Dalapon-sodium

Dalapon-sodium
Names
	IUPAC name sodium 2,2-dichloropropionate
	Other names dalapon; proprop; DPA; sodium 2,2-dichloropropanoate;
Identifiers
CAS Number	127-20-8;
3D model (JSmol)	Interactive image;
ChEMBL	ChEMBL3188445;
ChemSpider	29108;
ECHA InfoCard	100.004.390
EC Number	204-828-5;
PubChem CID	517058;
UNII	ZAQ365WW9E;
CompTox Dashboard (EPA)	DTXSID5024001 ;
	InChI InChI=1S/C3H4Cl2O2.Na/c1-3(4,5)2(6)7;/h1H3,(H,6,7);/q;+1/p-1 Key: PDEFQWNXOUGDJR-UHFFFAOYSA-M;
	SMILES CC(C(=O)[O-])(Cl)Cl.[Na+];
Properties
Chemical formula	C3H3Cl2NaO2
Molar mass	164.94 g·mol−1
Appearance	Pale-coloured powder
Density	1740 kg/cu.m
Melting point	191 °C (376 °F; 464 K) (decomposes)
Solubility in water	629 g/L, 500,000 ppm
Solubility in methanol	369 g/L
Solubility in ethanol	110 g/L
Solubility in acetone	3.25 g/L
Solubility in benzene	0.02 g/L
Vapor pressure	<1 mPa
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H315, H318, H412
Precautionary statements	P264, P264+P265, P273, P280, P302+P352, P305+P354+P338, P317, P321, P332+P317, P362+P364, P501
Related compounds
Related compounds	Dalapon; Dalapon-magnesium; Dalapon-calcium;
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Dalapon-sodium is the sodium salt of dalapon, a selective herbicide,^[2] used in Australia. Sometimes it is also simply called "dalapon" or "dalapon (present as the sodium salt)",^[5]^[1] see dalapon for information on dalapon generally.

Dalapon-sodium is an organochloride, the conjugate base of 2,2-dichloropropanoic acid, and usually supplied as a water-soluble powder.^[1] Concentrated solutions hydrolyze over time.^[6]

Dalapon-sodium's mode of action is unknown, which puts it in Group Z / Group 0 under the HRAC classification.^[5]

In soil, it has a half life tested at 30 days.^[3]

References

1 2 3 4 5 6 7 8 9 "Dalapon-sodium -- Pesticide Properties Database". sitem.herts.ac.uk. University of Hertfordshire. Retrieved 1 May 2026.
1 2 "dalapon-sodium data sheet". bcpcpesticidecompendium.org. BCPC. Retrieved 1 May 2026.
1 2 3 4 "USDA ARS Pesticides Properties DataBase". www.ars.usda.gov. Beltsville, MD: Agricultural Research Service, U.S. Department of Agriculture. Retrieved 20 April 2026.
↑ PubChem. "Dalapon sodium". pubchem.ncbi.nlm.nih.gov. Retrieved 2026-05-01.
1 2 "4Farmers Dalapon 740 Leaflet" (PDF). 4farmers.com.au. 4Farmers Australia. Retrieved 1 May 2026.
↑ Tanaka, Fred S.; Wien, Ronald G. (March 1973). "Hydrolysis of aqueous solutions of sodium 2,2-dichloropropionate under self-induced alkaline conditions". Journal of Agricultural and Food Chemistry. 21 (2): 285–288. Bibcode:1973JAFC...21..285T. doi:10.1021/jf60186a007. ISSN 0021-8561.

External links

Dalapon-sodium in the Pesticide Properties DataBase (PPDB)

[database-1] 1 2 3 4 5 6 7 8 9 "Dalapon-sodium -- Pesticide Properties Database". sitem.herts.ac.uk. University of Hertfordshire. Retrieved 1 May 2026.

[bcpc-2] 1 2 "dalapon-sodium data sheet". bcpcpesticidecompendium.org. BCPC. Retrieved 1 May 2026.

[ars-3] 1 2 3 4 "USDA ARS Pesticides Properties DataBase". www.ars.usda.gov. Beltsville, MD: Agricultural Research Service, U.S. Department of Agriculture. Retrieved 20 April 2026.

[4] PubChem. "Dalapon sodium". pubchem.ncbi.nlm.nih.gov. Retrieved 2026-05-01.

[4f_leaflet-5] 1 2 "4Farmers Dalapon 740 Leaflet" (PDF). 4farmers.com.au. 4Farmers Australia. Retrieved 1 May 2026.

[6] Tanaka, Fred S.; Wien, Ronald G. (March 1973). "Hydrolysis of aqueous solutions of sodium 2,2-dichloropropionate under self-induced alkaline conditions". Journal of Agricultural and Food Chemistry. 21 (2): 285–288. Bibcode:1973JAFC...21..285T. doi:10.1021/jf60186a007. ISSN 0021-8561.

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