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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HCID 75889Generated: November 3, 2026

Methylene Green

CI 52020 · CI NO 52020 · Methylene green · C.I. Basic Green 5 · Methylene Green,pure · Methylene green, Certified · C.I.Basic Green 5:C.I.52020 · Methylene Green C.I. No. 52020

https://huagongshe.com/en/chemical/75889

Methylene Green molecular structure

Identifiers & Physical Properties

CAS No.2679-01-8
Molecular formulaC16H17N4O2S.Cl
Average molar mass364.9 g/mol
Monoisotopic mass364.0760747 g/mol
SMILESCN(C)c1ccc2nc3ccc(=[N+](C)C)c([N+](=O)[O-])c-3sc2c1.[Cl-]
InChIKeyYYGBVRCTHASBKD-UHFFFAOYSA-M
PubChem CID75889
ChEBICHEBI:87675
EC No.220-231-2
DTXSIDDTXSID70949598

Chemical & Physical Properties

Topological polar surface area89.7
Hydrogen bond donors0
Hydrogen bond acceptors6
Rotatable bonds1
Heavy atoms24
Formal charge0
Complexity653
Chemical classesDyes -> Azine Dyes
Physical DescriptionBrown-black solid[Acros Organics MSDS]
Physical statePowder
ColorBlack
StabilityStable. Incompatible with strong oxidizing agents.
FDA UNIIF1IO2ZP7BU
Hazard symbolsXn
Risk statements (R)22
Water hazard class (WGK)3

Safety & Regulations

Regulatory informationChemical: Phenothiazin-5-ium, 3,7-bis(dimethylamino)-4-nitro-, chloride
Hazards summaryA skin and eye irritantHarmful by ingestion[Acros Organics MSDS] See Methylene blue and Azure C.
Water hazard class (WGK)3
Risk statements (R)22
Hazard symbolsXn

Preparation & Synthesis

Preparation

commonly known as Methylene Green. (C.I.Basic Blue 9, C.I. 52015) in the first use of hydrochloric acid sodium nitrite processing, and then treated with nitric acid and zinc chloride double salt precipitation..