Product Name: Methyl Red
Synonym: C.I. 13020; Acid Red 2; 2-[4-(Dimethylamino)phenylazo]benzoic acid
Molecular Structure:
Specifications:
| Item | Specifications |
| CAS No. | 493-52-7 |
| Molecular Formula | C15H15N3O2 |
| Molecular Weight | 269.30 |
| 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，
λ1(PH4.5), L/(cm·g) |
≥ 130 |
| 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
Function:
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.
Application:
Mainly used as PH indicator, absorption indicator.
Storage:
Stored in a cool dry and ventilated place.
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