Colorless crystals or white powder, odorless and having a saline taste. Very soluble in water (1:0.55) and freely soluble in alcohol (1:2). ACTION AND USES: Practically identical with those of potassium iodide, but less disagreeable in taste; perhaps somewhat less irritating locally. DOSAGE: 0.3 Gm. or 5 grains (U.S.P.). =*Sodii Nitris (Sod. Nitris), Sodium Nitrite, U.S.P.=--NaNO{2}. Colorless crystals or white or nearly white masses, sticks or powder, odorless and having a mild saline taste. Deliquescent on exposure to air, being gradually converted into sodium nitrate. Freely soluble in water (1:1.5), but only sparingly soluble in alcohol. ACTION AND USES: Vasodilator, similar to nitroglycerin. The action is probably somewhat slower and more prolonged. DOSAGE: 0.06 Gm. or 1 grain (U.S.P.). =Sodii Perboras (Sod. Perbor.), Sodium Perborate, U.S.P.=--NaBO{3} + 4H{2}O (about 86.5%). Should contain not less than 9 per cent. of available oxygen. White, odorless granules or powder, having a saline taste. Soluble in water. ACTION AND USES: Antiseptic, deodorant and bactericide; in general, similar to hydrogen peroxide. DOSAGE: 0.06 Gm. or 1 grain (U.S.P.); may be applied as a dusting powder or in a 2 per cent. solution. =Sodii Phenolsulphonas (Sod. Phenolsulph.), Sodium Phenolsulphonate, U.S.P.= (Sodium Sulphocarbolate).--The hydrated salt. Colorless, odorless, somewhat efflorescent crystals or granules, having a cooling, saline bitter taste. Freely soluble in water (1:4.2), and only slightly soluble in alcohol (1:140). ACTION AND USES: Phenolsulphonates were introduced with the idea that they would be antiseptic like phenol, but less toxic. Actually, they are practically inert. DOSAGE: 0.25 Gm. or 4 grains (U.S.P.). =*Sodii Phosphas (Sod. Phos.), Sodium Phosphate, U.S.P.=--Na{2}HPO{4} + 12H{2}O, representing about 41.5 per cent. of the anhydrous salt. Colorless, odorless, efflorescent crystals or powder, having a cooling, saline taste. Freely soluble in water (1:2.7); insoluble in alcohol. ACTION AND USES: Saline cathartic, similar to magnesium and sodium sulphate. The taste is less disagreeable. DOSAGE: 4 Gm. or 1 drachm (U.S.P.). _Sodii Phosphas Exsiccatus (Sod. Phos. Exsic.), Exsiccated Sodium Phosphate, U.S.P._--Na{2}HPO{4}. White powder which absorbs moisture readily. Freely soluble in water (1:8.1), but insoluble in alcohol. DOSAGE: 2 Gm. or 30 grains (U.S.P.). _Liquor Sodii Phosphatis Compositus (Liq. Sod. Phos. Co.), Compound Solution of Sodium Phosphate, N.F._--Sodium phosphate (100%) and citric acid in glycerin and water. USES: Laxative. DOSAGE: 8 Cc. or 2 fluidrachms (N.F.).