Basic Blue 9/ Methylene blue/ 61 73 4/ 7220 79 3

Items

Technical index 

Product name

Methylene blue, Basic Blue 9

Synonym

Swiss blue

Appearance

Green fine crystalline powder

Methylene blue(C₁₆H₁₈ClN₃S)

98.0%min

Indicator range

Qualified

Loss on drying

15.0%max

Residue on ignition (as sulfate)

0.5%max

As

0.0005%max

Zn

0.02%max

Cu

0.03%max

Methanol-soluble test

qualified