Methylene Blue

C₁₆H₁₈ClN₃S

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

CAS: 61-73-4

Overview

Methylene blue is a synthetic dye with important medical applications. It is used to treat methemoglobinemia and is on the WHO Essential Medicines List.

Composition

Element	Symbol	Atoms	Atomic Mass
Hydrogen	H	18	1.0080
Carbon	C	16	12.0110
Nitrogen	N	3	14.0070
Sulfur	S	1	32.0600
Chlorine	Cl	1	35.4500

Elemental Composition

Hydrogen ×18

5.7%

Carbon ×16

60.1%

Nitrogen ×3

13.1%

Sulfur ×1

10.0%

Chlorine ×1

11.1%

Uses

• Methemoglobinemia antidote
• Biological stain
• Aquarium treatment
• Surgical dye marker

Fun Facts

✦ One of the first synthetic drugs ever used in medicine, introduced in 1891

Structure

SMILES

CN(C)C1=CC2=C(C=C1)N=C3C=CC(=[N+](C)C)C=C3S2.[Cl-]

Properties

Type: organic
State: solid
Molar Mass: 319.85 g/mol
Melting Point: 190.0 °C
Solubility: 43.6 g/L at 25°C

Molecular Descriptors

Exact Mass: 319.0910
TPSA: 43.9 Å²
H-Bond Donors: 0
H-Bond Acceptors: 4
Rotatable Bonds: 1
Heavy Atoms: 21
Complexity: 483.0

Related Compounds

1,2-Dichloroethane

C₂H₄Cl₂

1,3-Butadiene

C₄H₆

1,4-Dioxane

C₄H₈O₂

1-Butanol

C₄H₁₀O

2-Propanol

C₃H₈O

Acetaldehyde

CH₃CHO

Acetamide

C₂H₅NO

Acetic Anhydride

C₄H₆O₃

Acetone

(CH₃)₂CO

Acetonitrile

C₂H₃N

Frequently Asked Questions

What is Methylene Blue?

Methylene Blue (C₁₆H₁₈ClN₃S) is a organic compound with the IUPAC name 3,7-Bis(dimethylamino)phenothiazin-5-ium chloride.

What is the molecular weight of Methylene Blue?

Methylene Blue has a molar mass of 319.85 g/mol.

What state is Methylene Blue at room temperature?

Methylene Blue is a solid at room temperature.

Is Methylene Blue organic or inorganic?

Methylene Blue is classified as an organic compound.

What elements make up Methylene Blue?

Methylene Blue (C₁₆H₁₈ClN₃S) is composed of Hydrogen (H), Carbon (C), Nitrogen (N), Sulfur (S), Chlorine (Cl).