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CAS:125-20-2
MF:C28H30O4
EINECS:204-729-7
Purity:99%
Other Names:Thymolphthalein
what is of Thymolphthalein with cas 125-20-2?
Thymolphthalien is an acid-base indicator which is colourless in acidic form and deep blue in basic form. Acidic form retains hydrogen on each hydroxyl group. It is suitable in preparing disappearing ink.
Specification
|
Melting point
|
251-253 °C(lit.)
|
|
Boiling point
|
504.79°C (rough estimate)
|
|
density
|
0.92 g/mL at 25 °C
|
|
refractive index
|
1.6400 (estimate)
|
|
Fp
|
74 °F
|
|
storage temp.
|
no restrictions.
|
|
solubility
|
ethanol: clarity passes test
|
|
form
|
Low Melting Mass
|
|
pka
|
9.70, 10.0(at 25℃)
|
|
Specific Gravity
|
0.92
|
Usage
As pH indicator: colorless 9.3 to blue 10.5. Also as reagent for blood after decolorizing the alkaline solution by boiling with zinc dust.
Packing
25kgs/drum, 9tons/20’container
