Normal oxyquinolin sulphate. A non-toxic antiseptic much stronger than phenol, acting in solutions as dilute as 1:10,000. A feeble germicide, and does not coagulate albumin; is deodorant and analgesic. Dose for internal use, 5 grains. As an antiseptic it is used in an average strength of 1:1,000; as a nasal spray or douche, 1:3,000; as an eye-wash, 1:4,000, gradually increasing strength; maximum strength in any case tolerating it, 1:100.