Methyl Red CAS 493-52-7
Dextran CAS 9004-54-0
18 9 月, 2020TRIS-(4-AMINOPHENYL)THIOPHOSPHATE CAS 52664-35-4
18 9 月, 2020
Methyl Red Typical Properties
| Item | Specifications |
| maximum absorption wavelength，λ1 （PH4.5）,nm |
523~528 |
| λ2（PH6.2）,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 |
Methyl Red Usage
Live protozoan staining; acid-base indicator, pH change range from 4.4 (red) to 6.2 (yellow); titration of ammonia, weak organic bases and alkaloids, but not suitable for organic acids other than oxalic acid and picric acid; can be combined with Chemicalbook Bromocresol green and methylene blue constitute a mixed indicator to shorten the color range and increase the sensitivity of the color change; adsorption indicator for precipitation titration, such as thorium nitrate titration of fluoride ion; verification of free chlorine, chlorite and other oxidants…
Methyl Red Package
25kg/fiber drum.
Methyl Red Storage
Treasury is ventilated, low temperature and dry;
What is the discoloration range of methyl red?
1.When its pH value is in the range of 4.6.2, it is orange.
2.When its pH value = 6.2, it is yellow. Because it is the color when it is close to the side with strong alkalinity, it is also called alkali color.