Bromoethane

Athanor · official

C₂H₅Br · 108.97 g/mol

Also called ethyl bromide

Reagents

Open in Athanor

Drawn from its SMILES with RDKit

DangerHighly Flammable liquid and vapor · Harmful if swallowed · Harmful if inhaled · Suspected of causing cancer

Names and identifiers

IUPAC name: bromoethane
Synonyms: ethyl bromide, ETHYL BROMIDE, 1-Bromoethane
+ 36 more
Ethane, bromo-, Bromic ether, Monobromoethane, Hydrobromic ether, Bromure d'ethyle, Etylu bromek, Halon 2001, NCI-C55481, DTXSID6020199, NCI-554813, LI8384T9PH, NSC-8824, DTXCID60199, CHEBI:47232, Bromoethanum, RefChem:5617, 200-825-8, ethylbromide, Bromoethane-2-13C, Bromo-ethane, C2H5Br, NSC 8824, MFCD00000232, Etylu bromek [Polish], CCRIS 2504, HSDB 532, EINECS 200-825-8, UN1891, Bromoethane (ethyl bromide), UNII-LI8384T9PH, Bromodiborane, bromo ethane, AI3-04462, 1-bromethane, 2-ethyl bromide, 1-bromo ethane
Molecular formula: C₂H₅Br
Empirical formula: C₂H₅Br
Molecular weight: 108.97 g/mol
Exact mass: 107.95746
CAS number: 74-96-4
PubChem CID: 6332
Canonical SMILES: CCBr
Isomeric SMILES: CCBr
InChI: InChI=1S/C2H5Br/c1-2-3/h2H2,1H3
InChIKey: RDHPKYGYEGBMSE-UHFFFAOYSA-N
Molfile

Names, InChI and the identifiers from PubChem, retrieved 2026-10-14.

Physical properties

TemperaturePressureDensity

Appearance: Colorless to yellow liquid ... [Note: A gas above 101 degrees F][6]
6 values
From Hazardous Substances Data Bank (HSDB), the most authoritative source here.
Value As written Source
– Ethyl bromide appears as a colorless volatile liquid. Slightly soluble in water and denser than water. Flash point below 0 °F. Vapors are heavier than air. Toxic by inhalation. Irritates skin and eyes. Used to make pharmaceuticals and as a solvent. [1] CAMEO Chemicals
– Liquid [2] EPA Chemical Data Reporting (CDR)
– COLOURLESS LIQUID WITH CHARACTERISTIC ODOUR. [3] ILO-WHO International Chemical Safety Cards (ICSCs)
– Colorless to yellow liquid with an ether-like odor. [4] Occupational Safety and Health Administration (OSHA)
– Colorless to yellow liquid with an ether-like odor. [Note: A gas above 101 °F.] [5] The National Institute for Occupational Safety and Health (NIOSH)
–shown Colorless to yellow liquid ... [Note: A gas above 101 degrees F] [6] Hazardous Substances Data Bank (HSDB)cites NIOSH. NIOSH Pocket Guide to Chemical Hazards. Department of Health & Human Services, Centers for Disease Control & Prevention. National Institute for Occupational Safety & Health. DHHS (NIOSH) Publication No. 2010-168 (2010). Available from: https://www.cdc.gov/niosh/npg
Odor: ... Ether-like odor[6]
Melting point: -119 °C[3]
4 values
4 of 4 sources agree on it (most common value).
Value As written Source
−119 °C -182 °F (NTP, 1992) [1] CAMEO Chemicalscites National Toxicology Program, Institute of Environmental Health Sciences, National Institutes of Health (NTP). 1992. National Toxicology Program Chemical Repository Database. Research Triangle Park, North Carolina.
−119 °Cshown -119 °C [3] ILO-WHO International Chemical Safety Cards (ICSCs)
−119 °C -182 °F [4] Occupational Safety and Health Administration (OSHA)
−119 °C -182 °F [5] The National Institute for Occupational Safety and Health (NIOSH)
Boiling point: 38.4 °C (101.1 °F) at 760 mmHg (NTP, 1992)[1]
5 values
5 of 5 sources agree on it (most common value).
Value As written Source
38.4 °Cshown 101.1 °F at 760 mmHg (NTP, 1992) [1] CAMEO Chemicalscites National Toxicology Program, Institute of Environmental Health Sciences, National Institutes of Health (NTP). 1992. National Toxicology Program Chemical Repository Database. Research Triangle Park, North Carolina.
38.4 °C 38.4 °C [3] ILO-WHO International Chemical Safety Cards (ICSCs)
38 °C 101 °F [4] Occupational Safety and Health Administration (OSHA)
38.4 °C 38.4 °C @760 [mm Hg] [7] PAC Chemical Database, U.S. Department of Energy
38 °C 101 °F [5] The National Institute for Occupational Safety and Health (NIOSH)
Density: 1.451 @ 20°C[7]
5 values
4 of 5 sources agree on it (most common value).
Value As written Source
– 1.46 at 68 °F (NTP, 1992) - Denser than water [1] CAMEO Chemicalscites National Toxicology Program, Institute of Environmental Health Sciences, National Institutes of Health (NTP). 1992. National Toxicology Program Chemical Repository Database. Research Triangle Park, North Carolina.
– Relative density (water = 1): 1.4 [3] ILO-WHO International Chemical Safety Cards (ICSCs)
– 1.46 [4] Occupational Safety and Health Administration (OSHA)
–shown 1.451 @ 20°C [7] PAC Chemical Database, U.S. Department of Energy
– 1.46 [5] The National Institute for Occupational Safety and Health (NIOSH)
1 more value was reported but failed the checks (unreadable or out of range), so it is not shown.
Solubility in water: Solubility in water, g/100ml at 20 °C: 0.91[3]
4 values
From ILO-WHO International Chemical Safety Cards (ICSCs), the most authoritative source here.
Value As written Source
– less than 1 mg/mL at 61 °F (NTP, 1992) [1] CAMEO Chemicalscites National Toxicology Program, Institute of Environmental Health Sciences, National Institutes of Health (NTP). 1992. National Toxicology Program Chemical Repository Database. Research Triangle Park, North Carolina.
– In water, 9,000 mg/L at 25 °C [6] Hazardous Substances Data Bank (HSDB)cites Horvath AL; Halogenated Hydrocarbons. New York, NY: Marcel Dekker p. 610 (1999)
–shown Solubility in water, g/100ml at 20 °C: 0.91 [3] ILO-WHO International Chemical Safety Cards (ICSCs)
– 0.9% [5] The National Institute for Occupational Safety and Health (NIOSH)
log P: 1.61[3]
2 values
2 of 2 sources agree on it (most common value).
Value As written Source
– log Kow = 1.61 [6] Hazardous Substances Data Bank (HSDB)cites Hansch, C., Leo, A., D. Hoekman. Exploring QSAR - Hydrophobic, Electronic, and Steric Constants. Washington, DC: American Chemical Society., 1995., p. 4
–shown 1.61 [3] ILO-WHO International Chemical Safety Cards (ICSCs)
Vapor pressure: 400 [mmHg] @21 °C[7]
5 values
2 of 4 sources agree on it (most common value).
Value As written Source
375 mmHg 375 mmHg at 68 °F [1] CAMEO Chemicalscites National Toxicology Program, Institute of Environmental Health Sciences, National Institutes of Health (NTP). 1992. National Toxicology Program Chemical Repository Database. Research Triangle Park, North Carolina.
400 mmHg 400 mmHg at 70 °F (NTP, 1992) [1] CAMEO Chemicalscites National Toxicology Program, Institute of Environmental Health Sciences, National Institutes of Health (NTP). 1992. National Toxicology Program Chemical Repository Database. Research Triangle Park, North Carolina.
467 mmHg 467 mm Hg at 25 °C [6] Hazardous Substances Data Bank (HSDB)cites Daubert, T.E., R.P. Danner. Physical and Thermodynamic Properties of Pure Chemicals Data Compilation. Washington, D.C.: Taylor and Francis, 1989.
380 mmHg Vapor pressure, kPa at 20 °C: 51 [3] ILO-WHO International Chemical Safety Cards (ICSCs)
400 mmHgshown 400 [mm Hg] @21 °C [7] PAC Chemical Database, U.S. Department of Energy
2 more values were reported but failed the checks (unreadable or out of range), so they are not shown.
Flash point: -20 °C c.c.[3]
5 values
2 of 4 sources agree on it (most common value).
Value As written Source
−23 °C -10 °F (NTP, 1992) [1] CAMEO Chemicalscites National Toxicology Program, Institute of Environmental Health Sciences, National Institutes of Health (NTP). 1992. National Toxicology Program Chemical Repository Database. Research Triangle Park, North Carolina.
−20 °C -20 °C, -4 °F (Closed cup) [6] Hazardous Substances Data Bank (HSDB)cites National Fire Protection Association; Fire Protection Guide to Hazardous Materials. 14TH Edition, Quincy, MA 2010, p. 325-58
−20 °Cshown -20 °C c.c. [3] ILO-WHO International Chemical Safety Cards (ICSCs)
−23 °C -10 °F [4] Occupational Safety and Health Administration (OSHA)
< −16 °C <4 °F [5] The National Institute for Occupational Safety and Health (NIOSH)
Autoignition temperature: 511 °C[3]
3 values
3 of 3 sources agree on it (most common value).
Value As written Source
511 °C 952 °F (NTP, 1992) [1] CAMEO Chemicalscites National Toxicology Program, Institute of Environmental Health Sciences, National Institutes of Health (NTP). 1992. National Toxicology Program Chemical Repository Database. Research Triangle Park, North Carolina.
511 °C 952 °F (511 °C) [6] Hazardous Substances Data Bank (HSDB)cites National Fire Protection Association; Fire Protection Guide to Hazardous Materials. 14TH Edition, Quincy, MA 2010, p. 325-58
511 °Cshown 511 °C [3] ILO-WHO International Chemical Safety Cards (ICSCs)
Viscosity: 0.379 cP at 25 °C[6]

Value	As written	Source
–	Ethyl bromide appears as a colorless volatile liquid. Slightly soluble in water and denser than water. Flash point below 0 °F. Vapors are heavier than air. Toxic by inhalation. Irritates skin and eyes. Used to make pharmaceuticals and as a solvent.	[1] CAMEO Chemicals
–	Liquid	[2] EPA Chemical Data Reporting (CDR)
–	COLOURLESS LIQUID WITH CHARACTERISTIC ODOUR.	[3] ILO-WHO International Chemical Safety Cards (ICSCs)
–	Colorless to yellow liquid with an ether-like odor.	[4] Occupational Safety and Health Administration (OSHA)
–	Colorless to yellow liquid with an ether-like odor. [Note: A gas above 101 °F.]	[5] The National Institute for Occupational Safety and Health (NIOSH)
–shown	Colorless to yellow liquid ... [Note: A gas above 101 degrees F]	[6] Hazardous Substances Data Bank (HSDB)cites NIOSH. NIOSH Pocket Guide to Chemical Hazards. Department of Health & Human Services, Centers for Disease Control & Prevention. National Institute for Occupational Safety & Health. DHHS (NIOSH) Publication No. 2010-168 (2010). Available from: https://www.cdc.gov/niosh/npg

Value	As written	Source
−119 °C	-182 °F (NTP, 1992)	[1] CAMEO Chemicalscites National Toxicology Program, Institute of Environmental Health Sciences, National Institutes of Health (NTP). 1992. National Toxicology Program Chemical Repository Database. Research Triangle Park, North Carolina.
−119 °Cshown	-119 °C	[3] ILO-WHO International Chemical Safety Cards (ICSCs)
−119 °C	-182 °F	[4] Occupational Safety and Health Administration (OSHA)
−119 °C	-182 °F	[5] The National Institute for Occupational Safety and Health (NIOSH)

Value	As written	Source
38.4 °Cshown	101.1 °F at 760 mmHg (NTP, 1992)	[1] CAMEO Chemicalscites National Toxicology Program, Institute of Environmental Health Sciences, National Institutes of Health (NTP). 1992. National Toxicology Program Chemical Repository Database. Research Triangle Park, North Carolina.
38.4 °C	38.4 °C	[3] ILO-WHO International Chemical Safety Cards (ICSCs)
38 °C	101 °F	[4] Occupational Safety and Health Administration (OSHA)
38.4 °C	38.4 °C @760 [mm Hg]	[7] PAC Chemical Database, U.S. Department of Energy
38 °C	101 °F	[5] The National Institute for Occupational Safety and Health (NIOSH)

Value	As written	Source
–	1.46 at 68 °F (NTP, 1992) - Denser than water	[1] CAMEO Chemicalscites National Toxicology Program, Institute of Environmental Health Sciences, National Institutes of Health (NTP). 1992. National Toxicology Program Chemical Repository Database. Research Triangle Park, North Carolina.
–	Relative density (water = 1): 1.4	[3] ILO-WHO International Chemical Safety Cards (ICSCs)
–	1.46	[4] Occupational Safety and Health Administration (OSHA)
–shown	1.451 @ 20°C	[7] PAC Chemical Database, U.S. Department of Energy
–	1.46	[5] The National Institute for Occupational Safety and Health (NIOSH)

Value	As written	Source
–	less than 1 mg/mL at 61 °F (NTP, 1992)	[1] CAMEO Chemicalscites National Toxicology Program, Institute of Environmental Health Sciences, National Institutes of Health (NTP). 1992. National Toxicology Program Chemical Repository Database. Research Triangle Park, North Carolina.
–	In water, 9,000 mg/L at 25 °C	[6] Hazardous Substances Data Bank (HSDB)cites Horvath AL; Halogenated Hydrocarbons. New York, NY: Marcel Dekker p. 610 (1999)
–shown	Solubility in water, g/100ml at 20 °C: 0.91	[3] ILO-WHO International Chemical Safety Cards (ICSCs)
–	0.9%	[5] The National Institute for Occupational Safety and Health (NIOSH)

Value	As written	Source
–	log Kow = 1.61	[6] Hazardous Substances Data Bank (HSDB)cites Hansch, C., Leo, A., D. Hoekman. Exploring QSAR - Hydrophobic, Electronic, and Steric Constants. Washington, DC: American Chemical Society., 1995., p. 4
–shown	1.61	[3] ILO-WHO International Chemical Safety Cards (ICSCs)

Value	As written	Source
375 mmHg	375 mmHg at 68 °F	[1] CAMEO Chemicalscites National Toxicology Program, Institute of Environmental Health Sciences, National Institutes of Health (NTP). 1992. National Toxicology Program Chemical Repository Database. Research Triangle Park, North Carolina.
400 mmHg	400 mmHg at 70 °F (NTP, 1992)	[1] CAMEO Chemicalscites National Toxicology Program, Institute of Environmental Health Sciences, National Institutes of Health (NTP). 1992. National Toxicology Program Chemical Repository Database. Research Triangle Park, North Carolina.
467 mmHg	467 mm Hg at 25 °C	[6] Hazardous Substances Data Bank (HSDB)cites Daubert, T.E., R.P. Danner. Physical and Thermodynamic Properties of Pure Chemicals Data Compilation. Washington, D.C.: Taylor and Francis, 1989.
380 mmHg	Vapor pressure, kPa at 20 °C: 51	[3] ILO-WHO International Chemical Safety Cards (ICSCs)
400 mmHgshown	400 [mm Hg] @21 °C	[7] PAC Chemical Database, U.S. Department of Energy

Value	As written	Source
−23 °C	-10 °F (NTP, 1992)	[1] CAMEO Chemicalscites National Toxicology Program, Institute of Environmental Health Sciences, National Institutes of Health (NTP). 1992. National Toxicology Program Chemical Repository Database. Research Triangle Park, North Carolina.
−20 °C	-20 °C, -4 °F (Closed cup)	[6] Hazardous Substances Data Bank (HSDB)cites National Fire Protection Association; Fire Protection Guide to Hazardous Materials. 14TH Edition, Quincy, MA 2010, p. 325-58
−20 °Cshown	-20 °C c.c.	[3] ILO-WHO International Chemical Safety Cards (ICSCs)
−23 °C	-10 °F	[4] Occupational Safety and Health Administration (OSHA)
< −16 °C	<4 °F	[5] The National Institute for Occupational Safety and Health (NIOSH)

Value	As written	Source
511 °C	952 °F (NTP, 1992)	[1] CAMEO Chemicalscites National Toxicology Program, Institute of Environmental Health Sciences, National Institutes of Health (NTP). 1992. National Toxicology Program Chemical Repository Database. Research Triangle Park, North Carolina.
511 °C	952 °F (511 °C)	[6] Hazardous Substances Data Bank (HSDB)cites National Fire Protection Association; Fire Protection Guide to Hazardous Materials. 14TH Edition, Quincy, MA 2010, p. 325-58
511 °Cshown	511 °C	[3] ILO-WHO International Chemical Safety Cards (ICSCs)

Each value as its source reports it, with the source's number after it (listed under References). Where several sources report a property, the row shows the value most of them agree on, the rule the app uses; open the values to see every one.

Calculated

Heavy atoms: 3
Rings: 0
Aromatic rings: 0
Fraction sp³ carbons (Fsp3): 1
H-bond donors: 0
H-bond acceptors: 0
Rotatable bonds: 0
TPSA (Å²): 0
Formal charge: 0
XLogP3: 1.4 PubChem
Complexity: 2 PubChem
Stereocenters: None
Double-bond geometry: None specified
Point group: Cs of one 3D conformer with its hydrogens, by Athanor’s engine (as in the app)

Elemental analysis

C22.05%
H4.63%
Br73.33%

Isotope pattern

Each peak is a nominal mass with its abundance-weighted exact mass, as a percentage of the tallest, from IUPAC natural isotope abundances.

Computed from the structure with RDKit 2026.09 when this page was built, beside PubChem's own computed values from its record; where the two differ, both are shown.

Predicted

log P: 1.4 Crippen (Wildman and Crippen 1999)
log S (water solubility): -1.4 ESOL (Delaney 2004), log mol/L
Synthetic accessibility: 2.57 SA score, 1 easy to 10 hard (Ertl and Schuffenhauer 2009)

Drug-likeness: Lipinski’s rule of five

Molecular weight ≤ 500: 108.97
log P ≤ 5 (Crippen): 1.4
H-bond donors ≤ 5: 0
H-bond acceptors ≤ 10: 0

Passes all four rules.

¹³C NMR shifts, predicted

Predictions, not measurements; each names its method. A measured log P, where a source reports one, is under Physical properties.

Safety

Danger

Harmonized EU classification (CLP Annex VI). Source [8].

Flammable
Harmful or irritant
Health hazard

NFPA 704[6]

H225Highly Flammable liquid and vapor
H302Harmful if swallowed
H332Harmful if inhaled
H351Suspected of causing cancer

Precautionary statements: P203, P210, P233, P240, P241, P242, P243, P261, P264, P270, P271, P280, P301+P317, P303+P361+P353, P304+P340, P317, P318, P330, P370+P378, P403+P235, P405, P501

View all classifications (3)

[8] Regulation (EC) No 1272/2008 of the European Parliament and of the Council · DangerH225, H302, H332, H351
[9] European Chemicals Agency (ECHA) · 165 reports · DangerH225, H302+H332, H302, H332, H351, H420
[6] Hazardous Substances Data Bank (HSDB) · DangerH225, H302, H332, H351

Exposure limits

PEL-TWA (8-Hour Time Weighted Average): 200 ppm (890 mg/m³)[4]
PEL: TWA 200 ppm (890 mg/m3) See Appendix G[5]
REL-TWA (Time Weighted Average): 200 ppm[4]
REL-STEL (Short Term Exposure Limit): 250 ppm[4]
REL: See Appendix D[5]
TLV: 5 ppm as TWA; (skin); A3 (confirmed animal carcinogen with unknown relevance to humans).[3]

First aid

Eyes: First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes without specific instructions from a physician. Immediately transport the victim after flushing eyes to a hospital even if no symptoms (such as redness or irritation) develop. Skin: Immediately flood affected skin with water while removing and isolating all contaminated clothing.[1]
General First Aid: · Call 911 or emergency medical service. · Ensure that medical personnel are aware of the material(s) involved, take precautions to protect themselves and avoid contamination. · Move victim to fresh air if it can be done safely. · Administer oxygen if breathing is difficult. · If victim is not breathing: -- DO NOT perform mouth-to-mouth resuscitation; the victim may have ingested or inhaled the substance. -- If equipped and pulse detected, wash face and mouth, then give artificial respiration using a proper respiratory medical device (bag-valve mask, pocket mask equipped…[10]
(General first aid procedures) Eye: Irrigate immediately - If this chemical contacts the eyes, immediately wash (irrigate) the eyes with large amounts of water, occasionally lifting the lower and upper lids. Get medical attention immediately. Skin: Soap flush promptly - If this chemical contacts the skin, promptly flush the contaminated skin with soap and water. If this chemical penetrates the clothing, promptly remove the clothing and flush the skin with water. If irritation persists after washing, get medical attention. Breathing: Respiratory support Swallow: Medical attention immediately[5]
Fresh air, rest. Refer for medical attention.[3]

Storage

Fireproof. Separated from incompatible materials. Cool. Dry. Well closed. Ventilation along the floor.[3]
Keep container tightly closed in a dry and well-ventilated place. Containers which are opened must be carefully resealed and kept upright to prevent leakage. Light sensitive. Refrigerate before opening. Over time, pressure may increase causing containers to burst. Handle and open container with care.[6]

Incompatibilities

Incompatible materials: Carbon oxides, Hydrogen bromide gas.[6]
Chemically-active metals such as sodium, potassium, calcium, powdered aluminum, zinc & magnesium.[6]
The vigorous interaction of ethanol, phosphorus, and bromine to give bromoethane is considered too dangerous for a school experiment.[6]
Reacts with water or steam to produce toxic & corrosive fumes. Vigorous reaction with oxidizing materials.[6]

Safety data sheets on the supplier’s page: Clearsynth, SynHet - Synthetic Heterocycles, Biosynth.

Always read the supplier’s safety data sheet before working with it.

Spectra

Experimental spectra held by these sources; each link opens the source's own record.

Literature

Reading PubChem, OpenAlex and GSRS…

Bioactivity

Reading ChEMBL…

References

[1]CAMEO Chemicals · Public domain (NOAA) · via PubChem · retrieved 2026-10-14
[2]EPA Chemical Data Reporting (CDR) · Public domain (US EPA) · via PubChem · retrieved 2026-10-14
[3]ILO-WHO International Chemical Safety Cards (ICSCs) · CC BY 4.0 · via PubChem · retrieved 2026-10-14
[4]Occupational Safety and Health Administration (OSHA) · Public domain (US DOL) · via PubChem · retrieved 2026-10-14
[5]The National Institute for Occupational Safety and Health (NIOSH) · Public domain (US CDC) · via PubChem · retrieved 2026-10-14
[6]Hazardous Substances Data Bank (HSDB) · Public domain (US NLM) · via PubChem · retrieved 2026-10-14
[7]PAC Chemical Database, U.S. Department of Energy · Public domain (US DOE) · via PubChem · retrieved 2026-10-14
[8]Regulation (EC) No 1272/2008 of the European Parliament and of the Council · EU reuse policy, CC BY 4.0 · via PubChem · retrieved 2026-10-14
[9]European Chemicals Agency (ECHA) · ECHA legal notice: reuse with acknowledgement · via PubChem · retrieved 2026-10-14
[10]Emergency Response Guidebook (ERG) · Public domain (US DOT) · via PubChem · retrieved 2026-10-14
[11]NMRShiftDB · Linked only · via PubChem · retrieved 2026-10-14
[12]SpectraBase · Linked only · via PubChem · retrieved 2026-10-14
[13]MassBank of North America (MoNA) · CC BY 4.0 · via PubChem · retrieved 2026-10-14
[14]NIST Mass Spectrometry Data Center · Linked only · via PubChem · retrieved 2026-10-14
[15]MassBank Europe · Linked only · via PubChem · retrieved 2026-10-14
·Calculated values: computed by Athanor with RDKit 2026.09 from the structure.
·Literature on PubChem

Data last updated 2026-10-14.