Preparation of Alcohol (Ethanol), 95% v/v

Preparation of Alcohol (Ethanol), 95% v/v

Reagent:

To make 100 ml:

Ethanol, absolute ………………………………….. 95 ml
Distilled water …………………………………………. 5 ml


Method:

1) Using a 100 ml cylinder, measure 95 ml of absolute ethanol.
Caution: Absolute ethanol is highly flammable, therefore use it well away from an open flame.

2) Add 5 ml of water, i.e. to the 100 ml mark.

3) Transfer to a leak-proof bottle and mix well.

4) Label the bottle and mark it Flammable.

Store at room temperature in a safe place.

The reagent is stable indefinitely.

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