NaBr
Sodium bromide
CAS: 7647-15-6
Molecular Formula: NaBr
NaBr - Names and Identifiers
| Name | Sodium bromide |
| Synonyms | NaBr BROMIDE NSC 77384 HSDB 5039 Sedoneural Bromnatrium Sodium bromide UNII-LC1V549NOM bromuredesodium sodiumbromide(nabr) Trisodium tribromide Sodium bromide [JAN] Bromnatrium [German] Sodium bromide (NaBr) Bromide salt of sodium BROMIDE STANDARD SOLUTION Hydrobromic acid sodium salt EPA Pesticide Chemical Code 013907 |
| CAS | 7647-15-6 |
| EINECS | 231-599-9 |
| InChI | InChI=1/BrH.Na/h1H;/q;+1/p-1 |
| InChIKey | JHJLBTNAGRQEKS-UHFFFAOYSA-M |
NaBr - Physico-chemical Properties
| Molecular Formula | NaBr |
| Molar Mass | 102.89 |
| Density | 3,203 g/cm3 |
| Melting Point | 755 °C (lit.) |
| Boling Point | 1390 °C |
| Flash Point | 1390°C |
| Water Solubility | 905 g/L (20 ºC) |
| Solubility | Soluble in water |
| Vapor Presure | 1 mm Hg ( 806 °C) |
| Appearance | White Crystalline powder |
| Specific Gravity | 3.21 |
| Color | White |
| Maximum wavelength(λmax) | ['λ: 260 nm Amax: 0.01', , 'λ: 280 nm Amax: 0.01'] |
| Merck | 14,8594 |
| BRN | 3587179 |
| PH | 5.74 (430g/l, H2O, 22.5℃) |
| Storage Condition | Store at room temperature. |
| Stability | Stable. Incompatible with strong acids. Hygroscopic. |
| Sensitive | Hygroscopic |
| Refractive Index | 1.6412 |
| MDL | MFCD00003475 |
| Physical and Chemical Properties | Properties colorless cubic crystal or white granular powder. Odorless, salty and slightly bitter. melting point 747 ℃ boiling point 1390 ℃ relative density 3.203(25 ℃) solubility soluble in water (solubility of 100g/mL of water at ℃). Slightly soluble in alcohol. |
| Use | Used in photographic film, medicine, perfume, dye and other industries |
NaBr - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | 36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S24/25 - Avoid contact with skin and eyes. S25 - Avoid contact with eyes. S36 - Wear suitable protective clothing. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S22 - Do not breathe dust. |
| WGK Germany | 1 |
| RTECS | VZ3150000 |
| FLUKA BRAND F CODES | 3 |
| TSCA | Yes |
| HS Code | 28275100 |
| Toxicity | LD50 orally in rats: 3.5 g/kg (Smith, Hambourger) |
NaBr - Upstream Downstream Industry
| Raw Materials | Sodium carbonate Urea Hydrobromic acid Sodium hydroxide Sodium hydroxide Sodium carbonate Bromine |
| Downstream Products | Phenethyl alcohol Styrene oxide Probenecid dyclonine hydrochloride |
NaBr - Reference
| Reference Show more | 1. Wen Longjia Deng Lin Xu Yan Yu et al. Photodegradation of dibromonitromethane under UV irradiation [J]. China Environmental Science 2020 v.40(05):257-262. 2. Jiang Shaojie, Huang Xue, Yuan Qiuhong, talking about Siying, Lai Yangzhou, Xiang Ping. Effect of pre-chlorination on the formation of Disinfection by-product NDMA from PDMDAAC [J]. Journal of Environmental Engineering, 2017,11(08):4621-4626. 3. [IF = 7.312] Wei Luo et al."Effective degradation of dimetridazol during the UV/chlorine process: Kinetics, pathways, and halonitromehanes formation. Sep Purif Technol. 2022 Jun;290:120792 |
NaBr - Nature
Open Data Verified Data
colorless cubic crystal or white granular powder, belonging to the equiaxed crystal system. Odorless, with slightly bitter taste. Melting point 755 °c I relative density 3. 21. In the air to absorb moisture and caking, but not deliquescent. Soluble in water, slightly soluble in ethanol. Its aqueous solution is neutral and has electrical conductivity. The bromide ion in sodium bromide can be replaced by fluorine and chlorine. It reacts with dilute sulfuric acid to generate hydrogen bromide, and reacts with concentrated sulfuric acid, concentrated nitric acid, and the like to oxidize to generate bromine. The dihydrate is formed when the temperature is higher than 51 °c. The dihydrate is a colorless monoclinic crystal.
Last Update：2024-01-02 23:10:35
NaBr - Preparation Method
Open Data Verified Data
The neutralization reaction of hydrobromic acid with sodium carbonate or sodium hydroxide gives sodium bromide. Or the soda ash, urea dissolved in hot water, into bromine, control the reaction temperature of about 80 deg C, reaction to generate sodium bromide.
Last Update：2022-01-01 08:59:09
NaBr - Introduction
Absorbed water caking but not deliquescent, the aqueous solution is nearly neutral. It has a salty or slightly bitter taste. Absorb moisture from the air clots but not deliquesce. Slightly volatilized at high temperatures. 1g dissolved in 1. 1ml of water, about 16ml of ethanol and 6ml of methanol. Its aqueous solution is nearly neutral, and its pH is 6.5-8-0.. Low toxicity, half lethal dose (rat, oral) 3500mg/kg. It's irritating.
Last Update：2022-10-16 17:28:30
NaBr - Use
Open Data Verified Data
It is used in the preparation of film photographic solution in the photosensitive industry, in the production of diuretics and sedatives in medicine, in the production of synthetic spices in the perfume industry, as a brominating agent in the printing and dyeing industry, and also in organic synthesis.
Last Update：2022-01-01 08:59:10
NaBr - Safety
Open Data Verified Data
packed in fibreboard barrels of inner village polyethylene plastic bag, 50kg net weight per barrel. Precautions for storage and transportation should be stored in a dry and ventilated warehouse, and the packaging should be complete, protected from light and moisture. Transport should be protected from rain and sun exposure, handling should be light, to prevent the package
The packing was broken. In case of fire, it can be suppressed by water and various fire-retardants. To prevent ingestion, inhalation, to prevent the eyes, skin and contact. If ingested or inhaled, dizziness will occur, Nausea, Vomit, please immediately call a doctor for treatment; If splash into the eyes, immediately rinse with fresh water for 20min; Skin contact with sodium bromide, it should also be rinsed with plenty of water.
Last Update：2022-01-01 10:59:21
NaBr - Reference Information
| LogP | 0 at 25℃ |
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| physical and chemical properties | at room temperature, sodium bromide is a colorless cubic crystal or white granular powder, belonging to the equiaxed crystal system, no odor, taste alkali and slightly bitter, highly toxic. In the air to absorb water and caking, but not deliquescent, slightly soluble in alcohol, soluble in water (100 deg C 100ml water solubility of 12ig), the aqueous solution is neutral, conductivity. 51 deg C precipitation in the solution of anhydrous sodium bromide crystals, less than 51 deg C to produce two water. Its bromide ion can be replaced by fluorine, chlorine. Under acidic conditions, can be oxidized by oxygen, free bromine, industrial use of this characteristic to bromine. It can react with dilute sulfuric acid to generate hydrogen bromide. However, hydrobromic acid is a strong acid, which cannot be prepared by the reaction of dilute sulfuric acid. Only high boiling point acid can be used to prepare low boiling point acid, but concentrated sulfuric acid cannot be used because concentrated sulfuric acid has strong oxidizing property, oxidation of -1 valence of bromine to bromine, the release of red-brown gas, this method can be used to identify sodium iodide (sodium iodide and concentrated sulfuric acid heating, the release of purple gas), therefore, only concentrated phosphoric acid and sodium bromide can be used to prepare hydrogen bromide by solid heating. bromide can strengthen the inhibition process of cerebral cortex, And promote its concentration. They can be used medically as tranquilizers, hypnotics, or anticonvulsants. When the compound is swallowed or inhaled by a person, it can cause damage to the central nervous system, brain, and eyes, and can also cause irritant reactions in the skin, eyes, and respiratory tract. |
| adverse reactions | adverse reactions after taking sodium bromide include: individual patients will appear rash, exfoliative dermatitis, and may appear drowsiness, dizziness, asthma and other reactions, after stopping the above reactions will disappear, overdose will cause lethargy. And the medication should pay attention to not suddenly stop, otherwise it will cause status epilepticus or rebound. In addition, overdose or serious adverse reactions, should immediately see a doctor. Generally, it is disabled for allergic patients, and it is disabled for people with severe liver, kidney and lung dysfunction. It is disabled for patients with bronchial asthma, craniocerebral injury, respiratory depression and other diseases, and it is disabled for pregnant women and lactating women. |
| solubility in water (g/100ml) | grams dissolved per 100ml of water at different temperatures (℃): 80.2g/0 ℃;85.2g/10 ℃;90.8g/20 ℃;98.4g/30 ℃;107g/40 ℃ 118g/60 ℃;120g/80 ℃;121g/90 ℃;121g/100 ℃ |
| toxicity | to prevent ingestion, inhalation, to prevent the eyes, skin and contact. If the intake, inhalation, Vertigo will occur, Nausea, Vomit, immediately consult a doctor. If splash in the eyes, immediately rinse with fresh water for 20 min; Skin contact with sodium bromide, also use a lot of water rinse. |
| preparation process | According to the use of different raw materials, can be divided into two types: one process is the use of sodium hydroxide and hydrobromic acid reaction; the second is the reaction of sodium carbonate with hydrobromic acid. Reaction process (with NaOH as an example): about 40% of the hydrobromic acid is added to the reactor, slowly adding 40% caustic soda solution under stirring for neutralization, and sodium bromide is formed at pH7.5 ~ 8, the sodium bromide product was prepared by centrifugal separation after crystallization. Overall reaction equation, method (1)HBr + NaOH → NaBr + H2O; Method (2)HBr + Na2CO3 → NaBr + H2O + CO2. |
| Use | used as a raw material for the preparation of film photographic solution, a sedative in medicine, and a brominating agent in printing and dyeing industry, also used in the synthesis of fragrances and other chemicals the photographic industry is used in the preparation of film photographic solutions. It is used in medicine for the production of diuretics and sedatives. The perfumery industry is used in the production of synthetic fragrances. Used as a brominating agent in the printing and dyeing industry. In addition, it is also used in organic synthesis and so on. used in photosensitive industry, perfume, medicine and printing and dyeing industry. used as analytical reagent, also used in the synthesis of inorganic and organic compounds and pharmaceutical industry used in photographic film, medicine, perfume, dye and other industries trace determination of cadmium. Manufacture of bromide. Inorganic and organic synthesis. Photographic plate. Pharmaceutical. |
| production method | urea reduction method soda ash (sodium carbonate) and urea are dissolved in hot water and fed to the reactor, the reaction was carried out by slow addition of bromine to form sodium bromide. Then add activated carbon decolorization, after filtration, evaporation crystallization, centrifugal separation, drying, prepared sodium bromide product. 3Br2 3Na2CO3 NH2CONH2 → 6NaBr 4CO2 ↑n2 ↑2h2o neutralization method add about 40% hydrobromic acid to the reactor, slowly add 40% caustic soda solution under stirring for neutralization, and form sodium bromide at Ph7.5 ~ 8, the sodium bromide product was prepared by centrifugal separation, evaporation, crystallization and centrifugal separation. HBr NaOH→NaBr H2O |
| category | toxic substances |
| toxicity grade | poisoning |
| Acute toxicity | oral-rat LD50 3500 mg/kg; Oral-mouse LD50: 7000 mg/kg |
| flammability hazard characteristics | non-combustible; Toxic sodium oxide, bromide smoke |
| storage and transportation characteristics | warehouse low temperature, ventilation, dry |
| fire extinguishing agent | water, carbon dioxide, dry powder, foam |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-06-04 12:18:46
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Raw Materials for NaBr
Downstream Products for NaBr