(Also known as: decachlor; dienochlore; HRS 1654; HRS 16A)
SUMMARY
Dienochlor is an obsolete organochlorine insecticide. It has a low aqueous solubility and is quite volatile. Its data suggests it is persistent in soils. It is not toxic to mammals but does high a potential for bioaccumulation. Dienochlor has a moderate toxicity to aquatic invertebrates but considered to be more toxic to fish. It is relatively non-toxic to birds
Data alerts
The following alerts are based on the data in the tables below. An absence of an alert does not imply the substance has no implications for human health, biodiversity or the environment but just that we do not have the data to form a judgement.
Environmental fate
Ecotoxicity
Human health
Environmental fate High alert: Potential for particle bound transport: High
Warning: Significant data are missing
Ecotoxicity High alert: Fish acute ecotoxicity: High
Human health Low alert
GENERAL INFORMATION
Description
An obsolete insecticide once used to control of plant-damaging mites on ornamentals
Example pests controlled
Various mites including two-spotted spider, tumid spider, strawberry spider, spruce spider, citrus red, European red, carmine, clover, McDaniel mite and the privet mite
Example applications
Ornamental shrubs and trees outside and within greenhouses
Efficacy & activity
-
Availability status
Considered obsolete but may be available in some countries
Introduction & key dates
1964, first reported
UK regulatory status
UK COPR regulatory status
Not approved
Date COPR inclusion expires
Expired
UK LERAP status
No UK approval for use
EC Regulation 1107/2009 (repealing 91/414)
EC Regulation 1107/2009 status
Not approved
Dossier rapporteur/co-rapporteur
-
Date EC 1107/2009 inclusion expires
Expired
EU Candidate for substitution (CfS)
Not applicable
Listed in EU database
Yes
Approved for use (✓) under EC 1107/2009 in the following EU Member States
Example manufacturers & suppliers of products using this active now or historically
Novartis
Dow
Hooker: Zoecon
Example products using this active
Pentac
Formulation and application details
Usually supplied as a wettable powder or as flowable concentrates
ENVIRONMENTAL FATE
Property
Value
Source; quality score; and other information
Interpretation
Solubility - In water at 20 °C (mg l⁻¹)
0.025
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
Low
Solubility - In organic solvents at 20 °C (mg l⁻¹)
590000
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
Toluene
-
47700
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
n-Octanol
-
Melting point (°C)
122
Q3 Q = Miscellaneous internet resources 3 = Unverified data of known source
-
Boiling point (°C)
-
-
-
Degradation point (°C)
250
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
-
Flashpoint (°C)
-
-
-
Octanol-water partition coefficient at pH 7, 20 °C
P
6.92 X 1003
Calculated
-
Log P
3.84
Q3 Q = Miscellaneous internet resources 3 = Unverified data of known source
High
Fat solubility of residues
Solubility
Likely to be soluble
Q3 Q = Miscellaneous internet resources 3 = Unverified data of known source
-
Data type
Based on chemical group
Q3 Q = Miscellaneous internet resources 3 = Unverified data of known source
-
Density (g ml⁻¹)
1.94
Q2 Q = Miscellaneous internet resources 2 = Unverified data of unknown source
-
Dissociation constant pKa) at 25 °C
-
-
-
-
Vapour pressure at 20 °C (mPa)
1.3
G3 G = Extension Toxicology network database EXTOXNET (click here ) 3 = Unverified data of known source
Low volatility
Henry's law constant at 25 °C (Pa m³ mol⁻¹)
69.3
Q3 Q = Miscellaneous internet resources 3 = Unverified data of known source
Moderately volatile
Maximum UV-vis absorption L mol⁻¹ cm⁻¹
-
-
-
Surface tension (mN m⁻¹)
-
-
-
Degradation
Property
Value
Source; quality score; and other information
Interpretation
General biodegradability
-
Soil degradation (days) (aerobic)
DT₅₀ (typical)
300
DW4 DW = Don Wauchope personal database for Pka data: Wauchope, R. D. and Edwards, J. Dissociation constants for pesticide active ingredients: a database and comparison with predicted values. MS in preparation 4 = Verified data
Persistent
DT₅₀ (lab at 20 °C)
-
-
-
DT₅₀ (field)
-
-
-
DT₉₀ (lab at 20 °C)
-
-
-
DT₉₀ (field)
-
-
-
DT₅₀ modelling endpoint
-
-
-
Note
Best available data
Dissipation rate RL₅₀ on plant matrix
Value
-
-
-
Note
-
Dissipation rate RL₅₀ on and in plant matrix
Value
-
-
-
Note
-
Aqueous photolysis DT₅₀ (days) at pH 7
Value
-
-
-
Note
-
Aqueous hydrolysis DT₅₀ (days) at 20 °C and pH 7
Value
-
-
-
Note
-
Water-sediment DT₅₀ (days)
-
-
-
Water phase only DT₅₀ (days)
-
-
-
Soil adsorption and mobility
Property
Value
Source; quality score; and other information
Interpretation
Linear
Kd
-
Q3 Q = Miscellaneous internet resources 3 = Unverified data of known source
Slightly mobile
Koc
783
Notes and range
Literature range 196-1000 mL g⁻¹
Freundlich
Kf
-
-
-
Kfoc
-
1/n
-
Notes and range
-
pH sensitivity
-
Fate indices
Property
Value
Source; quality score; and other information
Interpretation
GUS leaching potential index
2.74
Calculated
Transition state
SCI-GROW groundwater index (μg l⁻¹) for a 1 kg ha⁻¹ or 1 l ha⁻¹ application rate
Value
2.35 X 10-01
Calculated
-
Note
-
Potential for particle bound transport index
High
Calculated
-
Potential for loss via drain flow
Slightly mobile
Calculated
-
Bio-concentration factor
BCF (l kg⁻¹)
2700000
Q2 Q = Miscellaneous internet resources 2 = Unverified data of unknown source
Estimated
High potential
CT₅₀ (days)
Not available
-
Known metabolites
None
ECOTOXICOLOGY
Terrestrial ecotoxicology
Property
Value
Source; quality score; and other information
Interpretation
Mammals - Acute oral LD₅₀ (mg kg⁻¹)
> 3160
G3 G = Extension Toxicology network database EXTOXNET (click here ) 3 = Unverified data of known source
Rat
Low
Mammals - Short term dietary NOEL
(mg kg⁻¹)
6.3
G3 G = Extension Toxicology network database EXTOXNET (click here ) 3 = Unverified data of known source
Lewis, K.A., Tzilivakis, J., Warner, D. and Green, A. (2016) An international database for pesticide risk assessments and management. Human and Ecological Risk Assessment: An International Journal, 22(4), 1050-1064. DOI: 10.1080/10807039.2015.1133242