Registration Dossier
Registration Dossier
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EC number: 270-219-6 | CAS number: 68413-47-8
Endpoint summary
Administrative data
Description of key information
Additional information
Appearance/physical state/colour:
Butanedioic acid, 2-[(dipropoxyphosphinothioyl)thio]-, 1,4-dibutyl ester is a light yellow liquid at 20°C and 1013 hPa.
Freezing point:
Key study:
In an OECD Guideline 102 study, conducted according to GLP, the freezing point of Butanedioic acid, 2-[(dipropoxyphosphinothioyl)thio]-, 1,4-dibutyl ester is less than 253K+- 0.5K at 101,325 Pa. (SafePharm, 2004).
Boiling point:
Key study:
In an OECD Guideline 103 study, conducted according to GLP, the boiling point of Butanedioic acid, 2-[(dipropoxyphosphinothioyl)thio]-, 1,4-dibutyl ester could not be determined. Butanedioic acid, 2-[(dipropoxyphosphinothioyl)thio]-, 1,4-dibutyl ester has been determined to decompose from aproximately 538K +- 0.5K at 102.36 kPa. A calculated value of boiling point gave a result of 540K at 101.325 kPa (SafePharm, 2004).
Density and relative density:
Key study:
In an OECD Guideline 109 study, conducted according to GLP, the density of Butanedioic acid, 2-[(dipropoxyphosphinothioyl)thio]-, 1,4-dibutyl ester is 1.07 x 103kg/m3and the relative density of Butanedioic acid, 2-[(dipropoxyphosphinothioyl)thio]-, 1,4-dibutyl ester is 1.07 at 20.0 +- 0.5℃ (SafePharm, 2004).
Water solubility:
Key study:
In an OECD Guideline 105 study, conducted according to GLP, the water solubility of Butanedioic acid, 2-[(dipropoxyphosphinothioyl)thio]-, 1,4-dibutyl ester is 2.86 x 10-2g/l at 20.0 +- 0.5℃ (SafePharm, 2004).
Partition coefficient:
Key study:
In an OECD Guideline 117 study, conducted according to GLP, the partition coefficient (log Pow) of Butanedioic acid, 2-[(dipropoxyphosphinothioyl)thio]-, 1,4-dibutyl ester at 40°C is 4.61 (SafePharm, 2004).
Dissociation constant:
Based on the substance structure, Butanedioic acid, 2-[(dipropoxyphosphinothioyl)thio]-, 1,4-dibutyl ester contains no dissociation constants within the environmentally relevant pH range (SafePharm, 2004). The dissociation constant in water, therefore, was not determined according to OECD 112 and this endpoint is being waived.
Vapour pressure:
Key study:
In an OECD 104 study, conducted according to GLP, the vapour pressure of Butanedioic acid, 2-[(dipropoxyphosphinothioyl)thio]-, 1,4-dibutyl ester at 25℃ is 1.7 x 10E-1 Pa (SafePharm, 2004).
Flash point
The flash point of Butanedioic acid, 2-[(dipropoxyphosphinothioyl)thio]-, 1,4-dibutyl ester is 109 °C. The barometric pressure at the time of testing was 768.438 mmHg (Smithers Viscient, 2018).
Auto flammability
The auto flammability of the test material was 263°C at a barometric pressure of 766.063 mmHg, with an ignition delay time of 68 seconds (Smithers Viscient, 2018).
Explosiveness
Butanedioic acid, 2-[(dipropoxyphosphinothioyl)thio]-, 1,4-dibutyl ester is not explosive. No explosophores were identified in the molecular structure of the test substance. The oxygen balance was determined to be -172 for component 1 (main constituent). The exothermal decomposition energy was determined to be 45.0 J/g with an onset point at 249 °C and 28.7 J/g with a theoretical onset point at 309 °C (Smithers Viscient, 2018).
Oxidising properties
The sample of Butanedioic acid, 2-[(dipropoxyphosphinothioyl)thio]-, 1,4-dibutyl ester was found to have a mean pressure rise time greater than that observed for the nitric acid reference sample. The test substance is therefore not considered to be an oxidising liquid (Dekra, 2018).
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