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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 203-509-8 | CAS number: 107-66-4
- 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 water: screening tests
Administrative data
Link to relevant study record(s)
- Endpoint:
- biodegradation in water: ready biodegradability
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 04/1988
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- guideline study with acceptable restrictions
- Qualifier:
- according to guideline
- Guideline:
- EU Method C.4-E (Determination of the "Ready" Biodegradability - Closed Bottle Test)
- Version / remarks:
- Cited as RG Directive 79/831/ Annex V
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- OECD Guideline 301 D (Ready Biodegradability: Closed Bottle Test)
- GLP compliance:
- no
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, domestic, non-adapted
- Details on inoculum:
- Test organisms
Type : mixed population of aquatic microorganisms (activated sludge)
Origin : aeration tank of a wastewater plant treating predominantly domestic sewage (Wupper area water)
Date of collection : 1988-02-26 - Duration of test (contact time):
- 28 d
- Initial conc.:
- 4.4 other: mL/L
- Based on:
- test mat.
- Parameter followed for biodegradation estimation:
- O2 consumption
- Reference substance:
- aniline
- Parameter:
- % degradation (O2 consumption)
- Value:
- 3
- Sampling time:
- 5 d
- Parameter:
- % degradation (O2 consumption)
- Value:
- 0
- Sampling time:
- 15 d
- Key result
- Parameter:
- % degradation (O2 consumption)
- Value:
- 12
- Sampling time:
- 28 d
- Results with reference substance:
- 91 % degradation after 28 days
- Validity criteria fulfilled:
- yes
- Remarks:
- positive control (with reference substance) the biodegradation was 91 %
- Interpretation of results:
- under test conditions no biodegradation observed
- Conclusions:
- Dibutyl hydrogen phosphate is not readily biodegradable. After 28 days 12 % of dibutyl hydrogen phosphate have been degraded in a Closed Bottle Test.
- Executive summary:
A test on ready biodegradability was conducted according to EU method C. 4 -E (Determination of the "Ready" Biodegradability - Closed Bottle Test). After 28 days 12 % degradation of dibutyl hydrogen phosphate was determined and for the positive control (with reference substance aniline) the biodegrdation was 91 %. In conclusion dibutyl hydrogen phosphate is not readily biodegradable.
- Endpoint:
- biodegradation in water: inherent biodegradability
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 05-06/1991
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- guideline study with acceptable restrictions
- Qualifier:
- according to guideline
- Guideline:
- EU Method C.9 (Biodegradation: Zahn-Wellens Test)
- Deviations:
- no
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- OECD Guideline 302 B (Inherent biodegradability: Zahn-Wellens/EMPA Test)
- Principles of method if other than guideline:
- Cited as Directive 87/302/EEC and DIN 38 412 part 25
- GLP compliance:
- yes
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, industrial, adapted
- Details on inoculum:
- - Activated sludge of aeration tanks of a sewage treatment plant treating predominantly sewage of industrial origin (STP Leverkusen Bürrig)
- Date of collections : 1991-05-22
- Concentration of inoculum (dry weight) : 1000 mg/L - Duration of test (contact time):
- 28 d
- Initial conc.:
- 100 mg/L
- Based on:
- DOC
- Details on study design:
- The substance is dissolved in a mineral medium, inoculated with a mixed population of aquatic microorganisms and 28 days under aerobic conditions were incubated in the dark at 20 – 25°C. The biodegradation of the substance is determined during this time by the decrease of the DOC.
- Parameter:
- % degradation (DOC removal)
- Value:
- 9
- Sampling time:
- 7 d
- Parameter:
- % degradation (DOC removal)
- Value:
- 97
- Sampling time:
- 14 d
- Parameter:
- % degradation (DOC removal)
- Value:
- > 98
- Sampling time:
- 21 d
- Key result
- Parameter:
- % degradation (DOC removal)
- Value:
- > 98
- Sampling time:
- 28 d
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- inherently biodegradable
- Conclusions:
- Within 28 days a degradation of > 98 % was determined according to the EU Method C.9 (Biodegradation: Zahn-Wellens Test). Therefore dibutyl hydrogen phosphate is considered to be "Inherently Biodegradable".
- Executive summary:
Dibutyl hydrogen phosphate is dissolved in a mineral medium, inoculated with a mixed population of aquatic microorganisms and 28 days under aerobic conditions were incubated in the dark at 20–25°C. The biodegradation of dibutyl hydrogen phosphate is determined using the removal of the DOC. Within 28 days a degradation of > 98 % was determined according to the EU Method C.9 (Biodegradation: Zahn-Wellens Test). Therefore dibutyl hydrogen phosphate is considered to be "Inherently Biodegradable".
Referenceopen allclose all
Description of key information
Dibutyl hydrogen phosphate is not readily biodegradable. After 28 days 12 % of dibutyl hydrogen phosphate had been degraded in a Closed Bottle Test. Within 28 days a degradation of > 98 % was determined in a Zahn-Wellens Test. Therefore, dibutyl hydrogen phosphate is considered to be inherently biodegradable.
Key value for chemical safety assessment
- Biodegradation in water:
- inherently biodegradable
- Type of water:
- freshwater
Additional information
A test on ready biodegradability was conducted according to EU method C.4-E (Determination of the "Ready" Biodegradability - Closed Bottle Test). After 28 days 12 % degradation of dibutyl hydrogen phosphate was determined and for the positive control (with reference substance) the biodegradation was 91 %. In conclusion dibutyl hydrogen phosphate is not readily biodegradable.
To determine the inherent biodegradation, dibutyl hydrogen phosphate was inoculated with a mixed population of aquatic microorganisms for 28 days under aerobic conditions, and incubated in the dark at 20–25°C. The biodegradation of dibutyl hydrogen phosphate is determined via the removal of the DOC. Within 28 days a degradation of > 98 % was obtained according to the EU Method C.9 (Biodegradation: Zahn-Wellens Test). Therefore dibutyl hydrogen phosphate is considered to be inherently biodegradable.
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.