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dicyclopentadiene
** cyclopentadiene dimer ** DCPD ** Translations

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SUMMARY

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..

GENERAL INFORMATION Click here for an explantaion of the general chemical status information
for dicyclopentadiene

Description: An unclassified plant growth regulator, pesticide intermediate and animal repellent

Example pests controlled: Large mammals including dogs, cats, rats, rabbits, hares, deer; Grass growth

Example applications: Grass, Lawns, Turf

Efficacy & activity: -

Availability status: Obsolete

Introduction & key dates: -

EC Regulation 1107/2009 (repealing 91/414):
Status Not approved
Dossier rapporteur/co-rapporteur Not applicable
Date inclusion expires Expired
EU Candidate for substitution (CfS) Not applicable
Listed in EU database Yes

Approved for use () or known to be used () in the following European countries: Click to access a note on the approvals information on this site

AT

BE

BG

CY

CZ

DE

DK

EE

EL

ES

FI

FR

HR

HU

IE

IT

LT

LU

LV

MT

NL

PL

PT

RO

SE

SI

SK

UK

Chemical structure: Click here for further information on the general chemical status information used on this site
Isomerism A chiral molecule
Chemical formula C10H12
Canonical SMILES C1C=CC2C1C3CC2C=C3
Isomeric SMILES C\2=C\C3C1/C=C\C(C1)C3C/2
International Chemical Identifier key (InChIKey) HECLRDQVFMWTQS-UHFFFAOYSA-N
International Chemical Identifier (InChI) 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)
Structure diagram/image available? Yes

General status: Click here for further information on the general chemical status information used on this site
Pesticide type Plant growth regulator, Repellent
Substance group Hydrocarbon
Minimum active substance purity -
Known relevant impurities -
Substance origin Synthetic
Mode of action Various routes, acts as a repellent via odour but is also a stomach and vapour toxin
CAS RN 77-73-6
EC number 201-052-9
CIPAC number 8103
US EPA chemical code -
PubChem CID 6492
Molecular mass (g mol-1) 132.20
PIN (Preferred Identification Name) -
IUPAC name 3a,4,7,7a-tetrahydro-4,7-methano-1H-indene
CAS name dicyclopentadiene
Other status information -
Relevant Environmental Water Quality Standards -
Herbicide Resistance Classification (HRAC) Not applicable
Herbicide Resistance Classification (WSSA) Not applicable
Insecticide Resistance Classification (IRAC) Not applicable
Fungicide Resistance Classification (FRAC) Not applicable
Examples of recorded resistance -
Physical state White cyrstalline solid at room temperature in its pure form and has a characteristic odour. Commercial products may be a colourless liquid.
Related substances & organisms -

Formulations:
Property Click here for information on the general product and branding information used on this site Value
Example manufacturers & suppliers of products using this active now or historically
  • Staehler
  • Dow
Example products using this active -
UK LERAP status No UK approval for use as a pesticide under EC Regulation 1107/2009
Formulation and application details Usually supplied as impregnated strips for tree use or as a solublecontrate for use as an aqueous spray.


ENVIRONMENTAL FATE

for dicyclopentadiene

Property Click here for information on the parameters used to describe environmental fate on this site Value Source/Quality Score/Other Information Click here for information on the primary data sources used to populate this database with fate data Interpretation Click here for information on the way in which we interpret environmental fate data
Solubility - In water at 20oC (mg l-1) 26.5 T4 Low
Solubility - In organic solvents at 20oC (mg l-1) - - -
Melting point (oC) 33.6 T4 -
Boiling point (oC) - - -
Degradation point (oC) - - -
Flashpoint (oC) - - -
Octanol-water partition coefficient at pH 7, 20oC P 6.03 X 1002 Calculated -
Log P 2.78 T4 Moderate
Bulk density (g ml-1)/Specific gravity 0.977 T4 -
Dissociation constant (pKa) at 25oC - - -
Note:
Vapour pressure at 20oC (mPa) 1.3 X 1006 T4 Highly volatile
Henry's law constant at 25oC (Pa m3 mol-1) 6.38 X 1003 V3 Volatile
GUS leaching potential index Click here for a note on the limitations of the GUS 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 Click here for a note on the limitations of the SCI-GROW index Value 2.07 X 10-01 Calculated -
Note -
Potential for particle bound transport index Click here for a note on the limitations of the potential for particle bound transport index - Calculated High
Maximum UV-vis absorption L mol-1 cm-1 - - -
Surface tension (mN m-1) - - -

Degradation:
Property Click here for information on the parameters used to describe substance degradation Value Source/Quality Score/Other Information Click here for information on the primary data sources used to populate this database with degradation data Interpretation Click here for information on the way in which we interpret substance degradation data
General biodegradability -
Soil degradation (days) (aerobic) DT50 (typical) 2000 Q3 Very persistent
DT50 (lab at 20oC) 2000 Q3 Very persistent
DT50 (field) - - -
DT90 (lab at 20oC) - - -
DT90 (field) - - -
DT50 modelling endpoint - - -
Note Other sources: DT50 4-7 years
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 Stable Q3 -
Note -
Aqueous hydrolysis DT50 (days) at 20oC and pH 7 Value Stable Q3 -
Note -
Water-sediment DT50 (days) - - -
Water phase only DT50 (days) - - -

Soil adsorption and mobility:
Property Click here for information on the parameters used to describe substance adsorption and mobility Value Source/Quality Score/Other Information Click here for information on the primary data sources used to populate this database with adsorption and mobility data Interpretation Click here for information on the way in which we interpret substance adsorption and mobility
Linear Kd - Q2 Slightly mobile
Koc 1478
Notes and range Estimated
Freundlich Kf - - -
Kfoc -
1/n -
Notes and range -
pH sensitivity -


ECOTOXICOLOGY

for dicyclopentadiene

Property Click here for information on the parameters used to describe substance ecotoxicology Value Source/Quality Score/Other Information Click here for information on the primary data sources used to populate this database with ecotoxicology data Interpretation Click here for information on the way in which we interpret substance ecotoxicology
Bio-concentration factor BCF (l kg-1) 221 Q3 Whole fish Threshold for concern
CT50 (days) Not available -
Mammals - Acute oral LD50 (mg kg-1) 750 L3 Rat Moderate
Mammals - Short term dietary NOEL (mg kg-1) - - -
(ppm diet) - -
Birds - Acute LD50 (mg kg-1) 1010 V1 Unknown species Moderate
Birds - Short term dietary (LC50/LD50) - - -
Fish - Acute 96 hour LC50 (mg l-1) 15.9 F4 Oncorhynchus mykiss Moderate
Fish - Chronic 21 day NOEC (mg l-1) - - -
Aquatic invertebrates - Acute 48 hour EC50 (mg l-1) 10.5 F4 Daphnia magna Moderate
Aquatic invertebrates - Chronic 21 day NOEC (mg l-1) - - -
Aquatic crustaceans - Acute 96 hour LC50 (mg l-1) - - -
Sediment dwelling organisms - Acute 96 hour LC50 (mg l-1) - - -
Sediment dwelling organisms - Chronic 28 day NOEC, static, water (mg l-1) - - -
Sediment dwelling organisms - Chronic 28 day NOEC, sediment (mg kg-1) - - -
Aquatic plants - Acute 7 day EC50, biomass (mg l-1) - - -
Non-target plants - - -
- - -
Algae - Acute 72 hour EC50, growth (mg l-1) - - -
Algae - Chronic 96 hour NOEC, growth (mg l-1) - - -
Honeybees Contact acute 48 hour LD50 (μg bee-1) - - -
Oral acute 48 hour LD50 (μg bee-1) - - -
Unknown mode acute 48 hour LD50 (μg bee-1) Non-toxic L3 Low
Earthworms - Acute 14 day LC50 (mg kg-1) - - -
Earthworms - Chronic 14 day NOEC, reproduction (mg kg-1) - - -
Other soil macro-organisms - e.g. Collembola LR50 / EC50 / NOEC / % Effect - - -
Other arthropod (1) LR50 g ha-1 - - -
% Effect - - -
Other arthropod (2) LR50 g ha-1 - - -
% Effect - - -
Soil micro-organisms - - -
Mesocosm study data NOEAEC mg l-1 - - -
NOEAEC mg l-1 - -


HUMAN HEALTH AND PROTECTION

for dicyclopentadiene

General:
Property Click here for information on the parameters used to describe human health and protection issues Value Source/Quality Score/Other Information Click here for information on the primary data sources used to populate this database with human health and protection data Interpretation Click here for information on the way in which we interpret human health and protection data
Threshold of Toxicological Concern (Cramer Class) Click here for a note on the limitations of the Cramer class High (class III) - -
Mammals - Acute oral LD50 (mg kg-1) 750 L3 Rat Moderate
Mammals - Dermal LD50 (mg kg-1 body weight) > 5080 Q3 Rat -
Mammals - Inhalation LC50 (mg l-1) 1.0 Q3 Rat, 4 hr -
Other Mammal toxicity endpoints - -
ADI - Acceptable Daily Intake (mg kg-1bw day-1) - - -
ARfD - Acute Reference Dose (mg kg-1bw day-1) - - -
AAOEL - Acute Acceptable Operator Exposure Level (mg kg-1 bw day-1) - - -
AOEL - Acceptable Operator Exposure Level - Systemic (mg kg-1bw day-1) - - -
Dermal penetration studies (%) - - -
Dangerous Substances Directive 76/464 - - -
Exposure Limits [UK LT TWA 8 hr: 5 ppm (27 mg/m3)] UK EA QS database, 2018 -
Exposure Routes Public Low risk to Europeans as no longer approved for use
Occupational Workers may become exposed via inhalation, skin absorption and ingestion
European MRLs Click here for the EU MRL pesticide database
Drinking Water Standards - - -
Drinking Water MAC (μg l-1) - - -

Health issues:
Carcinogen Mutagen Endocrine disrupter Reproduction / development effects Cholinesterase inhibitor Neurotoxicant

-

-

-

-

-

Respiratory tract irritant Skin irritant Skin sensitiser Eye irritant Phototoxicant

-

-

General human health issues Moderately toxic
Ingestion may damage nervous system and/or liver and kidney damage
May cause chemical burns in contact with tissue,

: Yes, known to cause a problem
: No, known not to cause a problem
: Possibly, status not identified
- : No data found

Handling issues:
Property Click here for information on the parameters used to describe substance handling issues Value Source/Quality Score/Other Information Click here for information on the primary data sources used to populate this database with data on handling issues Interpretation Click here for information on the way in which we interpret data on handling issues
General Click here for a description of the International Maritime Dangerous Goods (IMDG) codes Mixtures of the vapour with air are explosive
May react with oxygen
Flammable
CLP classification 2013 None allocated at this time
EC Risk Classification Click here to view information omn the EU risk phrases Xn - Harmful: R20/22
Xi - Irritant: R36/37/38
H - Handling risks: F11
N - Dangerous for the environment: R51, R53
EC Safety Classification Click here to view information omn the EU safety phrases S2, S36/37, S61
WHO Classification NL - Not listed
US EPA Classification (formulation) No consensus across products or no products available - -
UN Number -
Waste disposal & packaging Click here for a description of UN packaging marks -


TRANSLATIONS

for dicyclopentadiene

Language Name
English dicyclopentadiene
French dicyclopentadiêne
German Dicyclopentadien
Danish dicyclopentadien
Italian diciclopentadiene
Spanish diciclopentadiene
Greek -
Slovenian diciklopentadien
Polish dicyklopentadien
Swedish -
Hungarian -
Dutch -

Record last updated: Tuesday 22 May 2018
Contact: aeru@herts.ac.uk
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