Titanium 2-hydroxy-1,2,3-propanetricarboxylate (2:5)

Appearance / physical state / colour

Link to relevant study record(s)

Reference

Endpoint:

appearance / physical state / colour

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

test procedure in accordance with generally accepted scientific standards and described in sufficient detail

Qualifier:

no guideline required

Principles of method if other than guideline:

Visual inspection

GLP compliance:

not specified

Physical state at 20°C and 1013 hPa:

liquid

Remarks:

liquid used for CSA

Key result

Form:

liquid

Remarks:

Would be solid if possible to isolate

Colour:

Light brown

Substance type:

organometallic

Conclusions:

Citric acid, titanium salt is a light brown solid when in the absence of water and at ambient temperature (20 °C) and pressure (101.3 kPa). Due to the nature of the manufacturing route and of the applications into which the substance is used, the solid substance is, however, never isolated. As water is removed the required processing of the increasingly viscous liquid becomes significantly difficult and could lead to decomposition of the desired substance if too forcing conditions are used for water removal. As a result the material is prepared as a 55 wt.% solution of the substance in 45 wt.% water.

Executive summary:

Citric acid, titanium salt is a solid when in the absence of water and at ambient temperature (20 °C) and pressure (101.3 kPa). Due to the nature of the manufacturing route and of the applications into which the substance is used, the solid substance is, however, never isolated. As water is removed the required processing of the increasingly viscous liquid becomes significantly difficult and could lead to decomposition of the desired substance if too forcing conditions are used for water removal. As a result the material is prepared as a 55 wt.% solution of the substance in 45 wt.% water.

Under conditions of heating, hydroxides/oxides will form and heating to high temperatures leads to charring of the citrate (turns black)

Description of key information

Citric acid, titanium salt is a solid when in the absence of water and at ambient temperature (20 °C) and pressure (101.3 kPa). Due to the nature of the manufacturing route and of the applications into which the substance is used, the solid substance is, however, never isolated and doing so is a difficult, process intensive task. As water is removed the required processing of the increasingly viscous liquid becomes significantly difficult and could lead to decomposition of the desired substance if too forcing conditions are used for water removal. As a result the material is prepared as a 55 wt.% solution of the substance in 45 wt.% water.

At high temperatures needed to force water off, hydroxides / oxides will form.

It was not possible to produce a dry material for testing that was considered to be unchanged chemically by the drying process. The substance darkens in colour and chars at > 175 C forming a dark solid.

Key value for chemical safety assessment

Physical state at 20°C and 1013 hPa:

liquid

Additional information

Considered liquid for purposes of CSA