Product Name: Methyl Red
Synonym: C.I. 13020; Acid Red 2; 2-[4-(Dimethylamino)phenylazo]benzoic acid
|Appearance||Shiny purple crystal or reddish brown powder|
|Maximum absorption wavelength，λ1 (PH4.5), nm||523~528|
|λ2 (PH6), nm||427~437|
|Mass absorption coefficient，
|λ2 (PH6.2), L/(cm·g)||≥ 70|
|PH domain color||4.5 (red) to 6.2 (yellow)|
|Ethanol dissolution test||Qualified|
|Loss on drying||≤ 1|
|Residue on ignition (Sulfate)||≤ 0.2|
Packing: 25kg/Bag; 25kg/Drum
Methyl red is one of the commonly used acid-base indicators, with the normal concentration of 0.1% ethanol solution and pH4.4 (red) – 6.2 (yellow). It is also used for live staining of protozoa.
Mainly used as PH indicator, absorption indicator.
Stored in a cool dry and ventilated place.