≥99,5 %, for synthesisEthyl acetate, Acetic ester

(1977) Fate anddistribution of the herbicides 2,4-dichlorophenoxyacetic acid (2,4-D)and 2,4,5-trichlorophenoxyacetic acid (2,4,5-T) in the dogfish shark.

Capping is realized through a short treatment of the peptide resin with a large excess of a highly reactive unhindered acid derivative and abase, usually acetic anhydride or benzoyl chloride and pyridine. At the end of the capping step the reagents are filtered off and the resin is carefully washed before proceeding to the next deprotection step.

(Acetic acid, 2-azido-methyl ester)

For that purpose a deficient amount of the C-terminal or penultimate Fmoc amino acid is coupled to the unloaded or preloaded resin. The resulting load is determined and when the desired level of substitution has been reached the remaining free amino groups are blocked by acetylation.

(1972b) The effect of 2,4-dichlorophenoxyacetic acid on laying hens.

gorbuscha stat 10 10-34 isooctyl 96-h LC0 < 1 (1974)Chum salmon (fry) stat 10 10-34 free acid 96-h LC0 10 Meehan (Oncorhynchus keto) stat 10 10-34 butyl ester 96-h LC0 < 1 et al.

(1974) Renal tubular transfer of phenoxyacetic acids in the chicken.

Toxicity of 2,4-D to fish: no-observed-effect levels---------------------------------------------------------------------------------------------------------Organism Flow/ Temp Alkali- Hard- pH Formulationc Parameter Water Reference stata (°C) nityb nessb concentration (mg/litre)---------------------------------------------------------------------------------------------------------Pink salmon (fry) stat 10 10-34 free acid 96-h LC0 < 1 Meehan (Oncorhynchus stat 10 10-34 butyl ester 96-h LC0 < 1 et al.

2,4-dichlorophenoxyacetic acid in leaves of red- and blackcurrant.

General Introduction Many studies of the toxicity of 2,4-D were carried out before the possible toxicological importance of manufacturing by-products, such as 2,6-dichlorophenoxyacetic acid, 2,4,6-trichlorophenoxy-acetic acid (2,6-D and 2,4,6-T) monochlorophenoxyacetic acid, or N-nitroso compounds, was known or appreciated.

(1963) Toxicity of 2,4-dichlorophenoxyacetic acid for man and dog.

(Oncorhynchus kisutch) stat 10 10-34 isooctyl 96-h LC0 10 (1974)Dolly Varden stat 10 10-34 free acid 96-h LC0 50 Meehan (fingerling) stat 10 10-34 butyl ester 96-h LC0 < 1 et al.

(1975) [Urinary excretion of 2,4-dichlorophenoxyacetic acid.] Rocz.

However, at 88 mg/litre, growth was inhibited,photosynthesis was no different from controls, and the cell content ofcarbohydrate, protein, and nucleic acids was decreased.