4
Table I—contd.
| Quinine preparations. | Percentage of anhydrous Quinine base. |
Solubility of 1 part in parts of cold water. |
Reaction of solution. |
REMARKS. |
| Q. bi hydrobromide | 60.0 | 7 | Faintly acid | Recommended for hypoder- mic injection. |
| Q. urea (carbamide) | 70.0 | 1 | ditto | Recommended for hypoder- mic injection. |
| Q. hydrochloride | 81.7 | 37 | Neutral | |
| Q. sulphate | 72.8 | 800 | ditto | |
| Q. lactate | 75.0 | 10 | ditto | Recommended for hypoder- mic injection. |
| Q. hydrobromide | 76.6 | 45 | ditto | Recommended for hypoder- mic injection. |
| Q. cacodylate | 62.0 | under 10 | ditto | |
| Q. phosphate | 76.5 | 784 | ditto | Acicular crystals like the sulphate but harder and denser. |
| Q. quinate | 58.7 | under 10 | ditto | Recommended for hypoder- mic injection. |
| Q acetate | 84.3 | over 2,000 | ditto | |
| Q. carbonate | 80.2 | over 2,000 | ditto | |
| Q tartrate | 79.4 | 1,000 | ditto | |
| Q. tannate | 31.0 | over 2,000 | ditto | Composition stated to be very variable. |
| Q. salicylate | 68.8 | 2,30 | ditto | |
| Q. arsenate (basic) | 68.0 | over 2,000 | ditto | |
| Q. arsenite | 85.0 | over 2,000 | ditto | |
| Q. valerianate | 75.8 | 100 | ditto | |
| Q. benzoate | 72.6 | 373 | ditto | |
| Q formate (basic) | 87.5 | under 20 | ditto | Recommended for hypoder- mic injection. |
| Q. alkaloid | 85.7 | 1,670 | Feebly basic |
Practically all of these Quinine preparations require to be kept in well
stoppered bottles, because of the readiness with which they part with water of
crystallisation or take up moisture from the atmosphere. They also require