(Z)-6-heneicosen-11-one |

Last updated: 23/08/2025
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(Also known as: Douglas fir tussock moth sex pheromone; Straight Chain Lepidopteran Pheromone; SCLP; (Z)-6-heneicosen-11-one; (6Z)-heneicos-6-en-11-one) |
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. These hazard alerts do not take account of usage patterns or exposure, thus do not represent risk.
Environmental fate |
Ecotoxicity |
Human health |
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A naturally occurring substance used as an insect attractant and lure |
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Douglas fir tussock moth (Orgyia pseudotsugata) |
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Fir trees |
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- |
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- |
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- |
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Not approved |
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Not applicable |
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No UK approval for use as a plant protection agent |
EC Regulation 1107/2009 (repealing 91/414) |
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Not approved |
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Not applicable |
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Not applicable |
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Not applicable |
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No |
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ATAustria |
BEBelgium |
BGBulgaria |
CYCyprus |
CZCzech Republic |
DEGermany |
DKDenmark |
EEEstonia |
ELGreece |
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ESSpain |
FIFinland |
FRFrance |
HRCroatia |
HUHungary |
IEIreland |
ITItaly |
LTLithuania |
LULuxembourg |
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LVLatvia |
MTMalta |
NLNetherlands |
PLPoland |
PTPortugal |
RORomania |
SESweden |
SISlovenia |
SKSlovakia |
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ISIceland |
NONorway |
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- |
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C₂₁H₄₀O |
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CCCCC\C=C/CCCC(CCCCCCCCCC)=O |
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- |
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YLNMHCDVFVPONQ-QBFSEMIESA-N |
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InChI=1S/C21H40O/c1-3-5-7-9-11-13-15-17-19-21(22)20-18-16-14-12-10-8-6-4-2/h11,13H,3-10,12,14-20H2,1-2H3/b13-11- |
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Yes |
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Insecticide; Semiochemical |
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Pheromone |
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>94% |
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- |
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Natural |
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Functions as an insect attractant - mating disrupter |
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Originally isolated from the female Douglas fir tussock moth (Orgyia pseudotsugata) |
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Forestry |
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Douglas fir tussock moth (Orgyia pseudotsugata) |
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Fir trees |
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- |
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54884-65-4 |
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- |
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- |
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129064 |
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- |
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308.54 |
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- |
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(6Z)-henicos-6-en-11-one |
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(Z)-6-henicosen-11-one |
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- |
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- |
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- |
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Not applicable |
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Not applicable |
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Not known |
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Not applicable |
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- |
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Colourless liquid |
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Current |
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- |
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- Bedoukian Research, Inc
- Russell IPM
- Scentry Biologicals
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- Douglas fir tussock moth pheromone
- Douglas fir tussock moth pheromone trap
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Usually formulated for use in pheromone traps |
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The commercial production of pheromone attractants and lures involves a sophisticated blend of synthetic chemistry, entomology, and precision engineering. Manufacturers begin by identifying the specific pheromone compounds emitted by target pests, such as sex, aggregation, or alarm pheromones, and then replicate these molecules using chemical synthesis. |
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While exact CO₂e values are not published for specific pheromones, some general information is available. The PHERA reported that biotechnological production (e.g. yeast fermentation) of pheromones can reduce GHG emissions by up to 90% compared to traditional chemical synthesis and GHG emissions are typically in the 5 to 10 kg CO₂e per kg of pheromone produced. Other sources suggest that small scale pheromone synthesis typically has emissions in the range 1 – 3 kg CO₂e per kg of pheromone produced. |
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0.886 |
Q3 Q = Miscellaneous data from online sources 3 = Unverified data of known source |
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86 |
Q3 Q = Miscellaneous data from online sources 3 = Unverified data of known source |
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As this parameter is not normally measured directly, a surrogate measure is used: ‘Photochemical oxidative DT₅₀’. Where data is available, this can be found in the Fate Indices section below. |
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Soil adsorption and mobility |
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None
Terrestrial ecotoxicology |
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> 15000 |
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source Rat |
Low |
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Q3 Q = Miscellaneous data from online sources 3 = Unverified data of known source No adverse effects identified or expected |
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Q3 Q = Miscellaneous data from online sources 3 = Unverified data of known source No adverse effects identified or expected |
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Q3 Q = Miscellaneous data from online sources 3 = Unverified data of known source No adverse effects identified or expected |
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HUMAN HEALTH AND PROTECTION |
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> 15000 |
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source Rat |
Low |
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3000 |
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source Rabbit |
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Carcinogen |
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Endocrine disruptor |
XNo, known not to cause a problem |
A0 A = Chromosome aberration (EFSA database) 0 = No data ; B0 B = DNA damage/repair (EFSA database) 0 = No data ; C0 C = Gene mutation (EFSA database) 0 = No data ; D0 D = Genome mutation (EFSA database) 0 = No data ; E3 E = Unspecified genotoxicity type (miscellaneous data source) 3 = Negative |
XNo, known not to cause a problem |
Reproduction / development effects |
Acetyl cholinesterase inhibitor |
Neurotoxicant |
XNo, known not to cause a problem |
XNo, known not to cause a problem |
XNo, known not to cause a problem |
Respiratory tract irritant |
Skin irritant |
Skin sensitiser |
?Possibly, status not identified |
?Possibly, status not identified |
No data found |
Eye irritant |
Phototoxicant |
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?Possibly, status not identified |
No data found |
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No significant adverse human health issues identified |
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Will emit acrid smoke with irritating vapours if heated to decomposition |
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Not listed (Not listed) |
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Not regulated |
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(Z)-6-heneicosen-11-one |
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Record last updated: |
23/08/2025 |
Contact: |
aeru@herts.ac.uk |
Please cite as: |
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 |