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: 209-957-0 | CAS number: 598-94-7
- 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

Auto flammability
Administrative data
Link to relevant study record(s)
- Endpoint:
- relative self-ignition temperature (solids)
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- September 2013
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.16 (Relative Self-Ignition Temperature for Solids)
- GLP compliance:
- not specified
- Specific details on test material used for the study:
- - Analytical purity: 99.9 %
- Lot/batch No.: 301601 - Key result
- Remarks on result:
- no self-ignition observed up to the melting point
- Conclusions:
- The sample temperature could not reach 400 °C prior to that of the oven, until the sample was heated to its melting point. Therefore the relative self-ignition temperature of 1,1 -Dimethylurea lies above its melting point.
- Executive summary:
The relative self-ignition temperature of 1,1 -Dimethylurea was determined in a test sccording to EC Regulation No.440/2008 Annex A.16. A certain volume of the sample was placed in an oven and was heated at a constant but low rate. The temperature of the oven and in the centre of the sample were continuously recorded at the same time. For the purpose of this test, the tamperature of the oven at which the sample temperature reached 400 °C prior to the oven by self-heating was called the relative self-ignition temperature.
The sample temoperature could not reach 400 °C prior to that of the oven, until the sample was heated to its melting point. Therefore the relative self-ignition temperature of 1,1 -Dimethylurea lies above its melting point.
- Endpoint:
- self-ignition of dust accumulation
- Remarks:
- deposited dust
- Type of information:
- experimental study
- Adequacy of study:
- supporting study
- Study period:
- February 2004
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- test procedure in accordance with national standard methods with acceptable restrictions
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- DIN EN 15188 (Determination of the spontaneous ignition behaviour of dust accumulations)
- Principles of method if other than guideline:
- This test determines the ignition temperature of a dry product on a hot surface. For a description of the method see "any other information on materials and methods".
- GLP compliance:
- not specified
- Key result
- Self-ignition temperature:
- > 360 °C
- Conclusions:
- No auto-ignition of deposited 1,1-Dimethylurea dust occured on surfaces until 360 °C.
- Executive summary:
The test determines the ignition temperature of a deposited dusty test substance on hot surfaces. The test is conducted according to the test protocol. The surface area of the substance is increased intentionally in this test by preparing the test substance accordingly to simulate the deposited dusty properties. The ignition temperature of deposited dusty test material is expected to be lower than the ignition temperature of the solid with larger particle diameters. At the hottest temperature in this test (360°C) no auto-ignition of deposited 1,1-Dimethylurea dust occured.
- Endpoint:
- self-ignition of dust accumulation
- Remarks:
- dispersed dust
- Type of information:
- experimental study
- Adequacy of study:
- supporting study
- Study period:
- February - March 2004
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- test procedure in accordance with national standard methods with acceptable restrictions
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- DIN EN 15188 (Determination of the spontaneous ignition behaviour of dust accumulations)
- Principles of method if other than guideline:
- Dispersed dust: This test determines the ignition temperature of flammable dispersed dusty substances on hot surfaces. See section "any other information on materials and methods" for detailed description of the method.
- GLP compliance:
- not specified
- Key result
- Self-ignition temperature:
- 425 °C
- Conclusions:
- The autoflammabilty temperature of dispersed dust of 1,1-Dimethylurea was tested to be 425 °C.
- Executive summary:
The test determines the ignition temperature of a dispersed dusty test substance on hot surfaces. The test is conducted according to a test protocol. The surface area of the substance is increased intentionally in this test by preparing the test substance accordingly to simulate the dispersed dusty properties. The ignition temperature of dispersed dusty test material is expected to be significantly lower than the ignition temperature of the solid with larger particle diameters. The autoflammabilty temperature of dispersed dust of 1,1 -Dimethylurea was tested to be 425 °C.
Referenceopen allclose all
The test phenomena and results of the test are shown in the following table:
No. |
1 |
2 |
Sample volume |
8cm3 |
8cm3 |
Heating rate |
0.5oC/min |
0.5oC/min |
Oven Temperature when Sample Temperature reached its melting point/range |
About 2oC higher thanSample Temperature |
About 2oC higher thanSample Temperature |
Test phenomena |
1) The sample temperature could not reach 400oCuntil the sample was heated to its melting point. 2) There was no substance in the vessel after the test completed. |
1) The sample temperature could not reach 400oCuntil the sample was heated to its melting point. 2) There was no substance in the vessel after the test completed. |
1) It could be considered as an endothermic effect from the sample melting that the oven temperature was about 2 °C higher than the sample temperature when the sample was heated to its melting point.
2) There was no substance in the vessel after the test was completed. This could prove that the sample in the vessel had melted and flowed away from the cribriform vessel.
3) The sample temperature could not reach 400 °C prior to that of the oven until the sample was heated to its melting point. It could be confirmed that the relative self-ignition temperature was above the melting point.
At the highest temperature (360 °C) no ignition, but the test substance 1,1-Dimethylurea starts to smoke when put onto the hot surface.
Weighted sample |
Temperature |
Reaction |
100 mg |
455 °C |
ignition |
100 mg |
450 °C |
ignition |
100 mg |
442 °C |
ignition |
100 mg |
435 °C |
no ignition |
100 mg |
430 °C |
no ignition |
300 mg |
448 °C |
ignition |
300 mg |
445 °C |
ignition |
300 mg |
437 °C |
no ignition |
300 mg |
432 °C |
no ignition |
300 mg |
426 °C |
no ignition |
500 mg |
423 °C |
no ignition |
500 mg |
426 °C |
ignition |
500 mg |
420 °C |
no ignition |
500 mg |
414 °C |
no ignition |
500 mg |
408 °C |
no ignition |
Description of key information
No auto-ignition of deposited dust of 1,1 -Dimethylurea occurred on hot surfaces until 360°C.
The autoflammability temperature of dispersed dust of 1,1 -Dimethylurea was tested to be 425 °C.
Furthermore the relative self-ignition temperature of 1,1 -Dimethylurea was determined in a test according to EC Regulation No.440/2008 Annex A.16. The test indicates that the relative self-ignition temperature of 1,1 -Dimethylurea lies above its melting point.
Key value for chemical safety assessment
- Autoflammability / Self-ignition temperature at 101 325 Pa:
- 425 °C
Additional information
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.

EU Privacy Disclaimer
This website uses cookies to ensure you get the best experience on our websites.