Dicyclopentadiene
Last updated: 22/01/2023
(Also known as: cyclopentadiene dimer; DCPD)
Dicyclopentadiene is manufacturered from high temperature cracking of petroleum fractions in an ethylene manufacturing process. It is used in the manufacturer of some pesticides, as a grass growth regulator and, in some instances, as a mammal repellent. It has a low aqueous solubility, is highly volatile and flammable, and may be environmentally persistent. It is moderately toxic to mammals via ingestion but more so if the vapour is inhaled. It may cause chemical burns in contact with the skin and is a recognised irritant. It is moderately toxic to many animal and plant species..
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
An unclassified plant growth regulator, pesticide intermediate and animal repellent
Large mammals including dogs, cats, rats, rabbits, hares, deer; Grass growth
Grass, Lawns, Turf
-
Considered obsolete but may be available in some countries
-
Not approved
Expired
No UK approval for use
EC Regulation 1107/2009 (repealing 91/414)
Not approved
Not applicable
Expired
Not applicable
Yes
ATAustria
BEBelgium
BGBulgaria
CYCyprus
CZCzech Republic
DEGermany
DKDenmark
EEEstonia
ELGreece
 
 
 
 
 
 
 
 
 
ESSpain
FIFinland
FRFrance
HRCroatia
HUHungary
IEIreland
ITItaly
LTLithuania
LULuxembourg
 
 
 
 
 
 
 
 
 
LVLatvia
MTMalta
NLNetherlands
PLPoland
PTPortugal
RORomania
SESweden
SISlovenia
SKSlovakia
 
 
 
 
 
 
 
 
 
ISIceland
NONorway
 
 
 
 
 
 
 
 
 
An epimeric molecule
C₁₀H₁₂
C1C=CC2C1C3CC2C=C3
C\2=C\C3C1/C=C\C(C1)C3C/2
HECLRDQVFMWTQS-UHFFFAOYSA-N
InChI=1S/C14H18N6O7S/c1-5-27-12(21)8-7-15-20(2)11(8)28(23,24)19-14(22)18-13-16-9(25-3)6-10(17-13)26-4/h6-7H,5H2,1-4H3,(H2,16,17,18,19,22)
Yes
Plant Growth Regulator, Repellent
Cyclic olefin compound
-
-
Synthetic
Various routes, acts as a repellent via odour but is also a stomach and vapour toxin
77-73-6
201-052-9
None allocated
-
6492
601-044-00-9
132.20
-
3a,4,7,7a-tetrahydro-4,7-methano-1H-indene
dicyclopentadiene
-
-
Not applicable
Not applicable
Not applicable
Not applicable
-
White cyrstalline solid at room temperature in its pure form and has a characteristic odour. Commercial products may be a colourless liquid.
Obsolete - not thought to be commercially available for crop protection applications
Was often supplied as impregnated strips for tree use or as a soluble concentrate for use as an aqueous spray
26.5
T4 T = UN EPFA database. Dataset no longer available. 4 = Verified data
Low
-
-
-
33.6
T4 T = UN EPFA database. Dataset no longer available. 4 = Verified data
-
-
-
-
-
-
-
-
-
-
6.03 X 1002
Calculated
-
2.78
T4 T = UN EPFA database. Dataset no longer available. 4 = Verified data
Moderate
-
-
-
-
-
-
0.977
T4 T = UN EPFA database. Dataset no longer available. 4 = Verified data
-
-
-
-
-
1.3 X 1006
T4 T = UN EPFA database. Dataset no longer available. 4 = Verified data
Highly volatile
6.38 X 1003
Volatile
-
-
-
-
-
-
-
2000
Q3 Q = Miscellaneous data from online sources 3 = Unverified data of known source
Very persistent
2000
Q3 Q = Miscellaneous data from online sources 3 = Unverified data of known source
Very persistent
-
-
-
-
-
-
-
-
-
-
-
-
Other sources: DT₅₀ 4-7 years
-
-
-
-
-
-
-
-
Stable
Q3 Q = Miscellaneous data from online sources 3 = Unverified data of known source
Stable
-
Stable
Q3 Q = Miscellaneous data from online sources 3 = Unverified data of known source
Stable
-
-
-
-
-
-
-
Soil adsorption and mobility
-
Q2 Q = Miscellaneous data from online sources 2 = Unverified data of unknown source
Slightly mobile
1478
Estimated
-
-
-
-
-
-
-
2.74
Calculated
Transition state
2.07 X 10-01
Calculated
-
-
High
Calculated
-
Slightly mobile
Calculated
-
221
Q3 Q = Miscellaneous data from online sources 3 = Unverified data of known source
Whole fish
Threshold for concern
Not available
-
None
Terrestrial ecotoxicology
750
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
Rat
Moderate
-
-
-
-
-
-
-
-
1010
Unknown species
Moderate
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Non-toxic
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
Non-toxic
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
15.9
Oncorhynchus mykiss
Moderate
-
-
-
10.5
Daphnia magna
Moderate
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
HUMAN HEALTH AND PROTECTION
High (class III)
-
-
750
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
Rat
Moderate
5080
Q3 Q = Miscellaneous data from online sources 3 = Unverified data of known source
Rat
-
1.0
Q3 Q = Miscellaneous data from online sources 3 = Unverified data of known source
Rat 4 hr
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Low risk to Europeans as no longer approved for use
Workers may become exposed via inhalation, skin absorption and ingestion
EU MRL pesticide database 
-
-
-
-
-
-
-
-
-
-
Carcinogen
Endocrine disruptor
No data found
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
; E0 E = Unspecified genotoxicity type (miscellaneous data source) 0 = No data
No data found
Reproduction / development effects
Acetyl cholinesterase inhibitor
Neurotoxicant
No data found
XNo, known not to cause a problem
No data found
Respiratory tract irritant
Skin irritant
Skin sensitiser
✓Yes, known to cause a problem
✓Yes, known to cause a problem
No data found
Eye irritant
Phototoxicant
 
✓Yes, known to cause a problem
No data found
 
Moderately toxic Ingestion may damage nervous system and/or liver and kidney damage May cause chemical burns in contact with tissue,
Mixtures of the vapour with air are explosive May react with oxygen Flammable
Health: H302
Not listed
-
-
dicyclopentadiene
dicyclopentadiène
Dicyclopentadien
dicyclopentadien
diciclopentadiene
diciclopentadiene
-
dicyklopentadien
-
-
-
-
Record last updated:
22/01/2023
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