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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

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 |
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