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EC number: 202-425-9 | CAS number: 95-50-1
- Life Cycle description
- Uses advised against
- Endpoint summary
- Appearance / physical state / colour
- Melting point / freezing point
- Boiling point
- Density
- Particle size distribution (Granulometry)
- Vapour pressure
- Partition coefficient
- Water solubility
- Solubility in organic solvents / fat solubility
- Surface tension
- Flash point
- Auto flammability
- Flammability
- Explosiveness
- Oxidising properties
- Oxidation reduction potential
- Stability in organic solvents and identity of relevant degradation products
- Storage stability and reactivity towards container material
- Stability: thermal, sunlight, metals
- pH
- Dissociation constant
- Viscosity
- Additional physico-chemical information
- Additional physico-chemical properties of nanomaterials
- Nanomaterial agglomeration / aggregation
- Nanomaterial crystalline phase
- Nanomaterial crystallite and grain size
- Nanomaterial aspect ratio / shape
- Nanomaterial specific surface area
- Nanomaterial Zeta potential
- Nanomaterial surface chemistry
- Nanomaterial dustiness
- Nanomaterial porosity
- Nanomaterial pour density
- Nanomaterial photocatalytic activity
- Nanomaterial radical formation potential
- Nanomaterial catalytic activity
- Endpoint summary
- Stability
- Biodegradation
- Bioaccumulation
- Transport and distribution
- Environmental data
- Additional information on environmental fate and behaviour
- Ecotoxicological Summary
- Aquatic toxicity
- Endpoint summary
- Short-term toxicity to fish
- Long-term toxicity to fish
- Short-term toxicity to aquatic invertebrates
- Long-term toxicity to aquatic invertebrates
- Toxicity to aquatic algae and cyanobacteria
- Toxicity to aquatic plants other than algae
- Toxicity to microorganisms
- Endocrine disrupter testing in aquatic vertebrates – in vivo
- Toxicity to other aquatic organisms
- Sediment toxicity
- Terrestrial toxicity
- Biological effects monitoring
- Biotransformation and kinetics
- Additional ecotoxological information
- Toxicological Summary
- Toxicokinetics, metabolism and distribution
- Acute Toxicity
- Irritation / corrosion
- Sensitisation
- Repeated dose toxicity
- Genetic toxicity
- Carcinogenicity
- Toxicity to reproduction
- Specific investigations
- Exposure related observations in humans
- Toxic effects on livestock and pets
- Additional toxicological data

Toxicity to terrestrial plants
Administrative data
- Endpoint:
- toxicity to terrestrial plants, other
- Remarks:
- Several studies on the toxicity of 1,2 -dichlorobenze to terrestrial plants were summarized in the assessment of the BUA report 53 (1990).
- Type of information:
- other: BUA report
- Adequacy of study:
- other information
- Reliability:
- other: BUA report
- Rationale for reliability incl. deficiencies:
- other: BUA report
Data source
Referenceopen allclose all
- Reference Type:
- other: BUA report
- Title:
- Unnamed
- Year:
- 1 990
- Reference Type:
- publication
- Title:
- Effect of organophosphorus insecticides on Hill reaction
- Author:
- Yukimoto M
- Year:
- 1 983
- Bibliographic source:
- J Pesticide Sci, 8: 63-68
- Reference Type:
- publication
- Title:
- The fever fly, Dilophus febrilis L., and methods for control of its larvae in cultivated lawns
- Author:
- Edwards EE
- Year:
- 1 941
- Bibliographic source:
- Ann Appl Biol, 28: 34-38
- Reference Type:
- publication
- Title:
- The effect of a chemical soil sterilizing agent on the subsequent development of tomato plants
- Author:
- Western JH, Stewart R
- Year:
- 1 943
- Bibliographic source:
- Ann Appl Biol, 30: 370-372
- Reference Type:
- publication
- Title:
- Phytotoxizität und Fungizidität chlorsubstituierter Derivate des Benzols in Bezug zu deren Konstitution
- Author:
- St'ota Z, Toman M
- Year:
- 1 957
- Bibliographic source:
- Biológia, 12: 683-692
- Reference Type:
- publication
- Title:
- Effects of DCB, DCB-xylene mixtures, amitrol, and sodium salt of dalapon in irrigation water on corn and rutabagas
- Author:
- Bruns VF, Dawson JH
- Year:
- 1 959
- Bibliographic source:
- Weeds, 7: 333-340
- Reference Type:
- publication
- Title:
- Report by entomologist in charge at Meringa (1929-30)
- Author:
- Jarvis E
- Year:
- 1 931
- Bibliographic source:
- 30th Ann Rep Bur Sugar Expt Stas Queensland, Brisbane, 1930. Rev Appl Entomol, A19: 256
- Reference Type:
- publication
- Title:
- Investigation on injury to plants from air polllution in the Los Angeles area
- Author:
- Haagen-Smit AJ, Darley EF, Zaitlin M, Hull H, Noble W
- Year:
- 1 952
- Bibliographic source:
- Plant Physiol, 27: 18-34
Materials and methods
- Principles of method if other than guideline:
- BUA report
- GLP compliance:
- not specified
Test material
- Reference substance name:
- 1,2-dichlorobenzene
- EC Number:
- 202-425-9
- EC Name:
- 1,2-dichlorobenzene
- Cas Number:
- 95-50-1
- Molecular formula:
- C6H4Cl2
- IUPAC Name:
- 1,2-dichlorobenzene
Constituent 1
Results and discussion
Any other information on results incl. tables
BUA report:
Several studies on the toxicity of 1,2 -dichlorobenze to terrestrial plants were summarized in the assessment of the BUA report 53 (1990). Due to their age, the cited studies were not reliable studies as they were not conducted according to current guidelines.
The phytotoxic action of chlorinated benzenes on spinach leaves was studied via inhibition of the Hill reaction. The extent of inhibition increases along the series monochlorobenzene to dichlorobenzenes to trichlorobenzenes in line with increase in hydrophobic character and decrease in solubility in water. Inhibition concentrations (IC) were found to be 10.3 mg/L (IC7), 58.8 mg/L (IC46) and 102.9 mg/L (IC85). 1,2 -Dichlorobenzene apparently has a certain affinity for chloroplasts rich in lipids with the result that the primary reactions of photosynthesis are inhibited.
A phytotoxic effect on herbage was not observed when lawn is treated with a 1 -% emulsion at a rate of 54.4 g 1,2 -dichlorobenzene/m2.
However, a phytotoxic effect was noted in the tomato plant. Although germination of tomato seed in soil compost treated with a 0.5 -%emulsion of 1,2 -dichlorobenzene was not impaired, development of the young plant was affected. The part of the plant above the 5th and 6th leaves was stunted and consequently there was a sgnificant reduction in yield of 35%.
The phytotoxic action on wheat seedlings in a greenhouse was also tested. Treatment of the seedlings with 5620 mg/kg or more of 1,2 -dichlorobenzene caused significant (> 40%) inhibition of growth.
Furthermore, phytotoxic effects on Indian corn (Zea mays L.) and the plant of the rutabagas (Brassica napobrassica) were studied. Two days watering of the corn plant at the 5 -7 leaf stage with irrigation water containing 740 mg/L of emulsified 1,2 -dichlorobenzene (equivalent to 56.4 g/m2 soil) resulted one week later in pronounced growth inhibition and ultimately reduced the harvest to 25%. Impaired growth was also observed in the similarly treated rutabagas at the 6 -7 leaf stage. At harvest time, the number of rutabagas of diameter in excess of 5 cm was reduced by 87%.
Treatment of the sugar-cane stool in a radius of 7 -8 cm with 9.1 g of 1,2 -dichlorobenzene in order to control harmful grubs caused the plant to wilt and ultimately to die.
A period of 5 hours exposure of 10 -day-old oat seedlings and 30 -day-old lucerne, endives, sugarbeet and spinach plants to 152 mg/m3 of 1,2 -dichlorobenzene in gaseous form did not result in any damage to the leaves of the plants.
Applicant's summary and conclusion
- Executive summary:
Several studies on the toxicity of 1,2 -dichlorobenze to terrestrial plants were summarized in the assessment of the BUA report 53 (1990). Due to their age, the cited studies were not reliable studies as they were not conducted according to current guidelines.
The phytotoxic action of chlorinated benzenes on spinach leaves was studied via inhibition of the Hill reaction. The extent of inhibition increases along the series monochlorobenzene to dichlorobenzenes to trichlorobenzenes in line with increase in hydrophobic character and decrease in solubility in water. Inhibition concentrations (IC) were found to be 10.3 mg/L (IC7), 58.8 mg/L (IC46) and 102.9 mg/L (IC85). 1,2 -Dichlorobenzene apparently has a certain affinity for chloroplasts rich in lipids with the result that the primary reactions of photosynthesis are inhibited.
A phytotoxic effect on herbage was not observed when lawn is treated with a 1 -% emulsion at a rate of 54.4 g 1,2 -dichlorobenzene/m2.
However, a phytotoxic effect was noted in the tomato plant. Although germination of tomato seed in soil compost treated with a 0.5 -%emulsion of 1,2 -dichlorobenzene was not impaired, development of the young plant was affected. The part of the plant above the 5th and 6th leaves was stunted and consequently there was a sgnificant reduction in yield of 35%.
The phytotoxic action on wheat seedlings in a greenhouse was also tested. Treatment of the seedlings with 5620 mg/kg or more of 1,2 -dichlorobenzene caused significant (> 40%) inhibition of growth.
Furthermore, phytotoxic effects on Indian corn (Zea maysL.) and the plant of the rutabagas (Brassica napobrassica) were studied. Two days watering of the corn plant at the 5 -7 leaf stage with irrigation water containing 740 mg/L of emulsified 1,2 -dichlorobenzene (equivalent to 56.4 g/m2 soil) resulted one week later in pronounced growth inhibition and ultimately reduced the harvest to 25%. Impaired growth was also observed in the similarly treated rutabagas at the 6 -7 leaf stage. At harvest time, the number of rutabagas of diameter in excess of 5 cm was reduced by 87%.
Treatment of the sugar-cane stool in a radius of 7 -8 cm with 9.1 g of 1,2 -dichlorobenzene in order to control harmful grubs caused the plant to wilt and ultimately to die.
A period of 5 hours exposure of 10 -day-old oat seedlings and 30 -day-old lucerne, endives, sugarbeet and spinach plants to 152 mg/m3 of 1,2 -dichlorobenzene in gaseous form did not result in any damage to the leaves of the plants.
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