10035-10-6
Hydrobromic acid
CAS: 10035-10-6
Molecular Formula: BrH
10035-10-6 - Names and Identifiers
| Name | Hydrobromic acid |
| Synonyms | bromide acidobromidrico Hydrogen bromide Acido bromidrico Hydrobromic acid acidobromhidrico acidebromhydrique Acide bromhydrique anhydroushydrobromicacid acidebromhydrique(french) Hydrogen bromide solution Anhydrous hydrobromic acid Hydrobromicacidcolorlessliq Hydrogen bromide acetate solution hydrogen bromide cyl. with 2 L net~3.2kg |
| CAS | 10035-10-6 |
| EINECS | 233-113-0 |
| InChI | InChI:1S/BrH/h1H |
10035-10-6 - Physico-chemical Properties
| Molecular Formula | BrH |
| Molar Mass | 80.91 |
| Density | 1.49 g/mL at 25 °C (lit.) |
| Melting Point | −87°C(lit.) |
| Boling Point | −67°C(lit.) |
| Flash Point | 40°C |
| Water Solubility | soluble |
| Solubility | soluble |
| Vapor Presure | 334.7 psi ( 21 °C) |
| Vapor Density | 2.8 (vs air) |
| Appearance | Solution |
| Specific Gravity | 1.49 |
| Color | Light yellow, brown |
| Odor | Sharp, irritating odor detectable at 2 ppm |
| Exposure Limit | Ceiling limit 3 ppm (～10 mg/m3) (ACGIH);TLV-TWA 3 ppm (～10 mg/m3) (MSHA andOSHA). |
| Merck | 14,4778 |
| BRN | 3587158 |
| pKa | -9(at 25℃) |
| PH | 3.01(1 mM solution);2.04(10 mM solution);1.08(100 mM solution) |
| Storage Condition | Store below +30°C. |
| Stability | Stable. Incompatible with strong bases, strong oxidizing agents, ammonia, ozone, fluorine, water, metals. Air and light sensitive. |
| Sensitive | Hygroscopic |
| Refractive Index | n20/D 1.438 |
| Physical and Chemical Properties | Colorless or light yellow liquid, micro-smoking. |
| Use | For the manufacture of various bromine compounds, can also be used in medicine, dyes, spices and other industries |
10035-10-6 - Risk and Safety
| Risk Codes | R35 - Causes severe burns R37 - Irritating to the respiratory system R34 - Causes burns R10 - Flammable R36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S7/9 - S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. |
| UN IDs | UN 3265 8/PG 2 |
| WGK Germany | 1 |
| RTECS | MW3850000 |
| TSCA | Yes |
| HS Code | 28111990 |
| Hazard Class | 8 |
| Packing Group | II |
| Toxicity | LC50 in mice, rats: 814, 2858 ppm by inhalation, K. C. Back et al., Reclassification of Materials Listed as Transportation Health Hazards (TSA-20-72-3, PB 214-270, 1972) |
10035-10-6 - Upstream Downstream Industry
10035-10-6 - Nature
Open Data Verified Data
The product is an aqueous solution of hydrogen bromide, colorless or light yellow. Has a similar irritating odor as hydrochloric acid. Slight smoking. d20 1. 38; n ~ 01. 438. Exposure to air or sunlight causes a gradual darkening of the color due to free bromine. Hydrobromic acid has strong reduction, strong acid, micro-smoke. It can be oxidized by oxygen and other oxidants in the air to elemental bromine, and can react with methoxy to generate methyl bromide, and alkali to generate bromide, and amine to generate hydrobromide. Soluble in chlorobenzene, diethoxymethane organic solvent, can be miscible with water, alcohol or acetic acid. It has strong corrosion. The foaming agent was burned immediately in case of H. In the case of cyanide can produce highly toxic hydrogen cyanide gas. The reaction with the alkali metal can occur vigorously. With aliphatic amines, alkanolamines, alkenyl oxides, aromatic amines, amino compounds, ammonia, ammonium hydroxide, alkali, calcium oxide, epichlorohydrin, fluorine, isocyanate, fuming sulfuric acid, organic anhydride, sulfuric acid, sodium tetroborohydride, strong oxidant, vinyl acetate, water can not be combined. Corrosion of most metals, the formation of extremely flammable hydrogen. In addition to platinum, gold and tantalum and other metals, other metals are corrosion, the formation of metal bromide.
Last Update：2025-06-10 22:55:16
10035-10-6 - Preparation Method
Open Data Verified Data
sulfur dioxide was introduced into a mixture of water and bromine crushed ice. After completion of the reaction, the upper layer solution was separated, filtered, a small amount of bromine was added to remove excess sulfur dioxide, and then distilled to collect a fraction at 122 to 126 °c. If barium carbonate or barium hydroxide is added to the resulting hydrobromic acid, the S04-can be removed-. After standing and filtering, the mixture is distilled to collect a fraction at 122-125 ° C. To obtain hydrobromic acid with high purity.
Last Update：2025-06-10 22:55:16
10035-10-6 - Application
Open Data Verified Data
used as an analytical reagent for the determination of sulfur and selenium, the separation of tin from arsenic and antimony, and the determination of bismuth, zinc and iron. In medicine, it is used in the synthesis of sedatives and anesthetics; In the petrochemical industry as an alkylation catalyst; It is also a good solvent for metallic minerals and a basic raw material for the manufacture of various inorganic bromides and certain alkyl bromides.
Last Update：2025-08-19 16:24:40
10035-10-6 - Safety
Open Data Verified Data
rats were injected intravenously with LDso:76mg/kg; Rats inhaled th LCso:858 × 10-6, mice inhaled th LCso:814 × 10-6. Vapor strongly irritate the eyes and respiratory organs, inhalation or exposure to hydrofluoric acid, can cause skin, mucous membrane irritation or burns. Workers should be well protected, if accidentally touch the skin and eyes, should immediately rinse with flowing water. The working environment should be well ventilated. The material should be stored separately from H foaming agent, metal powder, flammable, combustible, alkali, etc. Mixed storage and transportation should not be avoided. Keep away from fire and heat source. Protection from direct sunlight.
Last Update：2025-06-10 22:55:16
10035-10-6 - Reference Information
| LogP | 0.629 at 25℃ |
| NIST chemical information | Information provided by: webbook.nist.gov (external link) |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| Overview | Bromine and hydrogen compounds are strong acids. Slightly fuming. The toxicity was low, and the median lethal concentration (inhalation in rats) was 2.858G/L/h. Long-term exposure, manifested as chronic respiratory irritation symptoms and digestive dysfunction. Easily soluble in organic solvents such as chlorobenzene and diethoxymethane. Can be miscible with water, alcohol and acetic acid. It is very corrosive and can react with all metals except platinum, gold, and tantalum to form metal bromide. The reducibility is also very strong, and it gradually turns yellow-brown due to bromine free in the air and sunlight. |
| application field | hydrogen bromide gas is a widely used gas in organic synthesis, from which a series of bromine products can be synthesized, such as nylon -11 monomer, dibromomethane, 1-bromopropane, β-bromoethylbenzene, etc. The latter products are important organic solvents, pesticides and pharmaceutical intermediates. In the past, due to the limitation of the process of synthesizing HBr gas, many bromide intermediates such as bromopropane, β-bromoethylbenzene, etc. all used the reaction of alcohol and hydrobromic acid. The process cost is relatively high, and there are many Low concentration of waste acid needs further treatment. If the method of adding HBr gas to olefin is adopted, the production cost can be greatly reduced. |
| use | 1. determination of sulfur, selenium, bismuth, zinc and iron. Separation of tin from arsenic and antimony, alkylation catalyst, reducing agent, organic synthesis, preparation of organic and inorganic bromides, high purity metal extraction. 2. It is used to manufacture various bromine compounds, and can also be used in medicine, dyes, fragrances and other industries; it is the manufacture of various inorganic bromides such as sodium bromide, potassium bromide, lithium bromide and calcium bromide, and certain alkyl Bromides The basic raw materials such as methyl bromide, ethane bromide, etc. It is used in medicine to synthesize sedatives and anesthetics. It is also a good solvent for some metal minerals, used for the extraction of high-purity metals. 3. The petroleum industry is used as an alkylation catalyst. Separating agents for alkoxy and phenoxy compounds, and catalysts for the oxidation of alicyclic hydrocarbons and chain hydrocarbons to ketones, acids or peroxides. 4. The pharmaceutical industry is used for synthetic sedatives and anesthetics and other medical supplies. It is the basic raw material for the manufacture of various inorganic bromides such as sodium bromide, potassium bromide, lithium bromide and calcium bromide, and certain alkyl bromides such as methyl bromide and ethane bromide. It is used in medicine to synthesize sedatives and anesthetics. It is also a good solvent for some metal minerals, used for the extraction of high-purity metals. The petroleum industry is used as a separating agent for alkoxy and phenoxy compounds, and a catalyst for the oxidation of alicyclic hydrocarbons and chain hydrocarbons to ketones, acids or peroxides. It is also used in synthetic dyes and spices. Used in the manufacture of inorganic and organic bromides; also used in the synthesis of fragrances, dyes, etc. Used for the extraction of high purity and the synthesis of bromide, and also used as an analytical reagent Determination of sulfur, selenium, bismuth, zinc and iron. Separation of tin from arsenic and antimony. Alkylation catalyst. Reducing agent. Organic synthesis. Preparation of organic and inorganic bromides. High purity metal refining. It is the basic raw material for the manufacture of various inorganic bromides such as sodium bromide, potassium bromide, lithium bromide and calcium bromide, and certain alkyl bromides such as methyl bromide and ethane bromide. It is used in medicine to synthesize sedatives and anesthetics. It is also a good solvent for some metal minerals, used for the extraction of high-purity metals. The petroleum industry is used as a separating agent for alkoxy and phenoxy compounds, and a catalyst for the oxidation of alicyclic hydrocarbons and chain hydrocarbons to ketones, acids or peroxides. It is also used in synthetic dyes and spices. It is used to manufacture various bromine compounds, and can also be used in medicine, dyes, fragrances and other industries for high-purity refining and bromide synthesis. It is also used as an analytical reagent for the manufacture of inorganic and organic bromides; it is also used to synthesize fragrances, dyes, etc. Used as an analytical reagent. Determination of sulfur and selenium, separation of tin from arsenic and antimony, determination of bismuth, zinc and iron, alkylation catalyst |
| Preparation process | The preparation method of hydrogen bromide gas is characterized in that it includes the following steps: According to the weight ratio of red phosphorus: concentrated hydrobromic acid: bromine = 1: 3.5~4.5: 6~7, select red phosphorus, concentrated hydrobromic acid and bromine; place red phosphorus and concentrated hydrobromic acid in a reaction container and stir at room temperature, bromine is added to the reactor from the constant pressure dropping device (the dropping end is below the liquid level) (that is, hydrogen bromide gas is released, and the rate of hydrogen bromide generation can be controlled by the dropping acceleration of bromine), The produced hydrogen bromide gas passes through a debromination tower and a drying tower to export dried hydrogen bromide gas. |
| toxicity | highly toxic. Gas or vapor has a pungent odor, which can irritate the eyes and respiratory system. Patients who inhale gas should be removed from the contaminated area, placed to rest and keep warm. If the eyes are polluted, rinse with a lot of water, serious cases must be treated by medical treatment. When the skin is polluted, rinse with a lot of water first. In severe cases, medical treatment is required. |
| production method | bromine and hydrogen are directly synthesized into hydrogen bromide in the presence of activated carbon catalyst. Then distill and purify to produce hydrogen bromide. Its Br2 H2 → 2HBr red phosphorus method first put red phosphorus into a water-containing reactor, slowly add bromine under stirring, and react to generate hydrobromic acid and phosphorous acid. Hydrobromic acid finished product is obtained by sedimentation, filtration and distillation. Its P4 6Br2 12H2O → 12HBr 4H3PO3 sulfur dioxide method passes sulfur dioxide into a reaction kettle with bromine and crushed ice, and keeps the temperature below 20 ℃ for reaction until the solution is yellow. The mixed solution is distilled, and the distilled solution is added to the barium hydroxide solution to react with the generated sulfuric acid to generate barium sulfate precipitation. After standing, filtering, removing the precipitate, and then distilling the filtrate, the finished hydrobromic acid product is obtained. Its Br2 SO2 2H2O → 2HBr HzSO4 |
| category | harmful gases |
| toxicity classification | poisoning |
| acute toxicity | inhalation-rat LC50: 2858 PPM/1 hour; Inhalation-mouse LC50: 814 PPM/1 hour |
| explosive hazard characteristics | blastable when mixed with air |
| flammability hazard characteristics | flammable in case of h-hole agent; toxic hydrogen cyanide gas in case of cyanide; thermal decomposition of toxic bromide gas |
| storage and transportation characteristics | warehouse ventilation and low temperature drying; Store separately from cyanide, h-porogen and alkali. |
| fire extinguishing agent | water |
| occupational standard | TWA 3 PPM (10 mg/m3) |
| DOT Classification | 2.3, Hazard Zone C (Gas poisonous by inhalation) |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
| immediate life-threatening and health concentration | 30 ppm |
Last Update：2024-04-09 19:05:09
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