2,4-D

• Formula: C₈H₆Cl₂O₃
• Molecular weight: 221.037
• IUPAC Standard InChI: InChI=1S/C8H6Cl2O3/c9-5-1-2-7(6(10)3-5)13-4-8(11)12/h1-3H,4H2,(H,11,12) Copy

  
• IUPAC Standard InChIKey: OVSKIKFHRZPJSS-UHFFFAOYSA-N Copy
• CAS Registry Number: 94-75-7
• Chemical structure:
  This structure is also available as a 2d Mol file or as a computed 3d SD file
  The 3d structure may be viewed using Java or Javascript.
• Other names: Acetic acid, (2,4-dichlorophenoxy)-; (Dichlorophenoxy)acetic acid; (2,4-Dichlorophenoxy)acetic acid; (2,4-Dichlorophenyloxy)acetic acid; B-Selektonon; Dicopur; Esteron 99; Fernimine; Foredex 75; Hedonal, herbicide; Ipaner; Monosan; Netagrone; Pielik; U 46DP; Verton 2D; Vidon 638; Weedone; 2,4-D Acid; (2,4-Dichloor-fenoxy)-azijnzuur; (2,4-Dichlor-phenoxy)-essigsaeure; (2,4-Dichlorphenoxy)acetic acid; Acide 2,4-dichloro phenoxyacetique; Acido(2,4-dicloro-fenossi)-acetico; Agrotect; Amoxone; Chipco turf herbicide "D"; Chloroxone; Crop rider; Crotilin; Dacamine; Decamine; Ded-Weed LV-69; Dormone; DMA-4; Esteron; Esteron 44 weed killer; Esteron 76 BE; Estone; Fernesta; Fernoxone; Formula 40; Hedonal; Moxone; NSC 423; Pennamine; Pennamine D; Phenox; Planotox; Salvo; Tributon; U-5043; Vergemaster; Verton; Verton D; Vertron 2D; Visko-rhap low drift herbicides; Visko-rhap low volatile 4l; Weed-ag-bar; Weed-B-gon; Weed-Rhap; Weedar; Weedar-64; Weedez wonder bar; Weedone LV4; 2,4-Dwuchlorofenoksyoctowy kwas; Acme amine 4; Acme butyl ester 4; Acme LV 4; Amidox; BH 2,4-D; Brush-rhap; D 50; Debroussaillant 600; Desormone; Dicotox; Dinoxol; Emulsamine bk; Emulsamine E-3; ENT 8,538; Envert 171; Envert dt; Esteron brush killer; Esteron 99 concentrate; Esterone four; Farmco; Ferxone; Herbidal; Kwasu 2,4-dwuchlorofenoksyoctowego; Kwas 2,4-dwuchlorofenoksyoctowy; Kyselina 2,4-dichlorfenoxyoctova; Lawn-keep; Macrondray; Miracle; Netagrone 600; Plantgard; RCRA waste number U240; Rhodia; Spritz-hormin/2,4-D; Spritz-hormit/2,4-D; Super D weedone; Superormone concentre; Transamine; Trinoxol; U 46; Visko-rhap; Weedatul; Weed tox; Weedtrol; Diclordon; 2,4-Dichlorophenoxyethanoic acid; Mota Maskros; 2,4-D Mecoprop; Atlas D; Aminopielik 50SL; Barrage HF; Tiller S; Uniso; Dezormon; Esterone; Huragan
• Permanent link for this species. Use this link for bookmarking this species for future reference.
• Information on this page:
  • Phase change data
  • References
  • Notes
• Other data available:
  • IR Spectrum
  • Mass spectrum (electron ionization)
  • UV/Visible spectrum
  • Gas Chromatography
• Options:
  • Switch to calorie-based units

Data at NIST subscription sites:

• NIST / TRC Web Thermo Tables, professional edition (thermophysical and thermochemical data)

NIST subscription sites provide data under the NIST Standard Reference Data Program, but require an annual fee to access. The purpose of the fee is to recover costs associated with the development of data collections included in such sites. Your institution may already be a subscriber. Follow the links above to find out more about the data in these sites and their terms of usage.

Phase change data

Go To: Top, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled as indicated in comments:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
AC - William E. Acree, Jr., James S. Chickos

Enthalpy of sublimation

Enthalpy of fusion

References

Go To: Top, Phase change data, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Donnelly, Drewes, et al., 1990
Donnelly, J.R.; Drewes, L.A.; Johnson, R.L.; Munslow, W.D.; Knapp, K.K.; Sovocool, G.W., Purity and heat of fusion data for environmental standards as determined by differential scanning calorimetry, Thermochim. Acta, 1990, 167, 2, 155, https://doi.org/10.1016/0040-6031(90)80476-F . [all data]

Plato and Glasgow, 1969
Plato, C.; Glasgow, A.R., Jr., Differential scanning calorimetry as a general method for determining the purity and heat of fusion of high-purity organic chemicals. Application to 95 compounds, Anal. Chem., 1969, 41, 2, 330, https://doi.org/10.1021/ac60271a041 . [all data]

Vecchio and Brunetti, 2005
Vecchio, Stefano; Brunetti, Bruno, Standard Sublimation Enthalpies of Some Dichlorophenoxy Acids and Their Methyl Esters, J. Chem. Eng. Data, 2005, 50, 2, 666-672, https://doi.org/10.1021/je049626l . [all data]

Donnelly, Drewes, et al., 1990, 2
Donnelly, J.R.; Drewes, L.A.; Johnson, R.L.; Munslow, W.D.; Knapp, K.K.; Sovocool, G.W., Purity and heat of fusion data for environmental standards as determined by differential scanning calorimetry, Thermochimica Acta, 1990, 167, 2, 155-187, https://doi.org/10.1016/0040-6031(90)80476-F . [all data]

Notes

Go To: Top, Phase change data, References

• Symbols used in this document:
  

  Tfus	Fusion (melting) point
  ΔfusH	Enthalpy of fusion
  ΔsubH	Enthalpy of sublimation
  ΔsubH°	Enthalpy of sublimation at standard conditions

• Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
• The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database.
• Customer support for NIST Standard Reference Data products.