Formic acid

Athanor · official

CH₂O₂ · 46.025 g/mol

Also called methanoic acid, E236, ant acid

Solvents Reagents

Open in Athanor

Drawn from its SMILES with RDKit

DangerFlammable liquid and vapor · May be corrosive to metals · Harmful if swallowed · Causes severe skin burns and eye damage · Causes serious eye damage · Toxic if inhaled

Names and identifiers

IUPAC name: formic acid
Synonyms: methanoic acid, E236, ant acid
+ 38 more
Methanoic acid, Formylic acid, Aminic acid, Bilorin, Hydrogen carboxylic acid, Formisoton, Formira, Myrmicyl, Collo-bueglatt, Collo-didax, Acide formique, Add-F, Ameisensaeure, C1 acid, RCRA waste number U123, Mierenzuur, Acido formico, Formicum acidum, Kwas metaniowy, Kyselina mravenci, FEMA No. 2487, AI3-24237, 0YIW783RG1, DTXSID2024115, CHEBI:30751, VARROMED COMPONENT FORMIC ACID, Acidum formicum, Provita Konquest, RefChem:6641, Provita Hoofsure Endurance, Provita Hoofsure Endurance XL, DTXCID904115, Provita Hoofsure Endurance Express, 200-579-1, hydron;formate, Formic acid (natural), Mierenzuur [Dutch], Ameisensaeure [German]
Molecular formula: CH₂O₂
Empirical formula: CH₂O₂
Molecular weight: 46.025 g/mol
Exact mass: 46.00548
CAS number: 64-18-6
PubChem CID: 284
Canonical SMILES: C(=O)O
Isomeric SMILES: C(=O)O
InChI: InChI=1S/CH2O2/c2-1-3/h1H,(H,2,3)
InChIKey: BDAGIHXWWSANSR-UHFFFAOYSA-N
Molfile

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

Physical properties

TemperaturePressureDensity

Appearance: Colorless fuming liquid[6]
7 values
From Hazardous Substances Data Bank (HSDB), the most authoritative source here.
Value As written Source
– Formic acid appears as a colorless liquid with a pungent odor. Flash point 156 °F. Density 10.2 lb / gal. Corrosive to metals and tissue. [1] CAMEO Chemicals
– CBI; Dry Powder; Liquid; Other Solid; Liquid [2] EPA Chemical Data Reporting (CDR)
– COLOURLESS FUMING LIQUID WITH PUNGENT ODOUR. [3] ILO-WHO International Chemical Safety Cards (ICSCs)
– Colorless liquid with a pungent, penetrating odor. [4] Occupational Safety and Health Administration (OSHA)
– Colorless liquid with a pungent, penetrating odor. [Note: Often used in an aqueous solution.] [5] The National Institute for Occupational Safety and Health (NIOSH)
–shown Colorless fuming liquid [6] Hazardous Substances Data Bank (HSDB)cites Lewis, R.J. Sr.; Hawley's Condensed Chemical Dictionary 15th Edition. John Wiley & Sons, Inc. New York, NY 2007., p. 580
– Colorless liquid [Note: Often used in an aqueous solution] [6] Hazardous Substances Data Bank (HSDB)cites NIOSH. NIOSH Pocket Guide to Chemical Hazards. Department of Health & Human Services, Centers for Disease Prevention & Control. National Institute for Occupational Safety & Health. DHHS (NIOSH) Publication No. 2010-168 (2010). Available from, as of Oct 13, 2011: https://www.cdc.gov/niosh/npg/
Odor: Pungent, penetrating odor[6]
Melting point: 8.4 °C (47.1 °F, NTP 1992)[1]
5 values
3 of 5 sources agree on it (most common value).
Value As written Source
8.4 °Cshown 47.1 °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.
8 °C 8 °C [3] ILO-WHO International Chemical Safety Cards (ICSCs)
−7 °C 20 °F (90% solution) [4] Occupational Safety and Health Administration (OSHA)
8.3 °C 8.3 °C [7] PAC Chemical Database, U.S. Department of Energy
−7 °C 20 °F (90% solution) [5] The National Institute for Occupational Safety and Health (NIOSH)
Boiling point: 100.7 °C (213.3 °F) at 760 mmHg (NTP, 1992)[1]
4 values
2 of 4 sources agree on it (most common value).
Value As written Source
100.7 °Cshown 213.3 °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.
107 °C 224 °F (90% solution) [4] Occupational Safety and Health Administration (OSHA)
101 °C 101 °C @760 [mm Hg] [7] PAC Chemical Database, U.S. Department of Energy
107 °C 224 °F (90% solution) [5] The National Institute for Occupational Safety and Health (NIOSH)
Density: 1.220 @ 20°C[7]
5 values
5 of 5 sources agree on it (most common value).
Value As written Source
– 1.22 at 68 °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): 1.2 (20 °C) [3] ILO-WHO International Chemical Safety Cards (ICSCs)
– 1.22 (90% solution) [4] Occupational Safety and Health Administration (OSHA)
–shown 1.220 @ 20°C [7] PAC Chemical Database, U.S. Department of Energy
– 1.22 (90% solution) [5] The National Institute for Occupational Safety and Health (NIOSH)
2 more values were reported but failed the checks (unreadable or out of range), so they are not shown.
Solubility in water: Solubility in water: miscible[3]
5 values
From ILO-WHO International Chemical Safety Cards (ICSCs), the most authoritative source here.
Value As written Source
– greater than or equal to 100 mg/mL 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.
– Dissolves to the extent of about 10% in benzene, toluene, and xylenes, and to a lesser extent in aliphatic hydrocarbons. [6] Hazardous Substances Data Bank (HSDB)cites Drury DJ; Kirk-Othmer Encyclopedia of Chemical Technology. (1999-2011). New York, NY: John Wiley & Sons; Formic Acid. Online Posting Date: 4 Dec 2000
– Miscible with water [6] Hazardous Substances Data Bank (HSDB)cites Riddick, J.A., W.B. Bunger, Sakano T.K. Techniques of Chemistry 4th ed., Volume II. Organic Solvents. New York, NY: John Wiley and Sons., 1985., p. 360
–shown Solubility in water: miscible [3] ILO-WHO International Chemical Safety Cards (ICSCs)
– Miscible [5] The National Institute for Occupational Safety and Health (NIOSH)
log P: -0.54[3]
2 values
2 of 2 sources agree on it (most common value).
Value As written Source
– log Kow = -0.54 [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. 3
–shown -0.54 [3] ILO-WHO International Chemical Safety Cards (ICSCs)
pKa: pKa = 3.75 at 20 °C[6]
Vapor pressure: Vapor pressure, kPa at 20 °C: 4.6[3]
5 values
2 of 4 sources agree on it (most common value).
Value As written Source
35 mmHg 35 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.
200 mmHg 200 mmHg at 142.5 °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.
42.59 mmHg 42.59 mm Hg at 25 °C /Extrapolated/ [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., p. 4904
35 mmHgshown Vapor pressure, kPa at 20 °C: 4.6 [3] ILO-WHO International Chemical Safety Cards (ICSCs)
75 mmHg 75 [mm Hg] @37 °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: 69 °C (156 °F) (closed cup)[6]
5 values
2 of 4 sources agree on it (most common value).
Value As written Source
69 °C 156 °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.
69 °Cshown 156 °F (69 °C) (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. 325-66
59 °C 138 °F, open cup [6] Hazardous Substances Data Bank (HSDB)cites U.S. Coast Guard, Department of Transportation. CHRIS - Hazardous Chemical Data. Volume II. Washington, D.C.: U.S. Government Printing Office, 1984-5.
45 °C 45 °C [3] ILO-WHO International Chemical Safety Cards (ICSCs)
50 °C 122 °F (90% solution, open-cup) [4] Occupational Safety and Health Administration (OSHA)
2 more values were reported but failed the checks (unreadable or out of range), so they are not shown.
Autoignition temperature: 539 °C (1004 °F)[6]
3 values
Sources disagree; from Hazardous Substances Data Bank (HSDB), the most authoritative.
Value As written Source
601 °C 1114 °F (USCG, 1999) [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.
540 °Cshown 1004 °F (539 °C) [6] Hazardous Substances Data Bank (HSDB)cites National Fire Protection Association; Fire Protection Guide to Hazardous Materials. 14TH Edition, Quincy, MA 2010, p. 325-66
520 °C 520 °C [3] ILO-WHO International Chemical Safety Cards (ICSCs)
1 more value was reported but failed the checks (unreadable or out of range), so it is not shown.
Viscosity: Reported, but no value passed the checks.
The value and why
1.5 mm²/s (could not be read; source [3])

Value	As written	Source
–	Formic acid appears as a colorless liquid with a pungent odor. Flash point 156 °F. Density 10.2 lb / gal. Corrosive to metals and tissue.	[1] CAMEO Chemicals
–	CBI; Dry Powder; Liquid; Other Solid; Liquid	[2] EPA Chemical Data Reporting (CDR)
–	COLOURLESS FUMING LIQUID WITH PUNGENT ODOUR.	[3] ILO-WHO International Chemical Safety Cards (ICSCs)
–	Colorless liquid with a pungent, penetrating odor.	[4] Occupational Safety and Health Administration (OSHA)
–	Colorless liquid with a pungent, penetrating odor. [Note: Often used in an aqueous solution.]	[5] The National Institute for Occupational Safety and Health (NIOSH)
–shown	Colorless fuming liquid	[6] Hazardous Substances Data Bank (HSDB)cites Lewis, R.J. Sr.; Hawley's Condensed Chemical Dictionary 15th Edition. John Wiley & Sons, Inc. New York, NY 2007., p. 580
–	Colorless liquid [Note: Often used in an aqueous solution]	[6] Hazardous Substances Data Bank (HSDB)cites NIOSH. NIOSH Pocket Guide to Chemical Hazards. Department of Health & Human Services, Centers for Disease Prevention & Control. National Institute for Occupational Safety & Health. DHHS (NIOSH) Publication No. 2010-168 (2010). Available from, as of Oct 13, 2011: https://www.cdc.gov/niosh/npg/

Value	As written	Source
8.4 °Cshown	47.1 °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.
8 °C	8 °C	[3] ILO-WHO International Chemical Safety Cards (ICSCs)
−7 °C	20 °F (90% solution)	[4] Occupational Safety and Health Administration (OSHA)
8.3 °C	8.3 °C	[7] PAC Chemical Database, U.S. Department of Energy
−7 °C	20 °F (90% solution)	[5] The National Institute for Occupational Safety and Health (NIOSH)

Value	As written	Source
100.7 °Cshown	213.3 °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.
107 °C	224 °F (90% solution)	[4] Occupational Safety and Health Administration (OSHA)
101 °C	101 °C @760 [mm Hg]	[7] PAC Chemical Database, U.S. Department of Energy
107 °C	224 °F (90% solution)	[5] The National Institute for Occupational Safety and Health (NIOSH)

Value	As written	Source
–	1.22 at 68 °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): 1.2 (20 °C)	[3] ILO-WHO International Chemical Safety Cards (ICSCs)
–	1.22 (90% solution)	[4] Occupational Safety and Health Administration (OSHA)
–shown	1.220 @ 20°C	[7] PAC Chemical Database, U.S. Department of Energy
–	1.22 (90% solution)	[5] The National Institute for Occupational Safety and Health (NIOSH)

Value	As written	Source
–	greater than or equal to 100 mg/mL 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.
–	Dissolves to the extent of about 10% in benzene, toluene, and xylenes, and to a lesser extent in aliphatic hydrocarbons.	[6] Hazardous Substances Data Bank (HSDB)cites Drury DJ; Kirk-Othmer Encyclopedia of Chemical Technology. (1999-2011). New York, NY: John Wiley & Sons; Formic Acid. Online Posting Date: 4 Dec 2000
–	Miscible with water	[6] Hazardous Substances Data Bank (HSDB)cites Riddick, J.A., W.B. Bunger, Sakano T.K. Techniques of Chemistry 4th ed., Volume II. Organic Solvents. New York, NY: John Wiley and Sons., 1985., p. 360
–shown	Solubility in water: miscible	[3] ILO-WHO International Chemical Safety Cards (ICSCs)
–	Miscible	[5] The National Institute for Occupational Safety and Health (NIOSH)

Value	As written	Source
–	log Kow = -0.54	[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. 3
–shown	-0.54	[3] ILO-WHO International Chemical Safety Cards (ICSCs)

Value	As written	Source
35 mmHg	35 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.
200 mmHg	200 mmHg at 142.5 °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.
42.59 mmHg	42.59 mm Hg at 25 °C /Extrapolated/	[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., p. 4904
35 mmHgshown	Vapor pressure, kPa at 20 °C: 4.6	[3] ILO-WHO International Chemical Safety Cards (ICSCs)
75 mmHg	75 [mm Hg] @37 °C	[7] PAC Chemical Database, U.S. Department of Energy

Value	As written	Source
69 °C	156 °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.
69 °Cshown	156 °F (69 °C) (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. 325-66
59 °C	138 °F, open cup	[6] Hazardous Substances Data Bank (HSDB)cites U.S. Coast Guard, Department of Transportation. CHRIS - Hazardous Chemical Data. Volume II. Washington, D.C.: U.S. Government Printing Office, 1984-5.
45 °C	45 °C	[3] ILO-WHO International Chemical Safety Cards (ICSCs)
50 °C	122 °F (90% solution, open-cup)	[4] Occupational Safety and Health Administration (OSHA)

Value	As written	Source
601 °C	1114 °F (USCG, 1999)	[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.
540 °Cshown	1004 °F (539 °C)	[6] Hazardous Substances Data Bank (HSDB)cites National Fire Protection Association; Fire Protection Guide to Hazardous Materials. 14TH Edition, Quincy, MA 2010, p. 325-66
520 °C	520 °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): 0
H-bond donors: 1
H-bond acceptors: 1 computed here · PubChem 2
Rotatable bonds: 0
TPSA (Å²): 37.3
Formal charge: 0
XLogP3: -0.2 PubChem
Complexity: 10 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

C26.10%
H4.38%
O69.52%

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: -0.3 Crippen (Wildman and Crippen 1999)
log S (water solubility): 0.06 ESOL (Delaney 2004), log mol/L
Synthetic accessibility: 3.06 SA score, 1 easy to 10 hard (Ertl and Schuffenhauer 2009)

Drug-likeness: Lipinski’s rule of five

Molecular weight ≤ 500: 46.02
log P ≤ 5 (Crippen): -0.3
H-bond donors ≤ 5: 1
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 [8].

Flammable
Corrosive
Acute toxicity

NFPA 704[6]

H226Flammable liquid and vapor
H290May be corrosive to metals
H302Harmful if swallowed
H314Causes severe skin burns and eye damage
H318Causes serious eye damage
H331Toxic if inhaled

Precautionary statements: P210, P233, P234, P240, P241, P242, P243, P260, P261, P264, P264+P265, P270, P271, P280, P301+P317, P301+P330+P331, P302+P361+P354, P303+P361+P353, P304+P340, P305+P354+P338, P316, P317, P321, P330, P363, P370+P378, P390, P403+P233, P403+P235, P405, P406, P501

View all classifications (3)

[8] Regulation (EC) No 1272/2008 of the European Parliament and of the Council · DangerH226, H290, H302, H314, H318, H331
[9] European Chemicals Agency (ECHA)This chemical does not meet GHS hazard criteria for < 0.1% (1 of 3384) of reports.
[9] European Chemicals Agency (ECHA) · 3,384 reports · DangerH226, H302, H314, H318, H331

Exposure limits

PEL-TWA (8-Hour Time Weighted Average): 5 ppm (9 mg/m³)[4]
PEL: TWA 5 ppm (9 mg/m3)[5]
TLV: 5 ppm as TWA; 10 ppm as STEL.[3]
TLV-TWA (Time Weighted Average): 5 ppm [1965][4]
TLV-STEL (Short Term Exposure Limit): 10 ppm [1965][4]
IDLH: 30 ppm (NIOSH, 2024)[1]

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: · 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: Water flush immediately - If this chemical contacts the skin, immediately flush the contaminated skin with water. If this chemical penetrates the clothing, immediately remove the clothing and flush the skin with water.[5]

Storage

Fireproof. Store only in original container. Well closed. Separated from strong oxidants, strong bases, strong acids and food and feedstuffs. See Chemical Dangers. Keep in a well-ventilated room. Store in an area without drain or sewer access.[3]
Store in a dry, well-ventilated place. Separate from oxidizing materials and alkaline substances.[6]
Protect against physical damage. Store in a cool, dry, well-ventilated location. Outdoors or detached storage is preferred.[6]
Separated from strong oxidants, strong bases, strong acids, and food and feedstuffs. Well closed. Keep in a well-ventilated room.[6]

Incompatibilities

(aluminium) ... Reduces the acid (itself a reducant) with incandescence.[6]
During prepn of ... (peroxyformic acid) by a patented procedure involving interaction of formic acid with hydrogen peroxide in presence of metabolic acid, an explosion occurred which was attributed to spontaneous separation of virtually pure peroxyformic acid.[6]
(reacts) ... Explosively with oxidizing agents...[6]
During an attempt to prepare furfuryl formate from furfuryl alcohol and concentrated formic acid, an explosion occurred.[6]

Safety data sheets on the supplier’s page: Thermo Fisher Scientific, MP Biomedicals, Enamine.

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]Human Metabolome Database (HMDB) · Linked only · via PubChem · retrieved 2026-10-14
[13]SpectraBase · Linked only · via PubChem · retrieved 2026-10-14
[14]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.