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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 206-114-9 | CAS number: 302-01-2
- 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
Biodegradation in soil
Administrative data
Link to relevant study record(s)
- Endpoint:
- biodegradation in soil: simulation testing
- Data waiving:
- study technically not feasible
- Justification for data waiving:
- other:
- Endpoint:
- biodegradation in soil
- Type of information:
- experimental study
- Adequacy of study:
- supporting study
- Reliability:
- 4 (not assignable)
- Rationale for reliability incl. deficiencies:
- secondary literature
- Remarks:
- The assessment contains a summary of relevant studies concerning biotic or abiotic degradation in soil and water.
- Principles of method if other than guideline:
- Effect of hydrazine on microbial activity not known. Therefore, degradation rates and effects on microorganisms determined.
- GLP compliance:
- not specified
- Test type:
- laboratory
- Oxygen conditions:
- aerobic
- Soil classification:
- not specified
- Soil no.:
- #1
- Soil type:
- other: Non-sterile Arredondo fine sand. Clay content assumed to be very low, it is fine sand primarily.
- % Org. C:
- 1.7
- Details on soil characteristics:
- Inoculum concentration or number of microorganisms: 1 Cfu/g soil
- Duration:
- 8 d
- Details on transformation products:
- No evidence of ammonia produced via degradation.
- Conclusions:
- Hydrazine concentrations were monitored in sterile and non-sterile Arredondo fine sand. Autooxidation appeared to be the principal factor contributing to the disappearance of the chemical from the soil, as less than 3% of applied hydrazine at a concentration of 10 μg/g soil was recovered from sterile soil. By comparing the hydrazine loss from sterile and non-sterile soils, it appeared that biological degradation was responsible for about 20% of
the degradation. - Executive summary:
Half-life in soil were reported to be in the range of <4E-02 days (10 µg/g)
0.5 days (100 µg/g)
3 days (500 µg/g) at 25°C.
It is assumed that at higher concentrations bacteria were killed based on the toxic effects of hydrazine to bacteria.
Referenceopen allclose all
Description of key information
Standard OECD test guidelines are not applicable to inorganic chemicals such as Hydrazine.
Key value for chemical safety assessment
Additional information
One older study (Ou et al 1987) was discussed by Environmental Canada 2011.
Hydrazine concentrations were monitored in sterile and non-sterile Arredondo fine sand. Autooxidation appeared to be the principal factor contributing to the disappearance of the chemical from the soil, as less than 3% of applied hydrazine at a concentration of 10 μg/g soil was recovered from sterile soil. By comparing the hydrazine loss from sterile and non-sterile soils, it appeared that biological degradation was responsible for about 20% of the degradation.
Half-life times of <4E-02 days (10 µg/g), 0.5 days (100 µg/g) and 3 days (500 µg/g) were reported. It is however assumed that at higher concentrations bacteria were killed based on the toxic effects of hydrazine to bacteria. The result based on 100 µg/g is, although a very high loading, is considered as worst case yielding a half-life of 0.5 days.
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.