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N,N-Dimethylacetamide

Athanor · official

C4H9NO · 87.12 g/mol

Also called DMA, DMAc

Open in Athanor
The structure of N,N-Dimethylacetamide
Drawn from its SMILES with RDKit220
Harmful or irritantHealth hazardDangerHarmful in contact with skin · Harmful if inhaled

Names and identifiers

IUPAC name
N,N-dimethylacetamide
Synonyms
DMA, DMAc, Dimethylacetamide
+ 36 more

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

TemperaturePressureDensity
Appearance
Colorless liquid[6]
8 values

From Hazardous Substances Data Bank (HSDB), the most authoritative source here.

ValueAs writtenSource
–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
–shownColorless 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.

ValueAs writtenSource
–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
–shownWeak, 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).

ValueAs writtenSource
−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).

ValueAs writtenSource
165 to 166 °C329 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 °C331 °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 °Cshown165 °C[3] ILO-WHO International Chemical Safety Cards (ICSCs)
165 °C329 °F[4] Occupational Safety and Health Administration (OSHA)
165 °C165 °C @760 [mm Hg][7] PAC Chemical Database, U.S. Department of Energy
165 °C329 °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).

ValueAs writtenSource
–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)
–shown0.943 @ 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.

ValueAs writtenSource
–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
–shownSolubility 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).

ValueAs writtenSource
–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.

ValueAs writtenSource
9 mmHg9 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 mmHg2 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 mmHgshownVapor pressure, kPa at 20 °C: 0.33[3] ILO-WHO International Chemical Safety Cards (ICSCs)
1.3 mmHg1.3 [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).

ValueAs writtenSource
66 °C151 °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 °Cshown145 °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 °C70 °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 °C63 °C c.c.[3] ILO-WHO International Chemical Safety Cards (ICSCs)
70 °C158 °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).

ValueAs writtenSource
490 °C914 °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 °C914 °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 °C490 °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 °Cshown490 °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

100%87.0684.8%88.07189.073

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
220
NFPA 704[6]
  • 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

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. [1]CAMEO Chemicals · Public domain (NOAA) · via PubChem · retrieved 2026-10-14
  2. [2]EPA Chemical Data Reporting (CDR) · Public domain (US EPA) · via PubChem · retrieved 2026-10-14
  3. [3]ILO-WHO International Chemical Safety Cards (ICSCs) · CC BY 4.0 · via PubChem · retrieved 2026-10-14
  4. [4]Occupational Safety and Health Administration (OSHA) · Public domain (US DOL) · via PubChem · retrieved 2026-10-14
  5. [5]The National Institute for Occupational Safety and Health (NIOSH) · Public domain (US CDC) · via PubChem · retrieved 2026-10-14
  6. [6]Hazardous Substances Data Bank (HSDB) · Public domain (US NLM) · via PubChem · retrieved 2026-10-14
  7. [7]PAC Chemical Database, U.S. Department of Energy · Public domain (US DOE) · via PubChem · retrieved 2026-10-14
  8. [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. [9]European Chemicals Agency (ECHA) · ECHA legal notice: reuse with acknowledgement · via PubChem · retrieved 2026-10-14
  10. [10]NMRShiftDB · Linked only · via PubChem · retrieved 2026-10-14
  11. [11]SpectraBase · Linked only · via PubChem · retrieved 2026-10-14
  12. [12]MassBank of North America (MoNA) · CC BY 4.0 · via PubChem · retrieved 2026-10-14
  13. [13]NIST Mass Spectrometry Data Center · Linked only · via PubChem · retrieved 2026-10-14
  14. [14]MassBank Europe · Linked only · via PubChem · retrieved 2026-10-14
  15. ·Calculated values: computed by Athanor with RDKit 2026.09 from the structure.
  16. ·Literature on PubChem

Data last updated 2026-10-14.