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Synonyms: 2-chloroethylphosphonic acid (IUPAC);'Cerone' (Bayer CropScience); 'Ethrel' (Bayer CropScience); 'Sierra' (Bayer CropScience); 'Cerafon' (Hermoo); 'Eteroc' (Rocca); 'Sunthephon' (Sundat); 'Super Boll' (Nufarm Americas); mixtures 'Finish' (+ cyclanilide) (Bayer CropScience); 'CottonQuik' (+ urea sulfate) (Arysta LifeScience, DuPont, Nufarm Ltd); 'Terpal' (+ mepiquat chloride) (BASF, Bayer CropScience, DuPont). Other products 'Camposan' (Bayer CropScience); 'Charger' (Bayer CropScience); 'Etheverse' (Bayer CropScience); 'Florel' (Bayer CropScience); 'Prep' (Bayer CropScience); 'Tomathrel' (Bayer CropScience); 'Agritrel' (Cequisa); 'Boll Buster' (Loveland, UAP); 'Boll'd' (Winfield Solutions); 'Boost' (Vapco); 'Coolmore' (Barclay); 'Cybele' (Phyteurop); 'Eteplus' (Hermoo); 'Ethapon' (Plaaskem S.A.); 'Ethefix' (Hermoo); 'Ethefol' (Indofil); 'Etheplus' (Hermoo); 'Ethepro' (Protex); 'Ethio' (Agrochem); 'Flash' (Helena); 'Flordimex' (Cequisa); 'Galleon' (Nufarm Ltd); 'Halmstarker' (Stefes); 'Kripon' (Krishi Rasayan); 'Looping' (Arysta LifeScience EAME); 'Mature' (Fair); 'Phosgrow' (Sabero); 'Pilarfon' (Pilarquim); 'Ripex' (Jubilant Organosys); 'Setup' (Makhteshim-Agan)
CAS No.: 16672-87-0
EC No.: 240-718-3
Molecular Weight: 144.49
Molecular Formula: C2H6ClO3P
Structural Formula: Ethephon
M.p.: 74 deg.C
B.p.: c. 265 °C (decomp.)
V.p.: <0.01 mPa (20 °C)
Kow: logP <–2.20 (25 °C, unstated pH)
Henry: <1.55 × 10-9 Pa m3 mol-1 (calc.)
S.g./density: 1.409±0.02 (20 °C) (tech.)
Solubility: In water 800 g/l (pH 4). Readily soluble in methanol, ethanol, isopropanol, acetone, diethyl ether and other polar organic solvents. Sparingly soluble in non-polar organic solvents such as benzene and toluene. Insoluble in kerosene and diesel oil.
Stability: Stable in aqueous solutions having pH <5; at higher pH, decomposition occurs with the liberation of ethylene; DT50 2.4 d (pH 7, 25 °C). Sensitive to uv irradiation.
pKa: pKa1 2.5, pKa2 7.2


By metobolism-degradation, ethephone is converted into ethylene which can help the plant’s fruit to reach maturity more quickily. Ethephon is applied to promote pre-harvest ripening in apples, currants, blackberries, blueberries, cranberries, morello cherries, citrus fruit, figs, tomatoes, sugar beet and fodder beet seed crops, coffee, capsicums, etc.; to accelerate post-harvest ripening in bananas, mangoes and citrus fruit; to facilitate harvesting by loosening of the fruit in currants, gooseberries, cherries and apples; to increase flower bud development in young apple trees; to prevent lodging in cereals, maize and flax; to induce flowering of Bromeliads; to stimulate lateral branching in azaleas, geraniums and roses; to shorten the stem length in forced daffodils; to induce flowering and regulate ripening in pineapples; to accelerate boll opening in cotton; to modify sex expression in cucumbers and squash; to increase fruit setting and yield in cucumbers; to improve the sturdiness of onion seed crops; to hasten the yellowing of mature tobacco leaves; to stimulate latex flow in rubber trees, and resin flow in pine trees; to stimulate early uniform hull split in walnuts; etc. Maximum application rate per season 2.18 kg/ha for cotton, 0.72 kg/ha for cereals, 1.44 kg/ha for fruit.


TC: 80%; 85%; 90%
SL: 480g/L(40%w/w); 720g/L; 70%(w/w)

Standard Packaging

Net 200kg/drum for TC, 200L drum for SL

Packaging photo coming soon

Risks and Safety Information

Ethephone SL is corrosive Liquid, Hazard Class 8, UN 3265, PG III
Acute oral LD50 for rats 1564 mg/kg (tech.). Skin and eye Acute percutaneous LD50 for rabbits 1560 mg/kg (tech.). Irritating to skin and eyes. Birds Acute oral LD50 for bobwhite quail 1072 mg/kg (tech.). Dietary LC50 (8 d) for bobwhite quail >5000 ppm in diet (tech.). Fish LC50 (96 h) for carp >140, Daphnia EC50 (48 h) 1000 mg/l (tech.). Algae EC50 (24–48 h) for Chlorella vulgaris 32 mg/l.Bees Harmless to bees.

Warning, Corrosive

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