plant growth regulator used to promote fruit ripening. Also stimulates latex flow in rubber trees.

Merriam-Webster Online Dictionary
ethephon (noun)
a synthetic plant growth regulator CHClOP that induces flowering and abscission by promoting the release of ethylene and has been used to cause early ripening (as of apples on the tree) - 2 6 3
ethephon (Wikipedia)
Ethephon
Skeletal formula
Ball-and-stick model of the ethephon
Names
IUPAC name
2-Chloroethylphosphonic acid
Other names
Bromeflor
Arvest
Ethrel
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.037.002
KEGG
UNII
Properties
C2H6ClO3P
Molar mass 144.49 g·mol−1
Density 1.409 g/cm3
Melting point 74 °C (165 °F; 347 K)
123.9 g/100 mL (23 °C)
Hazards
Main hazards Corrosive
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Ethephon is a plant growth regulator.

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