107-82-4
1-bromo-3-methylbutane
CAS: 107-82-4
Molecular Formula: C5H11Br
107-82-4 - Names and Identifiers
| Name | 1-bromo-3-methylbutane |
| Synonyms | 1soamyl Bromide isoamyl bromide iso-Bromopentane iso-Pentyl bromide 3-METHYLBUTYL BROMIDE 3-Methylbutyl bromide 3-METHYL BROMO BUTANE 1-bromo-3-methylbutane 1-bromo-3-methyl-butan 1-BROMO-3-METHYLBUTANE ISO-AMYLBROMIDE(1-BROMO-3-METHYLBUTANE) 1-Bromo-3-methylbutane (contains 1-Bromo-2-methylbutene) |
| CAS | 107-82-4 |
| EINECS | 203-522-9 |
| InChI | InChI=1/C5H11Br/c1-5(2)3-4-6/h5H,3-4H2,1-2H3 |
| InChIKey | YXZFFTJAHVMMLF-UHFFFAOYSA-N |
107-82-4 - Physico-chemical Properties
| Molecular Formula | C5H11Br |
| Molar Mass | 151.04 |
| Density | 1.261g/mLat 25°C(lit.) |
| Melting Point | -112 °C |
| Boling Point | 120-121°C(lit.) |
| Flash Point | 90°F |
| Water Solubility | 0.2 g/L (16 ºC) |
| Solubility | H2O: slightly soluble at 16.5°C (0.02g/100ml) |
| Vapor Presure | 20mmHg at 25°C |
| Appearance | Liquid |
| Color | Clear colorless |
| Merck | 14,5114 |
| BRN | 773652 |
| Storage Condition | 2-8°C |
| Refractive Index | n20/D 1.4409(lit.) |
| Physical and Chemical Properties | Properties: colorless liquid melting point -112 ℃ boiling point 120.4 ℃ relative density 1.2071 refractive index 1.4420 solubility miscible with ethanol and ether, slightly soluble in water (16.5 ℃, solubility in water 0.02g/100ml) |
| Use | Used as an intermediate in organic synthesis |
107-82-4 - Risk and Safety
| Risk Codes | R10 - Flammable R22 - Harmful if swallowed R37/38 - Irritating to respiratory system and skin. R52/53 - Harmful to aquatic organisms, may cause long-term adverse effects in the aquatic environment. R51/53 - Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. R36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. S37/39 - Wear suitable gloves and eye/face protection S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S16 - Keep away from sources of ignition. |
| UN IDs | UN 2341 3/PG 3 |
| WGK Germany | 3 |
| RTECS | EJ6230000 |
| TSCA | Yes |
| HS Code | 29033036 |
| Hazard Class | 3 |
| Packing Group | III |
107-82-4 - Nature
Open Data Verified Data
colorless liquid. Melting Point -112 °c. Boiling point 120.4 °c. The relative density was 1. 2071. Refractive index 4420. It is miscible with ethanol and ether, and slightly soluble in water (solubility 0. 02g/lOOmL at 16.5 ℃).
Last Update：2025-06-10 22:55:16
107-82-4 - Preparation Method
Open Data Verified Data
isoamyl alcohol and hydrobromic acid were synthesized at 100~106 ℃. In the reaction tank, add isoamyl alcohol and hydrobromic acid according to the ratio of ingredients, stir and heat to 95~100 ℃, reflux for 1 hour, slowly add sulfuric acid at this temperature, and do not overflow hydrobromic acid, the reaction was carried out at 100 to 105 ° C. For 5 hours, followed by distillation, and the distillate was collected in a liquid separation tank. After washing with water, 5% to 7% sodium carbonate solution was added to adjust pH 8 to 9, the aqueous layer was removed, and then washed with water until pH 5 to 6. The washing liquid was separated and calcium chloride was added for dehydration. The product was obtained by distillation under reduced pressure at 21. 33-14. 66kPa to collect 118-122 ℃ fractions.
Last Update：2022-01-01 10:14:50
107-82-4 - Application
Open Data Verified Data
organic synthesis intermediates, used in the production of dyes, pharmaceuticals (such as barbiturate hypnotic agent).
Last Update：2025-08-19 16:24:40
107-82-4 - Safety
Open Data Verified Data
see 1,4-bromopentane. When the concentration is high, it will damage the liver and has anesthetic effect. The human body inhales LC50 21300mg/m3, and the intraperitoneal injection of ld50480 mg/kg,
Last Update：2025-06-10 22:55:16
107-82-4 - Reference Information
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Use | used as an intermediate in organic synthesis used as an intermediate in organic synthesis for the production of dyes, drugs (eg, barbiturates). for organic synthesis |
| production method | is obtained by reacting isoamyl alcohol with hydrobromic acid in the presence of sulfuric acid. Pentanol and hydrobromic acid were added to the reaction tank according to the ratio of ingredients, heated to 95-100 °c with stirring, and refluxed for 1H. At this temperature, sulfuric acid was slowly added, and the reaction was carried out at 100-106 ° C. For 1.5h so that hydrobromic acid did not overflow. By distillation, the distillate was collected in a liquid separation tank. After washing with water, a 5-7% sodium carbonate solution was added to adjust pH = 8-9, and the aqueous layer was separated and washed with water until the washing solution had pH = 5-6. The washing liquid was separated, calcium chloride was added for dehydration, and vacuum distillation was carried out to collect the product at 118-122 ° C. (21.3-14.7kPa), and the fraction was obtained, and the yield was 78% based on isoamyl alcohol. Industrial isopentyl bromide purity of more than 98%. Raw material consumption quota: isoamyl alcohol 792kg/t, bromine 900kg/t, sulfuric acid 750kg/t. |
| category | relatively flammable liquid |
| toxicity classification | micro |
| Acute toxicity | intraperitoneal-rat LD50: 6150 mg/kg; Intraperitoneal-mouse LD50: 420 mg/kg |
| flammability hazard characteristics | in case of fire, high temperature, oxidant flammable; toxic bromide gas from heat |
| storage and transportation characteristics | The warehouse is ventilated and dried at low temperature; It is stored separately from the oxidant |
| extinguishing agent | dry powder, dry sand, carbon dioxide, foam, 1211 extinguishing agent |
| Occupational Standard | SEL 0.5 mg/m3 |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-09 15:16:45
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