(Also known as: heptachlore; E3314; H-34; OMS 193)
SUMMARY
Heptachlor in an insecticide. It has a low aqueous solubility but is highly soluble in most organic solvents. It is volatile and has low potential for leaching to groundwater. heptachlor can be persistent in soil systems but is not generally persistent in water systems. It is moderately toxic to mammals and may bioaccumulate. heptachlor may also cause adverse reproduction/development effects and is a neurotoxin. It is moderately toxic to birds but highly toxic to honeybees and most aquatic species.
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: Persistent; Potential for particle bound transport: High
Ecotoxicity High alert: Fish acute ecotoxicity: High; Daphnia acute ecotoxicity: High; Bees acute contact ecotoxicity: High
Human health High alert: Carcinogen; Reproduction/development effects; Neurotoxicant
GENERAL INFORMATION
Description
An obsolete insecticide once used to kill termites, ants and other insects in agricultural and domestic situations
Example pests controlled
Ants; Termites; Cutworms; Maggots; Spittlebugs; Weevils; Wireworms; Japanese beetles; Mosquitoes
Example applications
Corn; Sorghum; Small grains
Efficacy & activity
-
Availability status
Considered obsolete but may be available in some countries; Banned in many countries
Introduction & key dates
1951, 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)
-
Listed in EU database
Yes
Approved for use (✓) under EC 1107/2009 in the following EU Member States
Chemical subject to PIC regulations; POP - regulated by Stockholm Convention; LRTAP Annex 1; OSPAR soc; Severe Marine Pollutant; Rotterdam Convention (Class O)
Other sources: DT₅₀ around 2 yrs (R3), 9-10 months (R3)
Dissipation rate RL₅₀ on plant matrix
Value
-
-
-
Note
-
Dissipation rate RL₅₀ on and in plant matrix
Value
4.8
R4 R = Peer reviewed scientific publications 4 = Verified data
-
Note
Published literature RL₅₀ range 1.0-13.5 days, 4 field crops, various matrices, n=5
Aqueous photolysis DT₅₀ (days) at pH 7
Value
-
-
-
Note
-
Aqueous hydrolysis DT₅₀ (days) at 20 °C and pH 7
Value
1
R3 R = Peer reviewed scientific publications 3 = Unverified data of known source
Non-persistent
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
-
G3 G = Extension Toxicology network database EXTOXNET (click here ) 3 = Unverified data of known source
Non-mobile
Koc
24000
Notes and range
Other sources: 21878 mL g⁻¹ (R3)
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
-0.91
Calculated
Low leachability
SCI-GROW groundwater index (μg l⁻¹) for a 1 kg ha⁻¹ or 1 l ha⁻¹ application rate
Value
5.35 X 10-03
Calculated
-
Note
Estimated concentrations of chemicals with Koc values greater than 9995 ml g⁻¹ are beyond the scope of the regression data used in SCI-GROW development. If there are concerns for such chemicals, a higher tier groundwater exposure assessment should be considered, regardless of the concentration returned by SCI-GROW
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
Environmental fate
