Tetrakis(hydroxymethyl)phosphonium sulphate(2:1)

Flash point

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

flash point of flammable liquids

Type of information:

experimental study

Adequacy of study:

key study

Study period:

15 December 1999

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

study well documented, meets generally accepted scientific principles, acceptable for assessment

Qualifier:

no guideline followed

Principles of method if other than guideline:

A standard Pensky-Martens apparatus was used for this determination. 75mL of Tolcide PS75 was charged to the apparatus and the pilot as jet was ignited. The heating block was heated by a gas flame and the rate of heating was approximately 5°C per minute.
The sample started at 20°C and the shutter was closed. As the temperature rose, the shutter mechanism was operated every 5°C so that, if flammable vapour were to be present, it would ignite and produce a "flash".

GLP compliance:

no

Other quality assurance:

other: Quality assurance inspection signed on 16 Dec 1999.

Remarks:

Report reviewed according to the Quality Programme set out by the Water Management Chemicals Business. The reported methods and procedures were found to describe those used and the results constitute an accurate representation of the data recorded.

Type of method:

closed cup

Flash point apparatus:

Pensky-Martens apparatus

Specific details on test material used for the study:

Tolcide PS75 as marketed

Key result

Remarks on result:

not determinable, other reason:

Remarks:

No flash occured up to 105°C at which point the pilot flame was extinguished by the steam from the hot sample.

No flash occured up to 105°C at which point the pilot flame was extinguished by the steam from the hot sample. Shortly after this point, the sample boiled and poured out over the heating block and past the main heating flame. At no point was there any signs of ignition.

Interpretation of results:

GHS criteria not met

Conclusions:

The test demostrates that THPS 75% in aqueous solution (Tolcide PS75 as marketed) does not have a flash point up to 105°C and is not flammable.

Executive summary:

Tolcide PS75 as marketed (containing 75% THPS in aqueous solution) was tested for flash point using the Pensky-Martens apparatus according to a closed cup method. The test was not performed under GLP, but was inspected by internal Quality Assurance. The study is well documented and meets generally accepted scientific principles and therefore was assessed as reliable with restritions for CLP and risk assessment purposes.

75mL of Tolcide PS75 was charged to the apparatus and the pilot as jet was ignited. The heating block was heated by a gas flame and the rate of heating was approximately 5°C per minute.

The sample started at 20°C and the shutter was closed. As the temperature rose, the shutter mechanism was operated every 5°C so that, if flammable vapour were to be present, it would ignite and produce a "flash".

No flash occured up to 105°C at which point the pilot flame was extinguished by the steam from the hot sample. Shortly after this point, the sample boiled and poured out over the heating block and past the main heating flame. At no point was there any signs of ignition.

The test demostrates that THPS 75% in aqueous solution (Tolcide PS75 as marketed) does not have a flash point up to 105°C and is not flammable.

Reference 2

Endpoint:

flash point of flammable liquids

Type of information:

experimental study

Adequacy of study:

supporting study

Study period:

2nd October 1998

Reliability:

4 (not assignable)

Rationale for reliability incl. deficiencies:

documentation insufficient for assessment

Qualifier:

no guideline followed

Principles of method if other than guideline:

Pensky-Martins method

GLP compliance:

no

Other quality assurance:

other: Quality assurance inspection signed on 8 October 1998.

Remarks:

Report reviewed according to the Quality Programme set out by the Water Management Chemicals Business. The reported methods and procedures were found to describe those used and the results constitute an accurate representation of the data recorded.

Type of method:

closed cup

Specific details on test material used for the study:

Tolcide PS75

Key result

Remarks on result:

no flash point - measurement carried out until boiling temperature

The report summarises work carried out by R.E. Talbot in July 1998.

Interpretation of results:

GHS criteria not met

Executive summary:

THPS 75% was tested for flash point using the Pensky-Martins method. The test was not performed under GLP, but was inspected by the Quality Assurance. However, the information in the study report doesn't allow to assess the reliability of the study.

THPS 75% was considered to have no flash point, since the substance reached boiling point with no sign of ignition.

Description of key information

Two similar studies were performed to measure the flash point of THPS at 75% in aqueous solution as marketed (Tolcide PS75) using the Pensky-Martens apparatus according to a closed cup method. The test were not performed under GLP, but were inspected by internal Quality Assurance. The study of Talbot (1999) is well documented and meets generally accepted scientific principles and therefore was assessed as reliable key study (with restritions) for CLP and risk assessment purposes. The study of Fidoe is not well documented and its reliability cannot be assessed however, the result being consistent with the Talbot study it is used as supporting study.

In the key study, no flash occured up to 105°C at which point the pilot flame was extinguished by the steam from the hot sample. Shortly after this point, the sample boiled and poured out over the heating block and past the main heating flame. At no point was there any signs of ignition.

In the supporting study, THPS 75% was considered to have no flash point since the substance reached boiling point with no sign of ignition.

The tests demostrate that THPS 75% in aqueous solution (Tolcide PS75 as marketed) does not have a flash point up to 105°C and is not flammable.