Peer Review of the pesticide risk assessment of the active substance bitertanol
19
EFSA Journal 2010;8(10):
Physical and chemical properties (Annex IIA, point 2)
Melting point (state purity)
‡
118 °C (Eutectic mix)
Boiling point (state purity)
‡
Not measured, decomposes above 300 C
Temperature of decomposition (state purity)
>300 °C (98.7)
Appearance (state purity)
‡
White solid (pure – 96.7%)
White greyish solid (technical)
Vapour pressure (state temperature, state
purity)
‡
Diastereoisomer A = 2.2 x 10
-10
Pa at 20 C (99.4%)
Diastereoisomer B = 2.5 x 10
-9
Pa at 20 C (97.4%)
Henry‟s law constant
‡
Diastereoisomer A = 2 x 10
-8
Pa m
3
/mol at 20 C
Diastereoisomer B = 5 x 10
-7
Pa m
3
/mol at 20 C
Solubility in water (state temperature, state
purity and pH)
‡
0.0038 g/l (Diastereoisomer A and B) at an
unspecified pH and 20 C (solubility was stated to
be unaffected by pH) (96.7%)
Diastereoisomer A: 0.0027 g/l at 20 °C
Diastereoisomer B: 0.0011 g/l at 20 °C
Solubility in organic solvents
‡
(state temperature, state purity)
Diastereoisomer A+B
n-heptane 0.44g/l at 20 C (96.7%)
xylene 18 g/l at 20 C (96.7%)
dichloromethane >250g/l at 20 C (96.7%)
2-propanol 67g/l at 20 C (96.7%)
1-octanol 53g/l at 20 C (96.7%)
polyethylene glycol 120g/l at 20 C (96.7%)
acetone 200g/l at 20 C (96.7%)
ethyl acetate 150g/l at 20 C (96.7%)
acetonitrile 79g/l at 20 C (96.7%)
dimethlsulfoxide >250g/l at 20 C (96.7%)
Surface tension
‡
(state concentration and temperature, state
purity)
64 mN/m at 20 °C (96.7%)
Partition co-efficient
‡
(state temperature, pH and purity)
Diastereoisomer A - Log Pow = 4.04 at 20 C
(96.7%)
Diastereoisomer B - Log Pow = 4.15 at 20 C
(96.7%)
Dissociation constant (state purity)
‡
No dissociation
UV/VIS absorption (max.) incl.
‡
(state purity, pH)
Diastereoisomer A = UV absorb 255 nm ( =22059 l
mol
-1
cm
-1
) (96.7%).
No UV absorbance above 290 nm.
Diastereoisomer B = UV absorb 255 nm ( =21097 l
mol
-1
cm
-1
) (96.7%).
No UV absorbance above 290 nm.