61-73-4

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3,7-Bis(dimethylamino)phenothiazin-5-ium chloride

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	BDPH9BCD53C9

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	LEYH9ACFBF75

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Synonym(s): Ehrlich’s reagent III, Loeffler’s Methylene Blue

Empirical Formula (Hill Notation): C₁₆H₁₈ClN₃S

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	319112	0.05 wt. % in H₂O
	03978	concentrate according to Ehrlich, concentrated, aqueous solution
	77515	suitable for microscopy
	50484	suitable for microbiology

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Synonym(s): Methylthioninium chloride, Methylene blue

Empirical Formula (Hill Notation): C₁₆H₁₈ClN₃S

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	457250	—	solid	100	OK to freeze

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Synonym(s): Methylthioninium chloride, Methylene blue

Empirical Formula (Hill Notation): C₁₆H₁₈ClN₃S

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	Y0001744	European Pharmacopoeia (EP) Reference Standard

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Empirical Formula (Hill Notation): C₁₆H₁₈ClN₃S · xH₂O

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	M4159	suitable for nucleic acid staining, BioReagent
	66720	purum p.a., suitable for microscopy, ≥97.0% (calc. based on dry substance, AT)
	28514	≥95% (calc. to the dried substance)

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Synonym(s): 3,7-bis(Dimethylamino)phenazathionium chloride, Tetramethylthionine chloride, Methylene Blue hydrate

Empirical Formula (Hill Notation): C₁₆H₁₈ClN₃S · xH₂O

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	M9140	Dye content, ≥82%, certified by the Biological Stain Commission, powder
	1428008	United States Pharmacopeia (USP) Reference Standard
	PHR3838	certified reference material, pharmaceutical secondary standard

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Synonym(s): Methylene Blue hydrate

Empirical Formula (Hill Notation): C₁₆H₁₈ClN₃S · xH₂O

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	M1800900	European Pharmacopoeia (EP) Reference Standard