Water R

Purified water as defined in the monograph for Purified water.

Note: Unless otherwise specified, all solutions indicated in the tests and assays of The International Pharmacopoeia are prepared with water R.

Water, ammonia-free, R

Water that complies with the following additional test: to 50 mL add 2 mL of alkaline potassio-mercuric iodide TS; no colour is produced.

Water, carbon-dioxide-free and ammonia-free, R

Ammonia-free water R that has been treated as described under carbon-dioxide-free water R.

Water, carbon-dioxide-free, R

Water that has been boiled vigorously for a few minutes and protected from the atmosphere during cooling and storage.

Water, distilled R

Water R prepared by distillation.

Water for injections R

Water for injections as described in the monograph for Water for injections.

Water BET

Water is suitable if it gives a negative result under the conditions prescribed in 3.4 Test for bacterial endotoxins. It may be prepared by distilling water three times in an apparatus fitted with an effective device to prevent the entrainment of droplets, or by other means which give water of the requisite quality.

Water, particle-free R

Water R that has been filtered through a membrane with a pore size of 0.22 µm.

Water, sterile, R

Sterile water R that complies with the following additional test:

Pyrogens. Carry out the test as described under 3.5 Test for pyrogens injecting, per kg of the rabbit's weight, 10 mL of water that has been rendered isotonic by the addition of pyrogen-free sodium chloride R.

Water vapour detector tube

A cylindrical, sealed glass tube containing adsorbent filters and suitable supports for the magnesium perchlorate indicator. The minimum value indicated is 60 μL/L or less with a relative standard deviation of at most ±20%.