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Cresol Purple
Chemical Name |
Cresol Purple |
Another name |
m-Cresol Purple |
CAS No. |
2303-01-7 |
Molecular formula |
C21H18O5S |
EINECS No. |
218-960-6 |
Molecular weight |
382.43 |
Molecular Structure |
|
Details |
Appearance: Tiny brown crystal powder pH change range: 1.2(pink)~2.8(yellow); 7.4(brownish yellow)~9.0(purple). Max Absorption wavelength(nm): λ1(PH1.2) 526-529; λ2(PH2.8) 431-437; λ3(PH7.4) 431-437; λ4(PH9.0) 576-580. Mass absorption coefficient L/(cm·g) α(λ1,PH1.2, Dry sample) 80-94; α(λ2,PH2.8, Dry sample) 40-46; α(λ3, PH7.4, Dry sample) 39-45; α(λ4,PH9.0, Dry sample) 75-86. Solubility in Ethanol: Pass Loss on drying: 1.0% max. |
Main Application |
A sulfonylurea indicator, used as pH indicator. |
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