It is used as a pH indicator and as a tracking dye for DNA agarose gel electrophoresis. It can be used in its free acid form (light brown solid), or as a sodium salt (dark green solid). It is also an inhibitor of the prostaglandin E2 transport protein. Additional applications include use in sol-gel matrices,the detection ofammonia, and the measurement of albumin in human plasma and serum.
| Specification: | Requirements: | Results: |
| PH Change Range | 3.8(yellow green )-5.4(blue) | Passes test |
| Max absorption wavelength(nm) | λ1(PH3.8) 440-445 λ2(PH5.4) 615-618 | Passes test |
| Quality absorption coefficient(L/cm·g) | α1[λ1(PH3.8)] 24-28 α2[λ2(PH5.4)]53-58 | Passes test |
| Sulfated ash w/% | 0.25% max | 0.22% |
| Solubility in alcohol | Passes test | Passes test |
| Loss on drying w/% | 3.0% max | 2.1% |










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