

For 5-Methoxytryptamine hydrochloride, Upstream Products: 3-(2-Aminoethyl)-5-methoxy-1H-indole-2-carboxylic acid, 2,3,4,9-tetrahydro-6-methoxy-1H-pyrido[3,4-b]indol-1-one; Downstream Products: Melatonin, 6-Methoxy-1,2,3,4-tetrahydro-9H-pyrido[3,4-b]indole-1-carboxylic acid, 6-Methoxy-1,2,3,4-tetrahydro-9H-pyrido[3,4-b]indole.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated:

How to cite: Jingsj. "5-Methoxytryptamine hydrochloride (CAS 66-83-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1082242-1 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.