Chemical name (IUPAC)

Prop-2-ynyl (R)-2-[4-(5-chloro-3-fluoro-pyridin-2-yloxy)-phenoxy]-propionionate

Chemical name (CA)

(R)-2-[4-[(5-chloro-3-fluoro-2-pyridinyl)oxy]phenoxy]-propanoic acid 2-propynyl ester

CIPAC No

683.225

Molecular formula

C₁₇H₁₃ClFNO₄

Molecular mass

349.8

Structural formula

Melting point (state purity)

59.5°C                  (995 g/kg)

Boiling point (state purity)

Thermal decomposition starts at about 285°C
100.6°C at 0.082 Pa      (999 g/kg)

Temperature of decomposition

Thermal decomposition starts at about 285°C

Appearance (state purity)

White crystalline powder       (995 g/kg)

Light beige powder (973 g/kg)

Relative density (state purity)

1.35 g/cm³            (999 g/kg)

Surface tension

s = 72.3 mN/m at 20°C and 90 % saturation concentration

Vapour pressure (in Pa, state temperature)

3.19 · 10^-6 Pa  at 25°C

Henry’s law constant (Pa m³ mol ^-1)

2.8 · 10^-4 Pa · m³ / mol

Solubility in water (g/l or mg/l, state temperature)

4.0 mg/l at 25°C

Solubility in organic solvents (in g/l or mg/l,

state temperature)

At 25°C:

acetone          > 500 g/l
dichloromethane    > 500 g/l
ethyl acetate   > 500 g/l
hexane               7.5 g/l
methanol           180 g/l
octanol                21 g/l
toluene          > 500 g/l

Partition co-efficient (log P_OW) (state pH and temperature)

Log Pow = 3.90 ± (0.15)  at 25°C in pure water

No pH effect as there is no dissociation

Clodinafop (CGA 193469):

Log Pow =  -0.44  at 25°C and pH 6.9 (neutral+ionized)

Log Pow =  3.5  at 25°C and pH 6.9 (neutral species)

CGA 193468:

Log Pow = 3.0 at 25°C and pH 7

CGA 302371:

Log Pow = 0.52  at 25°C and pH 7.0

Hydrolytic stability (DT₅₀) (state pH and

temperature)

pH 4       t_0.5 = 17.9  days    at 25°C

pH 5       t_0.5 = 26.8  days    at 25°C

pH 7       t_0.5 = 4.8  days      at 25°C

pH 9       t_0.5 = 0.07  days    at 25°C

Dissociation constant

No dissociation constant within the range 2 to 12

UV/VIS absorption (max.) (if absorption

> 290 nm state S at wavelength)

Molar extinction coefficients:

neutral            at 226 nm       15982 l/mol × cm
              at 279 nm         4910 l/mol × cm

              at 290 nm         3550 l/mol × cm

acidic             at 226 nm       18988 l/mol × cm
              at 279 nm         6382 l/mol × cm

basic              at 227 nm       19045 l/mol × cm
              at 280 nm         6745 l/mol × cm

Photostability (DT₅₀) (aqueous, sunlight, state pH)

At pH 5 and 25°C the DT50 was determined as 24.23 days using a xenon lamp with intensity adjusted to natural sunlight. Only one degradation product was formed > 10%: CGA 193469.

Quantum yield of direct photo transformation in water at S > 290 nm

F = 0.0237

Flammability

Clodinafop-propargyl is not considered highly flammable

Explosive properties

Clodinafop-propargyl is not considered an explosive