1 reply to this topic

[Daniel Cooper]

Where are you guys sourcing USP grade methylene blue?  I think I'd rather deal with the powder but an aqueous solution would work as well.  Want to investigate nootropic and anxiolytic properties.

 

 

Edited by Daniel Cooper, 06 May 2020 - 03:24 PM.

[Johnatron]

Daniel,

There seem to be a few grade classifications from different sources, EG AR LR grades or USP etc. 

I can get AR grade and microscopy grade solution which seem to be suitable for use as a supplement. 
Do you or anyone else have experience with using those grades or their purity? There are various reagent suppliers who can sell these. 

 

 

Reagent Grade

• Alternate Names: Analytical Reagent (AR), Guaranteed Reagent (GR), UNIVAR, AnalaR, Premium Reagent (PR)

• Purity Level: Very high purity, meets or exceeds standards set by American Chemical Society (ACS). Batch specific Certificates of Analysis. Assay printed on label.

• Applications: Can be used in all scientific areas where quality is critical. Quantitative analysis in QA environments. Research laboratories. Producing primary standards (buffers, volumetric solutions)

Laboratory Grade

• Alternate Names: Laboratory Reagent (LR), UNILAB, Chemically Pure (CP)

• Purity Level: Relatively high purity, exact levels of impurity unknown. Often meets BP, USP or FG standards – certification needs to be checked if suitable for use in these applications. Product specs generally available.

• Applications: Excellent for teaching and educational labs, not pure enough for food, drug or medicinal use. Often used for general lab work where an analytical reagent is not required.