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EC number: 201-222-2 | CAS number: 79-74-3
- 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
![](https://echa.europa.eu./o/diss-blank-theme/images/factsheets/A-REACH/factsheet/print_physical-and-chemical-properties.png)
Endpoint summary
Administrative data
Description of key information
Additional information
The results of the physico-chemical properties of 2,5-di-tert-pentylhydroquinone (CAS no: 79-74-3, EC no: 201-222-2) are given below.
Parameter |
Guideline(s) |
Result |
Comment |
Appearance/physical state |
No guideline followed
|
White to cream coloured powder or granular solid |
|
Melting/freezing point |
no guideline followed |
The melting temperature of Lowinox® AH25 was determined using DSC. The melting temperature of the test substance is 181.34 °C. |
Differential scanning calorimetry in air. |
Boiling point |
no guideline followed |
The boiling temperature of Lowinox® AH25 was determined using DSC. The boiling temperature of the test substance is 325.7 °C. |
Differential scanning calorimetry in air |
Density |
OECD Guideline 109 EU Method A.3 |
The density of the test substance at 20ºC was 1.045 g/cm3 (1.04 x 10E3 kg/m3). The relative density was 1.04. |
Gas comparison pycnometer |
Particle size distribution |
No guideline followed |
994.2% of Lowinox AH25 had a particle size of < 100 um, and 73.5% had a particle size < 40 um. |
Dry sieve test |
Vapour pressure |
OECD Guideline 104 EU Method A.4 |
The vapour pressure of the test substance at 20°C (293K) was 7.55 x 10-5 Pa = 5.67 x 10-7 mm Hg. |
Isothermal thermogravimetric effusion method |
Partition coefficient |
OECD Guideline 123 |
Kow = 1.4 x 10E+05, log Kow = 5.1 |
Slow Stir method |
Water solubility |
OECD Guideline 105 EU Method A.6 |
The water solubility of the test substance at 20°C was < 0.08 x 10-3 g/l. The pH of the aqueous samples was 7.5. |
Column elution method |
Surface tension |
OECD Guideline 115 EU Method A.5 |
|
Waived |
Flash point |
EU Method A.9 |
|
waived |
Auto flammability |
United Nations (UN), UN no.ST/SG/AC.10/11/Rev.4: Recommendations on the Transport of Dangerous Goods, Part III: Classification Procedures, Test Methods and Criteria Relating to Explosives of Class 3, Class 4, Division 5.1 and Class 9, Test N.1, 2003. |
Lowinox® AH25 is considered “not a self-heating substance” |
Test 1 of the Modified Bowes-Cameron Cage test |
Flammability |
EU Method A.10 United Nations (UN), UN no.ST/SG/AC.10/11/Rev.4: Recommendations on the Transport of Dangerous Goods, Part III: Classification Procedures, Test Methods and Criteria Relating to Explosives of Class 3, Class 4, Division 5.1 and Class 9, Test N.4, 2003. |
The preliminary screening test was performed for the determination of the flammability of Lowinox® AH25. Based on the results obtained, the test substance is considered ‘not highly flammable’. |
Preliminary screening test |
Flammability (Contact with water) |
EU Method A.12 UN no.ST/SG/AC.10/11/Rev.4: Part III, Test N5, 2003 UN no.ST/SG/AC.10/11/Rev.4: Appendix 6, Screening procedures, 2003 |
Based on the evaluation of structural features, Lowinox® AH25 is considered ‘not highly flammable’ in contact with water. |
statement |
Pyrophoric Properties of Solids and Liquids |
EU Method A.13 UN no.ST/SG/AC.10/11/Rev.4: Part III, Test N2, 2003 UN no.ST/SG/AC.10/11/Rev.4: Appendix 6, Screening procedures, 2003 |
Based on the evaluation of structural features, Lowinox®AH25 has no pyrophoric properties. |
statement |
Explosive properties |
EU Method A.14 |
Based on the evaluation of the chemical structure and oxygen balance value of the substance, it is deemed not to be potentially explosive. |
statement |
Oxidising properties |
EU Method A.17 |
Based on the evaluation of the chemical structure and oxygen balance value of the substance of interest, it is deemed not to be potentially oxidizing. |
statement |
Stability in organic solvents and identity of relevant degradation products |
|
|
waived |
Dissociation constant |
|
|
waived |
Viscosity |
|
|
waived |
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.
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