Pharmaceutical grade phenol carbolic acid chemical property use

Pharmaceutical grade phenol carbolic acid chemical properties use colorless needle-like crystals or white crystals
.
There is a special odor, and the extremely dilute solution has a sweet taste
.
Impure products become light red or red under the action of light and air, and change color faster in
case of alkali.
Rate 11 54178.
flash point 79.
44 °C (closed cup).
85 °C (open cup), spontaneous ignition point 715 °C, steam and air mixture combustion limit 1_ 7%~8.
6%.

Flammable and corrosive
.
Toxic.

1g of phenol is soluble in about 15mL of water (0.
67%, which can be dissolved in any proportion after heating at 25 °C), 12 mL of benzene
.
Soluble in ethanol, ethyl, chloroform, glycerin, carbon disulfide, petroleum jelly, volatile oil, fixed oil, strong alkali aqueous solution
.
Almost insoluble in petroleum ether
.
The pH value of the aqueous solution is about 6.
0 [Properties] This product is a colorless to reddish needle-like crystal or crystalline block; There is a special odor; hygroscopic; The aqueous solution is weakly acidic; When exposed to light or in the air, the color gradient darkens
.
This product is soluble in ethanol, ethyl, glycerin, fatty oil or volatile oil, soluble in water, slightly soluble
in liquid paraffin.
Freezing point The freezing point of this product (General rule 0613) is not less than 40 °C
.
[Identification] take 0.
1g of this product, add 10ml of water to dissolve, and test
according to the following method.
(1) Take 5ml of solution, add 1 drop of ferric chloride test solution, that is, blue-purple
.
(2) Take 5ml of the solution and add the bromine test solution to generate a white precipitate that dissolves instantaneously, but when the bromine test solution is excessive, a lasting precipitate
is generated.
(3) The infrared light absorption spectrum of this product should be consistent
with the control spectrum (spectral set 240 figure).
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