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CAS RN: 122965-43-9 | Product Number: M0501

Methylene Blue Hydrate

Purity: >70.0%(W)
  • 3,7-Bis(dimethylamino)-5-phenothiazinium Chloride Hydrate
  • Basic Blue 9 Hydrate
4   9   ≥20 

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Product Number M0501
Purity / Analysis Method >70.0%(W)
Molecular Formula / Molecular Weight C__1__6H__1__8ClN__3S·xH__2O = 319.85  
Physical State (20 deg.C) Solid
CAS RN 122965-43-9
Related CAS RN 61-73-4
Reaxys Registry Number 3599847
PubChem Substance ID 87572543
Merck Index (14) 6060
Colour Index 52015
MDL Number


Appearance Green to Dark green powder to crystal
Purity(Gravimetric Method) min. 70.0 %(calcd.on dried substance)
Lambda max. 660.0 to 665.0 nm(EtOH(50%))
Absorbance(E1%1cm) min. 2000(EtOH(50%), 660.0 to 665.0 nm)
Drying loss max. 20.0 %
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 P501 : Dispose of contents/ container to an approved waste disposal plant.
P273 : Avoid release to the environment.
P260 : Do not breathe dust/ fume/ gas/ mist/ vapors/ spray.
P270 : Do not eat, drink or smoke when using this product.
P202 : Do not handle until all safety precautions have been read and understood.
P201 : Obtain special instructions before use.
P264 : Wash skin thoroughly after handling.
P280 : Wear protective gloves/ protective clothing/ eye protection/ face protection.
P307 + P311 : IF exposed: Call a POISON CENTER or doctor/ physician.
P337 + P313 : If eye irritation persists: Get medical advice/ attention.
P305 + P351 + P338 : IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
P302 + P352 : IF ON SKIN: Wash with plenty of soap and water.
P332 + P313 : If skin irritation occurs: Get medical advice/ attention.
P362 : Take off contaminated clothing and wash before reuse.
P301 + P312 + P330 : IF SWALLOWED: Call a POISON CENTER/doctor if you feel unwell. Rinse mouth.
P405 : Store locked up.
Related Laws:
RTECS# SO5600000
Transport Information:
HS Number 3204.13.8000
PubMed Literature

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