Registration Dossier
Registration Dossier
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: 476-160-4 | CAS number: 54807-34-0
- 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
Appearance/physical state/colour:
The substance is an organic white powder at 20 ºC and 1013 hPa with no odour.
Melting point:
The melting temperature of the test material has been determined to be 266°C. NaDMH decomposed on melting according to EC Method A.1.
Boiling point:
As the test material has been determined to decompose on melting, no value for boiling temperature could be determined. The calculated value of boiling temperature is greater than 360°C (633 K).
Relative density:
The relative density of the test material has been determined to be 1.40 at 22.5 °C according to EC Method A.3.
Particle size distribution:
The substance will only be imported and used as a component of a liquid preparation. Therefore a particle size distribution study was not performed.
Vapour pressure:
The vapour pressure of NaDMH has been determined to be less than 1.4 x 10-4 Pa at 25°C according to EC Method A.4.
Partition coefficient:
A study according to EU Method A.8 was carried out. The partition coefficient of the test material has been determined to be 0.343 at 25°C, log Pow = -0.465.
Water solubility:
A standard EEC A6 Method was not applicable due to the extremely high water solubility of the substance (>10000 mg/L).
Surface tension:
Substances having a surface tension below 60 mN/m are regarded as being surface-acitve. The surface tension of a 1.13 g/L solution of NaDMH has been determined to be 60.9 mN/m at 24°C. The test material is considered not to be a surface-active material.
Flash point:
Flash point study is not applicable for solid substances therefore, a flammability study was performed.
Auto-ignition temperature:
The auto-ignition temperature of the test item was determined according to EU Method A.16. The test material has been determined not to have a relative self-ignition temperature below its melting temperature (>266°C).
Flammability:
NaDMH has been determined to be not highly flammable as it did not propagate combustion over the 200 mm of the preliminary screening test.
Explosiveness / Oxidising properties:
There are no chemical groups present that would imply explosive or oxidising properties therefore the result has been predicted negative.
Stability in organic solvents:
The stability in organic solvents is only required if stability of the substance is considered to be critical. The stability test in organic solvents is not considered to be critical for NaDMH as it is produced as aqueous solution and has been isolated only for testing/notification purposes.
Dissociation constant:
For the dissociation constant a result of 9.19 pKa was determined for the read-across substance 5,5-dimethylhydantoin (DMH) from e.m.f measurements on the cell H2/Acid-base solution/saturated KCl/HgCl/Hg.
Viscosity:
NaDMH is a solid therefore the viscosity study is not applicable.
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.
