Merck
All Photos(2)

1.59270

Supelco

Methylene blue (C.I. 52015)

Reag. Ph Eur

Synonym(s):
Methylthioninium chloride, 3,7-Bis(dimethylamino)phenothiazinium chloride, Tetramethylthionine chloride, Methylene Blue trihydrate
Empirical Formula (Hill Notation):
C16H18ClN3S · 3H2O
CAS Number:
Molecular Weight:
373.90
Beilstein:
3599847
MDL number:
EC Index Number:
200-515-2

Quality Level

Agency

reag. Ph. Eur.

form

powder

potency

1180 mg/kg LD50, oral (Rat)

loss

10-15% loss on drying, 110 °C

color

dark green

pH

3 (20 °C, 10 g/L in H2O)

mp

190 °C (dec.) (lit.)

solubility

50 g/L

bulk density

400‑600 kg/m3

λmax

660-665 nm at 50% in ethanol

storage temp.

2-30°C

SMILES string

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

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

InChI key

CXKWCBBOMKCUKX-UHFFFAOYSA-M

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Analysis Note

Appearance: Dark green powder, eventually with granular and bright parts.
Identity (UV/VIS-Spectrum): passes test
Absorption maximum λmax. (ethanol 50 %): 660 - 665 nm
Spec. Absorptivity A 1%/1cm (λmax; 0.003 g/l; ethanol 50 %): 2250 - 2750
Loss on drying (110 °C): 10 - 15 %

Pictograms

Exclamation mark

Signal Word

Warning

Hazard Statements

Precautionary Statements

Hazard Classifications

Acute Tox. 4 Oral

Storage Class Code

11 - Combustible Solids

WGK

WGK 2

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