Plant hormone (4-Chlorophenoxy)acetic acid 4-CPA 98%

Purity

98% min

Loss on dry

1.0% min

Residue after ignition

0.1% min

Product Name

4-CPA; 4-Chlorophenoxyacetic Acid 

CAS NO.

122-88-3

EINECS NO.

204-581-3

Synonyms

Acetic acid, (p-chlorophenoxy)-; Acetic acid, (4-chlorophenoxy)-; BI 12; p-Chlorophenoxyacetic acid; (4-Chlorophenoxy)acetic acid; 4-CP; 4-CPA; Parachlorophenoxyacetic acid; PCPA;

Physical and

Chemical  Properties

Molecular Formula: C₈H₇ClO₃

Molecular Weight: 186.59

Form: Colourless crystals. 

Melting point: 157-159 deg C

Odor: Odorless

Solubility: Sparingly soluble in water. Readily soluble in most organic solvents. 4-CPA sodium salt is soluble in water.

Stability: It is stable at elevated temperatures (54 deg C) and on exposure to metals, but degrades (30% loss in 24 hours) on exposure to sunlight.

Chemical structural formula

Toxicology

Oral: Acute oral LD₅₀ for rats 2200 mg/kg.

Skin and eye: Acute percutaneous LD₅₀ >2000 mg/kg. Not a skin irritant. Inhalation: LC₅₀ 10.6 mg/l.

Toxicity class: WHO (a.i.) III

EPA (formulation): III

EC classification: Xn; R22 (also assigned to diethanolamine salt)