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Sodium bromide, chemical formula NaBr or NaBr·2H2O. Colorless crystals (or powder), soluble in water, slightly soluble in alcohol. Very similar to sodium chloride. Low oral toxicity. The anhydrous form (NaBr) has a melting point of 747 °C and a boiling point of 1390 °C. It can be used to make silver bromide photosensitizers. Medically, it can be used as a sedative, hypnotic, or anticonvulsant. Industrially, sodium bromide can be used to produce bromine.
It is used in trace cadmium analysis chemistry, photographic plate making, and pharmaceuticals. Physicochemical properties: colorless cubic crystalline or white granular powder. Odorless, saline and slightly bitter in taste. Relative density 3.203 (25°C). Melting point 747°C. Hygroscopic in air. Easily soluble in water (solubility at 100°C is 121g/100ml water), aqueous solution is neutral. Slightly soluble in alcohol. Anhydrous sodium bromide crystallizes from the solution at 51°C, and dihydrate forms below 51°C. Its bromide ions can be replaced by chlorine.
Sodium bromide（cas 7647 15 6）, chemical formula NaBr, molecular weight 102.89, density 3.203 g/cm³ (25°C), relative density 3.203, refractive index 1.3614, is a colorless cubic crystalline or white granular powder. Odorless, salty and slightly bitter in taste. Its melting point is 747°C, and boiling point is 1390°C. Easily soluble in water, and the aqueous solution is neutral. Slightly soluble in alcohol. The solubility of sodium bromide in 100 grams of water is: 80.2g/0°C; 85.2g/10°C; 90.8g/20°C; 98.4g/30°C; 107g/40°C; 118g/60°C; 120g/80°C; 121g/90°C; 121g/100°C.
Under acidic conditions, this bromide chemical product can be oxidized by oxygen to release bromine. It can react with silver ions to form a light yellow solid, silver bromide. It can react with dilute sulfuric acid to form hydrobromic acid and can react with concentrated sulfuric acid to form bromine. It can also be displaced by chlorine gas to release bromine, which is one process of extracting bromine from seawater.
Store in a dark, sealed container. Sodium bromide is hygroscopic and can form lumps, making it difficult to use, so it is often stored in plastic bottles.
Used in photographic films, pharmaceuticals (sedatives), pesticides, fragrances, dyes, and other industries.
Prevent ingestion, inhalation, and avoid contact with eyes and skin. If ingested or inhaled, it can cause dizziness, nausea, and vomiting; see a doctor immediately. If splashed into the eyes, rinse immediately with fresh water for 20 minutes; if it contacts the skin, rinse with plenty of water.
