C.I. 13020
Acid red 2 sodium salt
2-[4-(Dimethylamino)phenylazo]benzoic acid sodium salt
CAS 845-10-3
Assay 95%min
Packing 25kg/drum
Methyl Red sodium salt
| Name | Methyl Red sodium salt |
| Synonyms | C.I. 13020; Acid red 2 sodium salt |
| Molecular Structure | ![]() |
| Molecular Formula | C15H14N3NaO2 |
| Molecular Weight | 291.28 |
| CAS Registry Number | 845-10-3 |
| EC Number | 212-682-9 |
Specification:
Item | Specification |
Appearance | Brown-red powder |
PH ranges | pH 4.2 (red) to pH 6.2 (yellow) |
Solubility in ethanol | Pass |
Oxidated by bromine test | Pass |
Residue on ignition(as SO4),% | 20.5-24.0 |
Uses:
1.Acid base indicator:
Used for acid-base titration in chemical experiments, accurately determining the endpoint through color change (from red to yellow).
2.Microbial identification:
Used for methyl red test to identify bacterial types (such as distinguishing Escherichia coli) based on changes in the color of the culture medium.
3.Biological staining:
Can be used as a staining agent for biological samples, for microscopic observation.
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