Phosphoric acid, bis(1,1-dimethylethyl) ester

Endpoint summary

Additional information

The substance considered in the present dossier is manufactured as a 15% solution of dtBHP in n-heptane.

Only melting point was tested on the parent multi-constituent substance. Other physico-chemical properties presented below are derived from data on the constituents.

Boiling, volatility, flammability and viscosity are expected to be driven by the solvent.

Hence the solution is similarly classified liquid as a flammable liquid, with aspiration hazard (see also Section 7).

No other physico-chemical hazards are anticipated, based on CLP criteria. However, incompatible substances may lead to release of dangerous decomposition products.

Summary of relevant physico-chemical properties:

Endpoint	Data
Appearance	Clear colourless liquid.
Freezing point	< -20°C
Boiling point	Initial b.p. expected >= 90°C (extrapolated from solvent).
Vapour pressure	The solvant is significantly more volatile (ca 6 kPa) than the active substance (< 1 Pa anticipated).
Flammability	Flammable Liquid cat.2 Flash Point expected ca -4°C (extrapolated from solvent). No flammable properties expected if contact with air or water (based on chemical structure and experience).
Explosive properties	Explosive properties are not anticipated, based on chemical structure of both components.
Oxidising properties	No oxidising properties anticipated. (from use of analogues as a flame retardant and chemical structure of solvent)
Viscosity	Viscosity expected << 20.5 mm2/s at 40°C (as solution in heptane, extrapolated from solvent).
Other hazards	Contact with strong reducing or oxidising agents may release flammable and toxic products (phosphine, phosphorus oxides).