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CAS RN: 61-73-4 | Product Number: A5105

Methylene Blue [Ion association reagent for spectrophotometric analysis]

Purity: >98.0%(T)
  • Basic Blue 9
7   ≥20 

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Product Number A5105
Purity / Analysis Method >98.0%(T)
Molecular Formula / Molecular Weight C__1__6H__1__8ClN__3S = 319.85  
Physical State (20 deg.C) Solid
CAS RN 61-73-4
Reaxys Registry Number 3599847
PubChem Substance ID 87563123
Merck Index (14) 6060
Colour Index 52015
MDL Number


Appearance Green to Dark green powder to crystal
Purity(Nonaqueous Titration) min. 98.0 %(calcd.on dried substance)
Lambda max. 661.0 to 665.0 nm(EtOH(50%))
Absorbance min. 0.540(2mg/L, EtOH(50%), 661.0 to 665.0 nm)
Drying loss max. 5.0 %
Properties (reference)
Maximum Absorption Wavelength 663(EtOH(50vol%)) nm
Solubility in water Soluble
Degree of solubility in water 43.6 g/l   25 °C
Solubility (soluble in) Chloroform
Solubility (slightly sol. in) Ethanol
Solubility (very slightly) Acetone
Solubility (insoluble in) Ether
Pictogram Pictogram Pictogram
Signal Word Danger
Hazard Statements H302 : Harmful if swallowed.
H315 : Causes skin irritation.
H319 : Causes serious eye irritation.
H361 : Suspected of damaging fertility or the unborn child.
H370 : Causes damage to organs.
H372 : Causes damage to organs through prolonged or repeated exposure.
H412 : Harmful to aquatic life with long lasting effects.
Precautionary Statements P273 : Avoid release to the environment.
P260 : Do not breathe dust/ fume/ gas/ mist/ vapours/ spray.
P201 : Obtain special instructions before use.
P264 : Wash skin thoroughly after handling.
P280 : Wear protective gloves/ protective clothing/ eye protection/ face protection.
P308 + P311 : IF exposed or concerned: Call a POISON CENTER/doctor.
Related Laws:
EC Number 200-515-2
RTECS# SO5600000
Transport Information:
HS Number 2934309090
PubMed Literature

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