Registration Dossier
Registration Dossier
Data platform availability banner - registered substances factsheets
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
Diss Factsheets
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 278-636-5 | CAS number: 77182-82-2
- 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
Endpoint summary
Administrative data
Description of key information
Additional information
Hydrolysis :
The hydrolytic behaviour of glufosinate-ammonium as function of the pH value (5, 7, 9) at 25 °C was investigated over 30 days according to the EPA-guideline, subdivision N, §161-1 (Görlitz & Klöckner, 1986; M-110354-03-1). Glufosinate-ammonium was stable to hydrolytic conversion under sterile abiotic conditions at 25 °C and pH 5, 7 and 9. No DT50 was therefore determined. No transformation products were formed.
It is concluded that abiotic hydrolysis of glufosinate-ammonium does not contribute to the elimination from the natural aquatic environment.
Photolysis :
The aqueous photolysis of glufosinate-ammonium was studied to determine the route of degradation, the nature of photolytic products and the rate of photolysis (Sarafin et al., 1989; M-123935-01). Sterile aqueous solutions (approx.1.5mg/L) in acetate (pH 5), phosphate (pH 7) and borate (pH 9) buffer were irradiated in a laboratory experiment. The irradiation was performed under temperature control at 25 ± 2 °C (dark controls at 21 ± 2 °C). The samples were irradiated for up to 192 hours. The duration as mean value corresponded to 35 days under outdoor conditions (12 hours sunlight per day). No other compounds except the test item were found in the buffer solutions after termination of irradiation. There was practically no formation of14CO2or other volatile degradates.
It can be stated that glufosinate-ammonium is photolytically stable in sterile aqueous solutions.
Results were similar for conditions of indirect photolytic transformation (Stumpf, K. & Schink, C., 1992; M-137377-01-1) in sterile natural water (pH 5.7) at 25 °C under light conditions of Europe, i.e. 52° north. Values of the DT50 of 1.3 to 2.2 years were calculated with no major transformation products formed.
Direct or indirect photolytic transformation in water therefore does not significantly contribute to the elimination of glufosinate-ammonium residues from the aquatic environment.
No quantum yield was determined due to a lack of absorption of light by glufosinate-ammonium in the relevant wavelength range of visible light.
The photodegradation of 3,4-14C-labelled glufosinate-ammonium was studied on the surface of a sandy loam soil (Stumpf et al., 1989; M-123938-01-1). Glufosinate-ammonium was recovered quantitatively following irradiation on sterile soil surfaces. Glufosinate-ammonium was therefore stable towards photolytically induced transformation processes. No transformation products were formed being specific for photolytic degradation.
Conclusively, photolytical transformation processes on soil surfaces do not play a role for the elimination of glufosinate-ammonium residues from the soil environment.
Overall conclusion:
Abiotic degradation is not relevant process for glufosinate-ammonium as neither hydrolytic and photolytic degradation in water nor photolytic degradation in soil do present the major degradation route in the environment. The degradation is mainly mediated by microbial processes.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.