Names and identifiers
- IUPAC name
- benzoyl chloride
- Synonyms
- BzCl, Benzenecarbonyl chloride, Benzoic acid, chloride
+ 35 more
alpha-Chlorobenzaldehyde, benzoic acid chloride, DTXSID9026631, Benzaldehyde, alpha-chloro-, VTY8706W36, DTXCID106631, CHEBI:82275, RefChem:5591, 202-710-8, Benzoylchloride, a-Chlorobenzaldehyde, BenzoylChloride-13C7, Benzoyl Chloride-13C6, MFCD00000653, Benzaldehyde, .alpha.-chloro-, benzoyl-carbonyl-13c chloride, benzoylchlorid, CCRIS 802, Benzoyl chloride, ReagentPlus(R), >=99%, HSDB 383, EINECS 202-710-8, UN1736, BRN 0471389, benzoyl chlorid, benzoyl choride, bezoyl chloride, UNII-VTY8706W36, benzoic chloride, benzoyl chloride-, PhCOCl, Bz-Cl, Benzoyl chloride [UN1736] [Corrosive], .alpha.-Chlorobenzaldehyde, Benzaldehyde, |A-chloro-, EC 202-710-8
- Molecular formula
- C7H5ClO
- Empirical formula
- C7H5ClO
- Molecular weight
- 140.56 g/mol
- Exact mass
- 140.00289
- CAS number
- 98-88-4
- PubChem CID
- 7412
- Canonical SMILES
- C1=CC=C(C=C1)C(=O)Cl
- Isomeric SMILES
- C1=CC=C(C=C1)C(=O)Cl
- InChI
- InChI=1S/C7H5ClO/c8-7(9)6-4-2-1-3-5-6/h1-5H
- InChIKey
- PASDCCFISLVPSO-UHFFFAOYSA-N
- Molfile
Names, InChI and the identifiers from PubChem, retrieved 2026-10-14.
Physical properties
- Appearance
- Colorless, fuming liquid[5]
7 values
From Hazardous Substances Data Bank (HSDB), the most authoritative source here.
Value As written Source – Benzoyl chloride appears as a colorless fuming liquid with a pungent odor. Flash point 162 °F. Lachrymator, irritating to skin and eyes. Corrosive to metals and tissue. Density 10.2 lb / gal. Used in medicine and in the manufacture of other chemicals. [1] CAMEO Chemicals – CBI; Liquid [2] EPA Chemical Data Reporting (CDR) – FUMING COLOURLESS LIQUID WITH PUNGENT ODOUR. [3] ILO-WHO International Chemical Safety Cards (ICSCs) – A colorless fuming liquid with a pungent odor. [4] Occupational Safety and Health Administration (OSHA) – Transparent, colorless liquid [5] Hazardous Substances Data Bank (HSDB)cites Larranaga, M.D., Lewis, R.J. Sr., Lewis, R.A.; Hawley's Condensed Chemical Dictionary 16th Edition. John Wiley & Sons, Inc. Hoboken, NJ 2016., p. 157 –shown Colorless, fuming liquid [5] Hazardous Substances Data Bank (HSDB)cites NOAA; CAMEO Chemicals. Database of Hazardous Materials. Benzoyl chloride (98-88-4). Natl Ocean Atmos Admin, Off Resp Rest; NOAA Ocean Serv. Available from, as of Oct 20, 2017: https://cameochemicals.noaa.gov/ – Colorless to slightly yellow liquid [5] 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
- Fuming pungent[5]
2 values
From Hazardous Substances Data Bank (HSDB), the most authoritative source here.
Value As written Source –shown Fuming pungent [5] Hazardous Substances Data Bank (HSDB)cites Lewis, R.J. Sr. (ed) Sax's Dangerous Properties of Industrial Materials. 12th Edition. Wiley-Interscience, Wiley & Sons, Inc. Hoboken, NJ. 2012., p. V2: 492 – Pungent, aromatic [5] 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 - Melting point
- -1.0 °C (30.2 °F, NTP 1992)[1]
4 values
4 of 4 sources agree on it (most common value).
Value As written Source −1.0 °Cshown 30.2 °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. −1 °C -1 °C [3] ILO-WHO International Chemical Safety Cards (ICSCs) −1.0 °C 30.2 °F [4] Occupational Safety and Health Administration (OSHA) −0.5 °C -0.5 °C [6] PAC Chemical Database, U.S. Department of Energy - Boiling point
- 197.2 °C[3]
4 values
4 of 4 sources agree on it (most common value).
Value As written Source 197 °C 387 °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. 197.2 °Cshown 197.2 °C [3] ILO-WHO International Chemical Safety Cards (ICSCs) 197 °C 387 °F [4] Occupational Safety and Health Administration (OSHA) 197 °C 197 °C @760 [mm Hg] [6] PAC Chemical Database, U.S. Department of Energy - Density
- 1.211 at 25 °C (77 °F) (USCG, 1999) - Denser than water[1]
4 values
4 of 4 sources agree on it (most common value).
Value As written Source –shown 1.211 at 77 °F (USCG, 1999) - Denser than water [1] CAMEO Chemicalscites U.S. Coast Guard. 1999. Chemical Hazard Response Information System (CHRIS) - Hazardous Chemical Data. Commandant Instruction 16465.12C. Washington, D.C.: U.S. Government Printing Office. – Relative density (water = 1): 1.21 [3] ILO-WHO International Chemical Safety Cards (ICSCs) – 1.211 [4] Occupational Safety and Health Administration (OSHA) – 1.22 @ 15°C [6] PAC Chemical Database, U.S. Department of Energy - Solubility in water
- Solubility in water: reaction[3]
3 values
From ILO-WHO International Chemical Safety Cards (ICSCs), the most authoritative source here.
Value As written Source – Decomposes (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. – Soluble in ether and carbon disulfide [5] Hazardous Substances Data Bank (HSDB)cites Larranaga, M.D., Lewis, R.J. Sr., Lewis, R.A.; Hawley's Condensed Chemical Dictionary 16th Edition. John Wiley & Sons, Inc. Hoboken, NJ 2016., p. 157 –shown Solubility in water: reaction [3] ILO-WHO International Chemical Safety Cards (ICSCs) - Vapor pressure
- VP: 1 mmHg at 32.1 °C[5]
6 values
3 of 4 sources agree on it (most common value).
Value As written Source 0.4 mmHg 0.4 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. 1 mmHg 1 mmHg at 89.8 °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. 1 mmHgshown VP: 1 mm Hg at 32.1 °C [5] Hazardous Substances Data Bank (HSDB)cites Lewis, R.J. Sr. (ed) Sax's Dangerous Properties of Industrial Materials. 12th Edition. Wiley-Interscience, Wiley & Sons, Inc. Hoboken, NJ. 2012., p. V2: 492 0.7 mmHg 0.700 mm Hg at 25 °C, extrapolated [5] Hazardous Substances Data Bank (HSDB)cites Perry RH, Green D; Perry's Chemical Engineer's Handbook. Physical and Chemical Data. New York, NY: McGraw-Hill 7th ed p. 2-61 (1997) 0.38 mmHg Vapor pressure, Pa at 20 °C: 50 [3] ILO-WHO International Chemical Safety Cards (ICSCs) 1 mmHg 1 [mm Hg] @32.1 °C [6] PAC Chemical Database, U.S. Department of Energy 1 more value was reported but failed the checks (unreadable or out of range), so it is not shown.
- Flash point
- 72 °C (162 °F)(open cup)[5]
6 values
4 of 4 sources agree on it (most common value).
Value As written Source 72 °C 162 °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. 72 °C 72 °C (162 °F) - closed cup [5] Hazardous Substances Data Bank (HSDB)cites Sigma-Aldrich; Safety Data Sheet for Benzoyl chloride. Product Number: 259950, Version 4.10 (Revision Date 06/02/2016). Available from, as of October 5, 2017: https://www.sigmaaldrich.com/safety-center.html 72 °Cshown 162 °F (72 °C)(open cup) [5] Hazardous Substances Data Bank (HSDB)cites National Fire Protection Association; Fire Protection Guide to Hazardous Materials. 14TH Edition, Quincy, MA 2010, p. 325-18 68 °C 68 °C (closed cup) [5] Hazardous Substances Data Bank (HSDB)cites EPA/Office of Pollution Prevention and Toxics; High Production Volume (HPV) Challenge Program's Robust Summaries and Test Plans. Benzoyl Chloride. 72 °C 72 °C c.c. [3] ILO-WHO International Chemical Safety Cards (ICSCs) 72 °C 162 °F [4] Occupational Safety and Health Administration (OSHA) - Autoignition temperature
- 197.2 °C[3]
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
- 9
- Rings
- 1
- Aromatic rings
- 1
- Fraction sp³ carbons (Fsp3)
- 0
- H-bond donors
- 0
- H-bond acceptors
- 1
- Rotatable bonds
- 1
- TPSA (Ų)
- 17.1
- Formal charge
- 0
- XLogP3
- 2.9 PubChem
- Complexity
- 105 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
- C59.81%
- H3.59%
- Cl25.22%
- O11.38%
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
- 2.07 Crippen (Wildman and Crippen 1999)
- log S (water solubility)
- -2.44 ESOL (Delaney 2004), log mol/L
- Synthetic accessibility
- 1.49 SA score, 1 easy to 10 hard (Ertl and Schuffenhauer 2009)
Drug-likeness: Lipinski’s rule of five
- Molecular weight ≤ 500: 140.57
- log P ≤ 5 (Crippen): 2.07
- H-bond donors ≤ 5: 0
- H-bond acceptors ≤ 10: 1
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 [7].
Corrosive
Harmful or irritant
- H302Harmful if swallowed
- H312Harmful in contact with skin
- H314Causes severe skin burns and eye damage
- H317May cause an allergic skin reaction
- H332Harmful if inhaled
Precautionary statements: P260, P261, P264, P270, P271, P272, P280, P301+P317, P301+P330+P331, P302+P352, P302+P361+P354, P304+P340, P305+P354+P338, P316, P317, P321, P330, P333+P317, P362+P364, P363, P405, P501
View all classifications (3)
- [7] Regulation (EC) No 1272/2008 of the European Parliament and of the Council · DangerH302, H312, H314, H317, H332
- [8] European Chemicals Agency (ECHA) · 523 reports · DangerH302, H311, H312, H314, H317, H318, H330, H331, H332
- [5] Hazardous Substances Data Bank (HSDB) · DangerH227, H302, H312, H314, H317, H318, H332, H402
Exposure limits
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…[9]
- Fresh air, rest. Half-upright position. Artificial respiration may be needed. Refer for medical attention.[3]
- Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention . Wear protective gloves when administering first aid.[3]
Storage
- See Chemical Dangers. Separated from food and feedstuffs and incompatible materials. Dry. Well closed.[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. Store under inert gas. Moisture sensitive. Storage class (TRGS 510): Combustible, corrosive hazardous materials.[5]
- Store in a cool, dry, well-ventilated location. Separate from alkalies, oxidizing materials, alcohol, and water.[5]
Incompatibilities
- Incompatible materials: Strong oxidizing agents, strong bases, alcohols.[5]
- Will react with water or steam to produce heat and toxic and corrosive fumes.[5]
- Violent or explosive reaction with dimethyl sulfoxide, and aluminum chloride + naphthalene.[5]
- Incompatible with dimethyl sulfoxide, (sodium azide + potassium hydroxide), water, steam, and oxidizers.[5]
Safety data sheets on the supplier’s page: AKos Consulting & Solutions, Finetech Industry Limited, VladaChem.
Always read the supplier’s safety data sheet before working with it.
Spectra
- NMRHazardous Substances Data Bank (HSDB) · NMRShiftDB
- 1H NMRHazardous Substances Data Bank (HSDB) · SpectraBase (BRUKER AC-300)
- 13C NMRSpectraBase
- 17O NMRSpectraBase
- GC-MSNIST Mass Spectrometry Data Center · NIST Mass Spectrometry Data Center · NIST Mass Spectrometry Data Center · NIST Mass Spectrometry Data Center · SpectraBase
- UVHazardous Substances Data Bank (HSDB)
- IRHazardous Substances Data Bank (HSDB)
- FTIRSpectraBase (Bio-Rad FTS · Neat (KBr))
- ATR-IRSpectraBase (PerkinElmer SpectrumTwo · ATR-IR)
- Near IRSpectraBase (BRUKER IFS 88 · NIR Spectrometer= INSTRUMENT PARAMETERS=INST=BRUKER,RSN=7054,REO=2,CNM=HEI,ZFF=2)
- Vapor Phase IRSpectraBase (DIGILAB FTS-14 · Vapor Phase)
- RamanSpectraBase
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]Hazardous Substances Data Bank (HSDB) · Public domain (US NLM) · via PubChem · retrieved 2026-10-14
- [6]PAC Chemical Database, U.S. Department of Energy · Public domain (US DOE) · via PubChem · retrieved 2026-10-14
- [7]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
- [8]European Chemicals Agency (ECHA) · ECHA legal notice: reuse with acknowledgement · via PubChem · retrieved 2026-10-14
- [9]Emergency Response Guidebook (ERG) · Public domain (US DOT) · via PubChem · retrieved 2026-10-14
- [10]NMRShiftDB · Linked only · via PubChem · retrieved 2026-10-14
- [11]SpectraBase · Linked only · via PubChem · retrieved 2026-10-14
- [12]NIST Mass Spectrometry Data Center · 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.
