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Merck

03978

Methylene Blue solution

concentrate according to Ehrlich, concentrated, aqueous solution

Synonym(s):

Methylene blue stain, Ehrlich’s reagent III, Loeffler’s Methylene Blue

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250 ML

¥9,310

¥9,310

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About This Item

Empirical Formula (Hill Notation):
C16H18ClN3S
CAS Number:
Molecular Weight:
319.85
NACRES:
NA.47
PubChem Substance ID:
UNSPSC Code:
12171500
MDL number:
Beilstein/REAXYS Number:
3641570

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Product Name

Methylene Blue solution, concentrate according to Ehrlich, concentrated, aqueous solution

SMILES string

[Cl-].CN(C)c1ccc2N=C3C=C\C(C=C3Sc2c1)=[N+](/C)C
[Cl-].CN(C)c1ccc2N=C3C=C\C(C=C3Sc2c1)=[N+](/C)C

InChI key

CXKWCBBOMKCUKX-UHFFFAOYSA-M

InChI

1S/C16H18N3S.ClH/c1-18(2)11-5-7-13-15(9-11)20-16-10-12(19(3)4)6-8-14(16)17-13;/h5-10H,1-4H3;1H/q+1;/p-1

form

liquid

quality

concentrated, aqueous solution

shelf life

~3 yr

concentration

1.5% (1.5 g/ 100 mL)

density

1.0 g/mL at 20 °C

εmax

9.4 at 656-666 nm in water

suitability

suitable for microscopy

application(s)

diagnostic assay manufacturing
hematology
histology

storage temp.

room temp

Quality Level

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1 of 4

This Item
3191124572501808
grade

for microscopy

grade

-

grade

-

grade

-

concentration

1.5% (1.5 g/ 100 mL)

concentration

0.05 wt. % in H2O

concentration

-

concentration

1.4 % (w/v) in 95% ethanol

form

liquid

form

liquid

form

solid

form

solution

application(s)

diagnostic assay manufacturing
hematology
histology

application(s)

diagnostic assay manufacturing
hematology
histology

application(s)

-

application(s)

-

shelf life

~3 yr

shelf life

-

shelf life

-

shelf life

-

storage temp.

room temp

storage temp.

room temp

storage temp.

10-30°C

storage temp.

15-25°C

Application

Methylene Blue solution has been used to stain human amniotic fluid stem cells to determine cell viability.[1] It has also been used to stain sections to determine the presence of mycobacteria.[2][3]
Methylene blue is used to stain blood films/smears used in cytology and to stain RNA or DNA for viewing under the microscope or on hybridization membranes.

General description

Methylene blue is used to stain animal cells to make their nuclei more observable. It is a component of staining media such as Wright′s stain and Jenner′s stain.
Methylene blue, also known as methylthioninium chloride, is a photoactive phenothiazine dye.[4] It is a small molecular weight dye,[5] which is effective against Gram positive and Gram negative bacteria.[6]

Storage Class

10 - Combustible liquids

wgk

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter


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Reprogramming human amniotic fluid stem cells to functional pluripotency by manipulation of culture conditions
Moschidou D and Guillot PV
National Protocol Exchange (2012)
Pathogen reduction technology treatment of platelets, plasma and whole blood using riboflavin and UV light
Transfusion Medicine and Hemotherapy (2011)
CLEC9A modulates macrophage-mediated neutrophil recruitment in response to heat-killed Mycobacterium tuberculosis H37Ra
Cheng An-Chieh, et al.
Testing, 12(10), e0186780-e0186780 (2017)
Interferon-gamma is a crucial activator of early host immune defense against Mycobacterium ulcerans infection in mice
Bieri R, et al.
PLoS Neglected Tropical Diseases, 10(2), e0004450-e0004450 (2016)
Real-time fluorescence image-guided oncologic surgery
Advances in Cancer Research (2014)

Questions

  1. Concerning the stated concentration of the product 03978 (Methylene blue solution, 1.5%), what is the uncertainty and lot-to-lot variability?

    1 answer
    1. Product 03978 is not a GMP quality product. No testing is performed during Quality Control testing that measures lot to lot variability. The testing includes tests for Appearance, Thin Layer Chromatography, Density, Wavelength 1 at 656-666nm, Extinction Coefficient for Wavelength 1 and the solvent used to measure the wavelength and extinction coefficient. The information about a 1.5% concentration of dye is from the production documents used to manufacture the dye solution. The actual dye concentration is not measured.

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