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Methylene blue (trihydrate)

Methylene blue trihydrate (C.I. Basic Blue 9 trihydrate) is a guanylyl cyclase (sGC), monoamine oxidase A (MAO-A) and NO synthase (NOS) inhibitor. Methylene blue trihydrate is a vasopressor and is often used as a dye in several medical procedures. Methylene blue trihydrate has antinociception, antimalarial, antidepressant and anxiolytic activity effects. Methylene Blue trihydrate has the potential for methemoglobinemias, neurodegenerative disorders and ifosfamide-induced encephalopathytreatment[1][2][3].

Product Specifications

CAS Number

[7220-79-3]

Product Name Alternative

C.I. Basic Blue 9 trihydrate

UNSPSC

12352005

Hazard Statement

H302, H315, H319, H335, H350, H360

Target

Guanylate Cyclase; Monoamine Oxidase; NO Synthase; Parasite

Type

Reference compound

Related Pathways

Anti-infection; GPCR/G Protein; Immunology/Inflammation; Neuronal Signaling

Applications

Cancer-programmed cell death

Field of Research

Cancer; Infection; Neurological Disease

Assay Protocol

https://www.medchemexpress.com/methylene-blue-trihydrate.html

Concentration

10mM

Purity

98.0

Solubility

DMSO : 100 mg/mL (ultrasonic)

Smiles

CN(C1=CC(SC2=C/C(C=CC2=N3)=[N+](C)\C)=C3C=C1)C.O.[Cl-]

Molecular Formula

C16H24ClN3O3S

Molecular Weight

373.90

Precautions

H302, H315, H319, H335, H350, H360

References & Citations

[1]Delport A, et al. Methylene blue and its analogues as antidepressant compounds. Metab Brain Dis. 2017 Oct;32 (5) :1357-1382.|[2]Masaki E, et al. Methylene blue, a soluble guanylyl cyclase inhibitor, reduces the sevoflurane minimum alveolar anesthetic concentration and decreases the brain cyclic guanosine monophosphate content in rats. Anesth Analg. 1999 Aug;89 (2) :484-9.|[3]McCartney SL, et al. Intraoperative vasoplegia: methylene blue to the rescue! Curr Opin Anaesthesiol. 2018 Feb;31 (1) :43-49.

Shipping Conditions

Room Temperature

Storage Conditions

-20°C, 3 years; 4°C, 2 years (Powder)

Scientific Category

Reference compound1

Clinical Information

Launched

Isoform

Plasmodium

Citation 01

BMC Cancer. 2024 Dec 3;24 (1) :1489.|Cell Signal. 2025 Sep 18:136:112145.|Res Sq. 2025 Nov 12.|Bioengineering (Basel) . 2025 Oct 27;12 (11) :1164.|Biomaterials. 2023 Feb:293:121988.|Biomed Res Int. 2021 May 14:2021:5565748.|Cell Rep. 2024 Feb 13;43 (2) :113779.|Cell Rep. 2025 Nov 25;44 (11) :116520.|Chem Eng J. 2025 Nov 24;526:171230.|Curr Res Virol Sci. 2022;3:100019.|Evid Based Complement Alternat Med. 2020 Mar 10;2020:3524641.|Exp Ther Med. 2019 Nov;18 (5) :4049-4057.|Hematology. 2022 Dec;27 (1) :43-52.|J Nanobiotechnology. 2025 Jul 4;23 (1) :485.|Nat Commun. 2024 Nov 27;15 (1) :10303.|Patent. US20230226111A1.|Patent. US20240238271A1.|Patent. US20240325538A1.|Phytomedicine. 2025 Oct 20:148:157423.|Phytother Res. 2023 Apr;37 (4) :1405-1421.|Redox Biol. 2020 Sep;36:101601.|Research Square Print. 2023 Feb 21.|Theranostics. 2021 Oct 17;11 (20) :9884-9903.|World J Gastrointest Surg. 2023 Jun 27;15 (6) :1068-1079.

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