Dimethylacetamide
Athanor · official
C4H9NO · 87.12 g/mol
IUPAC name: N,N-dimethylacetamide
Also called DMA, DMAc, N,N-dimethylacetamide
Names and identifiers
- IUPAC name
- N,N-dimethylacetamide
- Synonyms
- DMA, DMAc, N,N-dimethylacetamide
+ 37 more
N,N-DIMETHYLACETAMIDE, Acetamide, N,N-dimethyl-, Acetdimethylamide, Dimethyl acetamide, N,N-Dimethyl acetamide, Dimethylamide acetate, N,N-Dimethylethanamide, Dimethylacetone amide, Acetic acid, dimethylamide, Acetyldimethylamine, NSC 3138, Acetic acid dimethylamide, CBC 510337, DTXSID5020499, SK 7176, Dimethylamid kyseliny octove, U-5954, JCV5VDB3HY, NSC-3138, DTXCID90499, CHEBI:84254, NSC3138, RefChem:6046, 204-826-4, N.N-Dimethylacetamide, MFCD00008686, Hallucinogen, Acetic acid-dimethylamide, n-n-dimethylacetamide, N,N-Dimethylacetamide, anhydrous, N-N-Dimethylacetamide(DMAC), Dimethylacetamide; N,N-Dimethylacetamide, Acetyl dimethylamine, CAS-127-19-5, HSDB 74, N-Acetyldimethylamine, CCRIS 4623
- Molecular formula
- C4H9NO
- Empirical formula
- C4H9NO
- Molecular weight
- 87.12 g/mol
- Exact mass
- 87.06841
- CAS number
- 127-19-5
- PubChem CID
- 31374
- Canonical SMILES
- CC(=O)N(C)C
- Isomeric SMILES
- CC(=O)N(C)C
- InChI
- InChI=1S/C4H9NO/c1-4(6)5(2)3/h1-3H3
- InChIKey
- FXHOOIRPVKKKFG-UHFFFAOYSA-N
- Molfile
Names, InChI and the identifiers from PubChem, retrieved 2026-10-14.
Physical properties
- Appearance
- Colorless liquid[6]
8 values
From Hazardous Substances Data Bank (HSDB), the most authoritative source here.
Value As written Source – Dimethylacetamide appears as a clear colorless liquid with a faint odor similar to ammonia. About the same density as water. Flash point 145 °F. Vapors heavier than air. May by toxic by skin absorption. May irritate eyes and skin. [1] CAMEO Chemicals – N,n-dimethyl acetamide solution (40% or less) is a colorless liquid with a slight ammonia-like odor. (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. – Wet Solid; CBI; Liquid [2] EPA Chemical Data Reporting (CDR) – OILY COLOURLESS LIQUID WITH PUNGENT ODOUR. [3] ILO-WHO International Chemical Safety Cards (ICSCs) – Colorless liquid with a weak, ammonia- or fish-like odor. [4] Occupational Safety and Health Administration (OSHA) – Colorless liquid with a weak, ammonia- or fish-like odor. [5] The National Institute for Occupational Safety and Health (NIOSH) – OILY [6] Hazardous Substances Data Bank (HSDB)cites Verschueren, K. Handbook of Environmental Data of Organic Chemicals. 2nd ed. New York, NY: Van Nostrand Reinhold Co., 1983., p. 543 –shown Colorless liquid [6] Hazardous Substances Data Bank (HSDB)cites NIOSH. NIOSH Pocket Guide to Chemical Hazards. DHHS (NIOSH) Publication No. 97-140. Washington, D.C. U.S. Government Printing Office, 1997., p. 110 - Odor
- Weak, ammonia- or fish-like odor[6]
2 values
From Hazardous Substances Data Bank (HSDB), the most authoritative source here.
Value As written Source – AMINE [6] Hazardous Substances Data Bank (HSDB)cites Verschueren, K. Handbook of Environmental Data of Organic Chemicals. 2nd ed. New York, NY: Van Nostrand Reinhold Co., 1983., p. 543 –shown Weak, ammonia- or fish-like odor [6] Hazardous Substances Data Bank (HSDB)cites NIOSH. NIOSH Pocket Guide to Chemical Hazards. DHHS (NIOSH) Publication No. 97-140. Washington, D.C. U.S. Government Printing Office, 1997., p. 110 - Melting point
- -20 °C[3]
6 values
5 of 5 sources agree on it (most common value).
Value As written Source −20 °C -4 °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 -4 °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. −20 °Cshown -20 °C [3] ILO-WHO International Chemical Safety Cards (ICSCs) −20 °C -4 °F [4] Occupational Safety and Health Administration (OSHA) −20 °C -20 °C [7] PAC Chemical Database, U.S. Department of Energy −20 °C -4 °F [5] The National Institute for Occupational Safety and Health (NIOSH) - Boiling point
- 165 °C[3]
6 values
5 of 5 sources agree on it (most common value).
Value As written Source 165 to 166 °C 329 to 331 °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. 166 °C 331 °F at 760 mmHg (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. 165 °Cshown 165 °C [3] ILO-WHO International Chemical Safety Cards (ICSCs) 165 °C 329 °F [4] Occupational Safety and Health Administration (OSHA) 165 °C 165 °C @760 [mm Hg] [7] PAC Chemical Database, U.S. Department of Energy 165 °C 329 °F [5] The National Institute for Occupational Safety and Health (NIOSH) - Density
- 0.943 @ 20°C[7]
6 values
5 of 5 sources agree on it (most common value).
Value As written Source – 0.943 at 68 °F (USCG, 1999) - Less dense 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. – 0.937 (USCG, 1999) - Less dense 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): 0.94 [3] ILO-WHO International Chemical Safety Cards (ICSCs) – 0.94 [4] Occupational Safety and Health Administration (OSHA) –shown 0.943 @ 20°C [7] PAC Chemical Database, U.S. Department of Energy – 0.94 [5] The National Institute for Occupational Safety and Health (NIOSH) - Solubility in water
- Solubility in water: miscible[3]
4 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 72 °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. – Miscible in 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. 661 –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
- -0.77[3]
2 values
2 of 2 sources agree on it (most common value).
Value As written Source – log Kow= -0.77 [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. 10 –shown -0.77 [3] ILO-WHO International Chemical Safety Cards (ICSCs) - pKa
- pKa = -0.19 @ < 25 °C in aqueous sulfuric acid[6]
- Vapor pressure
- Vapor pressure, kPa at 20 °C: 0.33[3]
4 values
Sources disagree; from ILO-WHO International Chemical Safety Cards (ICSCs), the most authoritative.
Value As written Source 9 mmHg 9 mmHg at 140 °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. 2 mmHg 2 mm Hg @ 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. 2.5 mmHgshown Vapor pressure, kPa at 20 °C: 0.33 [3] ILO-WHO International Chemical Safety Cards (ICSCs) 1.3 mmHg 1.3 [mm Hg] @25 °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
- 63 °C (145 °F, USCG 1999)[1]
5 values
2 of 4 sources agree on it (most common value).
Value As written Source 66 °C 151 °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. 63 °Cshown 145 °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. 70 °C 70 °C (OPEN CUP) [6] Hazardous Substances Data Bank (HSDB)cites Fire Protection Guide to Hazardous Materials. 12 ed. Quincy, MA: National Fire Protection Association, 1997., p. 325-41 63 °C 63 °C c.c. [3] ILO-WHO International Chemical Safety Cards (ICSCs) 70 °C 158 °F (open cup) [4] Occupational Safety and Health Administration (OSHA) 1 more value was reported but failed the checks (unreadable or out of range), so it is not shown.
- Autoignition temperature
- 490 °C[3]
4 values
3 of 3 sources agree on it (most common value).
Value As written Source 490 °C 914 °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. 490 °C 914 °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. 490 °C 490 °C [6] Hazardous Substances Data Bank (HSDB)cites Fire Protection Guide to Hazardous Materials. 12 ed. Quincy, MA: National Fire Protection Association, 1997., p. 325-41 490 °Cshown 490 °C [3] ILO-WHO International Chemical Safety Cards (ICSCs) - Viscosity
- 0.92 cP @ 25 °C[6]
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
- 6
- Rings
- 0
- Aromatic rings
- 0
- Fraction sp³ carbons (Fsp3)
- 0.75
- H-bond donors
- 0
- H-bond acceptors
- 1
- Rotatable bonds
- 0
- TPSA (Ų)
- 20.3
- Formal charge
- 0
- XLogP3
- -0.8 PubChem
- Complexity
- 58 PubChem
- Stereocenters
- None
- Double-bond geometry
- None specified
- Point group
- C1 of one 3D conformer with its hydrogens, by Athanor’s engine (as in the app)
Elemental analysis
- C55.15%
- H10.41%
- N16.08%
- O18.36%
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
- 0.09 Crippen (Wildman and Crippen 1999)
- log S (water solubility)
- -0.44 ESOL (Delaney 2004), log mol/L
- Synthetic accessibility
- 1.98 SA score, 1 easy to 10 hard (Ertl and Schuffenhauer 2009)
Drug-likeness: Lipinski’s rule of five
- Molecular weight ≤ 500: 87.12
- log P ≤ 5 (Crippen): 0.09
- 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 [8].
Harmful or irritant
Health hazard
- H312Harmful in contact with skin
- H332Harmful if inhaled
Precautionary statements: P203, P261, P271, P280, P302+P352, P304+P340, P317, P318, P321, P362+P364, P405, P501
View all classifications (2)
- [8] Regulation (EC) No 1272/2008 of the European Parliament and of the Council · DangerH312, H332
- [9] European Chemicals Agency (ECHA) · 1,024 reports · DangerH312+H332, H312, H319, H332, H360, H360D
Exposure limits
- PEL-TWA (8-Hour Time Weighted Average): 10 ppm (35 mg/m³)[4]
- PEL: TWA 10 ppm (35 mg/m3) [skin][5]
- TLV: 10 ppm as TWA; (skin); A3 (confirmed animal carcinogen with unknown relevance to humans); BEI issued.[3]
- TLV-TWA (Time Weighted Average): 10 ppm [2017][4]
- IDLH: 300 ppm (NIOSH, 2024)[1]
- IDLH: 300 ppm [From npg: Dimethyl acetamide] (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]
- Call for medical aid. Eyes: Flush with plenty of water for 15 min., lifting lids occasionally. Skin: Flush with plenty of water for 15 min. Remove contaminated clothing and shoes. Ingestion: Induce vomiting. (USCG, 1999)[1]
- (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]
- Fresh air, rest. Refer for medical attention.[3]
Storage
- Ventilation along the floor. Separated from strong oxidants.[3]
- Materials which ARE toxic AS stored OR which CAN decompose INTO toxic components ... Should BE stored IN A COOL WELL ventilated place, OUT OF direct RAYS OF THE SUN, AWAY FROM areas OF HIGH FIRE hazard, AND should BE periodically inspected. Incompatible materials should BE isolated ... .[6]
Incompatibilities
- Carbon tetrachloride, other halogenated compounds when in contact with iron, oxidizers.[6]
- Violent reaction with halogenated compounds (e.g, carbon tetrachloride, hexachlorocyclohexane) when heated above 90 °C. Iron powder catalyzes the reaction so that it initiates at 71 °C.[6]
- Carbon tetrachloride, other halogenated compounds when in contact with iron, oxidizers[5]
Safety data sheets on the supplier’s page: Chem-Space.com Database, Thermo Fisher Scientific, Clinivex.
Always read the supplier’s safety data sheet before working with it.
Spectra
- NMRHazardous Substances Data Bank (HSDB) · NMRShiftDB
- 1H NMRSpectraBase (Varian A-60)
- 13C NMRSpectraBase
- 15N NMRSpectraBase
- 17O NMRSpectraBase
- GC-MSMassBank of North America (MoNA) (HITACHI RMU-7M · EI-B · positive) · MassBank of North America (MoNA) (HITACHI M-80 · EI-B · positive) · MassBank of North America (MoNA) (HITACHI M-80 · EI-B · positive) · NIST Mass Spectrometry Data Center · NIST Mass Spectrometry Data Center · NIST Mass Spectrometry Data Center
- Other MSHazardous Substances Data Bank (HSDB) · MassBank Europe (HITACHI RMU-7M · EI-B · POSITIVE) · MassBank Europe (HITACHI M-80 · EI-B · POSITIVE) · MassBank Europe (HITACHI M-80 · EI-B · POSITIVE)
- UVHazardous Substances Data Bank (HSDB)
- IRHazardous Substances Data Bank (HSDB)
- FTIRSpectraBase (DIGILAB FTS-40 · NEAT)
- ATR-IRSpectraBase (PerkinElmer SpectrumTwo · ATR-IR)
- Near IRSpectraBase (INSTRUMENT PARAMETERS=INST=BRUKER,RSN=10525,REO=2,CNM=HEI,ZFF=2 · NIR Spectrometer= BRUKER IFS 88)
- Vapor Phase IRSpectraBase (Bruker IFS 85 · Gas-GC)
- 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]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]NMRShiftDB · Linked only · via PubChem · retrieved 2026-10-14
- [11]SpectraBase · Linked only · via PubChem · retrieved 2026-10-14
- [12]MassBank of North America (MoNA) · CC BY 4.0 · via PubChem · retrieved 2026-10-14
- [13]NIST Mass Spectrometry Data Center · Linked only · via PubChem · retrieved 2026-10-14
- [14]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.
