[nitrilotris(methylene)]trisphosphonic acid, ammonium salt

Auto flammability

Link to relevant study record(s)

Reference

Endpoint:

relative self-ignition temperature (solids)

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

guideline study with acceptable restrictions

Principles of method if other than guideline:

TGA method

GLP compliance:

no

Remarks on result:

other: TGA experiments on a solution of ATMP were run under nitrogen up to 500°C giving a black residue and under air atmosphere up to 400°C giving a brown-black residue. Only this last residue was analysed by 31-P NMR in water.

TGA experiments on a solution of ATMP were run under nitrogen up to 500°C giving a black residue and under air atmosphere up to 400°C giving a brown-black residue. Only this last residue was analysed by 31-P NMR in water.

Conclusions:

The self-ignition temperature study does not need to be conducted as a preliminary test showed no evidence of self-heating up to 400°C.

Description of key information

Relative self-ignition temperature [ATMP-xNH4]: No relative self-ignition observed up to 400°C

Additional information

In accordance with Column 2 of REACH Annex VII, the self-ignition properties study (required in Section 7.12) does not need to be conducted as a preliminary test on the parent acid (ATMP-H) showed no evidence of self-heating up to 400°C. ATMP-xK is expected to have a self ignition temperature greater than 400°C.

This conclusion is supported by the result of a TGA experiment on a solution of ATMP-H which indicate that no evidence of self-heating up to 400°C was observed for ATMP-H. This result is read-across to the salt.