| I.— | Iodine | 1 av. ounce |
|---|---|---|
| Oleic acid | 1 fluidounce | |
| Alcohol | 6 fluidrachms | |
| Stronger water of ammonia | 2 fluidrachms |
This makes a soapy paste soluble in all liquids, except fixed oils.
| II.— | Iodine | 1 av. ounce |
|---|---|---|
| Oleic acid | 2 fluidounces | |
| Stronger water of ammonia | 3 fluidrachms | |
| Paraffine oil, colorless, to make | 20 fluidounces | |
| III.— | Iodine | 1 av. ounce |
| Alcohol | 5 fluidounces | |
| Solution of ammonium oleate | 1 fluidounce | |
| Glycerine to make | 20 fluidounces |
The solution of ammonium oleate is made from oleic acid and spirit of ammonia.
Liquid Soaps.
If an antiseptic soap is wanted the addition of a small amount of benzoic acid, formaldehyde, or corrosive sublimate will give the desired product. Liquid soaps should contain from 20 to 40 per cent of genuine white castile soap and about 2 to 2 1/4 per cent of potassium carbonate.
This is a common formula:
| By weight | ||
|---|---|---|
| I.— | Olive or cottonseed oil | 60 parts |
| Caustic potash, U.S.P. | 15 parts | |
| Alcohol and water, sufficient of each. | ||
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Dissolve the potash in 1 ounce of water, heat the oil on a water bath, add the solution of potash previously warmed, and stir briskly. Continue the heat until saponification is complete. If oil globules separate out and refuse to saponify, the potash is not of proper strength, and more must be added—1 or 2 parts dissolved in water. If desired transparent add a little alcohol, and continue the heat without stirring until a drop placed in cold water first solidifies and then dissolves.