2,2-二氯丙酸

Description

2,2-Dichloropropionic acid · CAS 75-99-0 · C3H4Cl2O2. UNII VO6PY8ZMRW. Boiling Point: 374 °F at 760 mmHg (USCG, 1999); Boiling Point: 190 °C; Boiling Point: 374 °F.

Identification

CAS Registry Number	75-99-0
PubChem CID	6418
Molecular formula	C3H4Cl2O2
IUPAC name	2,2-dichloropropanoic acid
UNII (FDA)	VO6PY8ZMRW

Computed Descriptors

Molecular Weight	142.97
XLogP3	1.3
Hydrogen Bond Donor Count	1
Hydrogen Bond Acceptor Count	2
Rotatable Bond Count	1
Exact Mass	141.9588348
Monoisotopic Mass	141.9588348
Topological Polar Surface Area	37.3
Heavy Atom Count	7
Formal Charge	0

Physical & Chemical Properties

Boiling Point	374 °F at 760 mmHg (USCG, 1999)
Boiling Point	190 °C
Boiling Point	374 °F
Melting Point	46 °F (USCG, 1999)
Melting Point	20 °C
Melting Point	46 °F
Solubility	50 % (NIOSH, 2024)
Solubility	In water, 502,000 mg/L at 25 °C
Solubility	50%
Density	1.4014 at 20 °C

Physical description & handling notes

• 2,2-dichloropropionic acid appears as a colorless liquid. Soluble in water. Corrosive to metals and tissue. Used as a herbicide.
• Colorless liquid with an acrid odor. [herbicide] [Note: A white to tan powder below 46 degrees F. The sodium salt, a white powder, is often used.]; [NIOSH]
• HYGROSCOPIC WHITE SOLID IN VARIOUS FORMS OR COLOURLESS LIQUID.
• Colorless liquid with an acrid odor.
• Liquid
• Colorless liquid [Note: A white to tan powder below 46 degrees F. The sodium salt, a white powder, is often used].

GHS Hazard Classification

Reported hazard statements	H315, H318, H412, H302 (14%), H335, H313, H316, H320

Documented Uses

• Selective herbicide; growth regulator; [HSDB]
• No longer produced or used in the USA; [HSDB]
• In non-crop areas such as roadsides, railways, ditches. Also in certain established crops such as alfalfa, asparagus, flax, potatoes, rape seed, sugar beets.
• For quackgrass, bermudagrass, johnsongrass, other perennial and annual grasses, cattails, rushes. Often preplant for established perennial grasses in cropland, noncropland areas, irrigation ditch banks. Translocates to the roots of most species as a growth regulator.
• For more Uses (Complete) data for DALAPON (6 total), please visit the HSDB record page.
• ... 2,2-Dichloropropionic acid can be made by chlorination of propionic acid, propionaldehyde, or propanol.

Synonyms

DALAPON; 2,2-Dichloropropionic acid; 75-99-0; 2,2-Dichloropropanoic acid; Alatex; Kenapon; Proprop; Basinex P; Liropon; Unipon; Dawpon-Rae; Dowpon M; Crisapon; Revenge; Basfapon B; BH dalapon

Frequently Asked Questions

What are the CAS number and molecular formula of 2,2-Dichloropropionic acid?

CAS 75-99-0; molecular formula C3H4Cl2O2; molecular weight — g/mol.

What other names is 2,2-Dichloropropionic acid known by?

DALAPON, 2,2-Dichloropropionic acid, 75-99-0, 2,2-Dichloropropanoic acid, Alatex, Kenapon.

Is 2,2-Dichloropropionic acid classified as hazardous?

Hazard statements reported: H315, H318, H412, H302, H335.

What are the key physical properties of 2,2-Dichloropropionic acid?

Boiling Point: 374 °F at 760 mmHg (USCG, 1999); Boiling Point: 190 °C; Boiling Point: 374 °F; Melting Point: 46 °F (USCG, 1999).

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.