4-Chlorophenoxyacetic acid

Public-database records for 4-Chlorophenoxyacetic acid (CAS 122-88-3), reproduced here for independent cross-checking.

Safety classification and hazard statements

Physical description and handling notes

• Odorless solid; [HSDB] White or off-white powder; [MSDSonline]
• Prisms or needles from water
• It is stable at elevated temperatures (54 °C) and on exposure to metals, but degrades (30% loss in 24 hours) on exposure to sunlight.
• When heated to decomposition it emits toxic fumes of /hydrogen chloride/.
• Odorless
• 140.9 Ų [M-H]- [CCS Type: DT; Buffer gas: N2; Ionization: ESI-; Dataset: TOXCAST; Source Identifier: DTXSID9034282]

Reported physical properties

How this substance is indexed

Documented uses

• Used as a specialized plant growth regulator to improve fruit set in tomatoes, berries, and other fruit; May also be used to replace pollination; [HSDB] Used to regulate root growth of mung beans in seed germination; [Reference #1]
• Registration cancelled for use on tomatoes in 1994; [Reference #1]
• ... Specific plant growth regulator to improve fruit set in tomatoes; it can also replace pollination.
• Reagent grade p-chlorophenoxyacetic acid was found to contain 2,4-D as an impurity (1.0%) as well as traces of 2,4-dichlorophenols.
• Acetic acid, 2-(4-chlorophenoxy)-: ACTIVE
• SPRAY APPLICATION OF 4-CHLOROPHENOXYACETIC ACID (2 AND 4 PPM) TO GRAPES INCREASED BERRY SET SIGNIFICANTLY OVER CONTROLS. BERRY SET INCREASED WITH INCREASE IN 4-CHLOROPHENOXYACETIC ACID CONCN. BERRY DROP WAS ALSO SIGNIFICANTLY REDUCED, AND WITH INCREASED AUXIN CONCN CORRESPONDING DECREASE IN BERRY DROP WAS OBSERVED. PANICLE DRYING WAS SEVERE IN THIS CULTIVAR WHICH WAS EFFECTIVELY REDUCED BY AUXIN APPLICATION.

Names this substance appears under

4-CHLOROPHENOXYACETIC ACID; 122-88-3; (4-Chlorophenoxy)acetic acid; Sure-Set; Acetic acid, (4-chlorophenoxy)-; Tomato Fix; Tomato hold; (p-Chlorophenoxy)acetic acid; p-Chlorophenoxyacetic acid; Acetic acid, (p-chlorophenoxy)-; 4CPA; Parachlorophenoxyacetic acid; BI 12; NSC 8769; TOMATONE; DTXSID9034282

Computed molecular descriptors

Database abstract

4-Chlorophenoxyacetic acid · CAS 122-88-3 · C8H7ClO3. UNII 4EMM3U5P3K. 熔点: 156.5 °C; 溶解度: In water, 957 mg/L at 25 °C; 蒸气压: 0.000318 [mmHg].

Source: PubChem / Wikidata; the batch COA governs where values differ.