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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Administrative data

Workers - Hazard via inhalation route

Systemic effects

Long term exposure
Hazard assessment conclusion:
DNEL (Derived No Effect Level)
Value:
3.24 mg/m³
Most sensitive endpoint:
repeated dose toxicity
Route of original study:
Oral
DNEL related information
DNEL derivation method:
ECHA REACH Guidance
Overall assessment factor (AF):
25
Modified dose descriptor starting point:
NOAEC
Value:
81.1 mg/m³
Explanation for the modification of the dose descriptor starting point:
Route-to-route extrapolation is applied in accordance with the ECHA REACH Guidance on Information Requirements R8 by dividing by the 8-hr respiratory volume of the rat (0.38 m3/kg bw), and corrected for light activity of the worker (6.7 m3/ 10 m3). The derived concentration is corrected for differences in oral and inhalation absorption with a default factor of 2, in accordance with the ECHA REACH Guidance, arriving at a NOAEC worker of 81.1 mg/m3.
AF for dose response relationship:
1
Justification:
Default factor for dose response relationship
AF for differences in duration of exposure:
2
Justification:
Default factor for sub-chronic to chronic
AF for interspecies differences (allometric scaling):
1
Justification:
Allometric scaling is included in the route-to-route extrapolation
AF for other interspecies differences:
2.5
Justification:
Default factor for remaining interspecies differences
AF for intraspecies differences:
5
Justification:
Default factor for intraspecies differences for workers
AF for the quality of the whole database:
1
Justification:
DNEL is derived from a reliable OECD 416 study
AF for remaining uncertainties:
1
Justification:
Since PTSI reacts immediately to PTSA upon contact with water or moisture, exposure will be to PTSA rather than PTSI. Therefore, the AF for Read Across is set at 1
Acute/short term exposure
Hazard assessment conclusion:
no hazard identified
DNEL related information

Local effects

Long term exposure
Hazard assessment conclusion:
high hazard (no threshold derived)
Most sensitive endpoint:
sensitisation (respiratory tract)
Acute/short term exposure
Hazard assessment conclusion:
medium hazard (no threshold derived)
Most sensitive endpoint:
irritation (respiratory tract)
DNEL related information

Workers - Hazard via dermal route

Systemic effects

Long term exposure
Hazard assessment conclusion:
DNEL (Derived No Effect Level)
Value:
0.92 mg/kg bw/day
Most sensitive endpoint:
repeated dose toxicity
Route of original study:
Oral
DNEL related information
DNEL derivation method:
ECHA REACH Guidance
Overall assessment factor (AF):
100
Modified dose descriptor starting point:
NOAEL
Value:
92 mg/kg bw/day
Explanation for the modification of the dose descriptor starting point:
Route-to-route extrapolation is applied in accordance with the ECHA REACH Guidance on Information Requirements R8. Based on the toxicokinetic assessment it is assumed that dermal absorption is similar to oral absorption and therefore no additional assessment factor had to be applied.
AF for dose response relationship:
1
Justification:
Default factor for dose response relationship
AF for differences in duration of exposure:
2
Justification:
Default factor for sub-chronic to chronic
AF for interspecies differences (allometric scaling):
4
Justification:
Default factor for allometric scaling rat to human
AF for other interspecies differences:
2.5
Justification:
Default factor for remaining interspecies differences
AF for intraspecies differences:
5
Justification:
Default factor for intraspecies differences for workers
AF for the quality of the whole database:
1
Justification:
DNEL is derived from a reliable OECD 416 study
AF for remaining uncertainties:
1
Justification:
Since PTSI reacts immediately to PTSA upon contact with water or moisture, exposure will be to PTSA rather than PTSI. Therefore, the AF for Read Across is set at 1
Acute/short term exposure
Hazard assessment conclusion:
no hazard identified
DNEL related information

Local effects

Long term exposure
Hazard assessment conclusion:
no hazard identified
Acute/short term exposure
Hazard assessment conclusion:
medium hazard (no threshold derived)
Most sensitive endpoint:
skin irritation/corrosion

Workers - Hazard for the eyes

Local effects

Hazard assessment conclusion:
medium hazard (no threshold derived)

Additional information - workers

For systemic effects, DNELs were derived for inhalation, dermal and oral exposure using the oral OECD416 study in which a NOAEL of 92 mg/kg bw/d was obtained based on decreased body and organ weights in males and females at the mid- and high dose levels.

No DNELs were derived for local effects. However qualitative hazard levels were determined in accordance with the Guidance on Information Requirements and Chemical Safety Assessment, Part E Risk Characterisation. Based on the Annex VI classification for respiratory sensitisation, PTSI should be regarded a high hazard for long-term local effects via inhalation.

Based on its violent reactivity and associated suspected irritant properties, for acute/short-term exposure PTSI should be regarded as a medium hazard.

General Population - Hazard via inhalation route

Systemic effects

Long term exposure
Hazard assessment conclusion:
DNEL (Derived No Effect Level)
Value:
0.8 mg/m³
Most sensitive endpoint:
repeated dose toxicity
Route of original study:
Oral
DNEL related information
DNEL derivation method:
ECHA REACH Guidance
Overall assessment factor (AF):
50
Modified dose descriptor starting point:
NOAEC
Value:
40 mg/m³
Explanation for the modification of the dose descriptor starting point:
Route-to-route extrapolation is applied by dividing by the 24-hr respiratory volume of the rat (1.15 m3/kg bw). The derived concentration is corrected for differences in oral and inhalation absorption with a default factor of 2, in accordance with the ECHA REACH Guidance, arriving at a NOAEC general public of 40.0 mg/m3.
AF for dose response relationship:
1
Justification:
Default factor for dose response relationship
AF for differences in duration of exposure:
2
Justification:
Default factor for sub-chronic to chronic
AF for interspecies differences (allometric scaling):
1
Justification:
Allometric scaling is included in the route-to-route extrapolation
AF for other interspecies differences:
2.5
Justification:
Default factor for remaining interspecies differences
AF for intraspecies differences:
10
Justification:
Default factor for intraspecies differences for general population
AF for the quality of the whole database:
1
Justification:
DNEL is derived from a reliable OECD 416 study
AF for remaining uncertainties:
1
Justification:
Since PTSI reacts immediately to PTSA upon contact with water or moisture, exposure will be to PTSA rather than PTSI. Therefore, the AF for Read Across is set at 1
Acute/short term exposure
Hazard assessment conclusion:
no hazard identified
DNEL related information

Local effects

Long term exposure
Hazard assessment conclusion:
high hazard (no threshold derived)
Most sensitive endpoint:
sensitisation (respiratory tract)
Acute/short term exposure
Hazard assessment conclusion:
medium hazard (no threshold derived)
Most sensitive endpoint:
irritation (respiratory tract)
DNEL related information

General Population - Hazard via dermal route

Systemic effects

Long term exposure
Hazard assessment conclusion:
DNEL (Derived No Effect Level)
Value:
0.46 mg/kg bw/day
Most sensitive endpoint:
repeated dose toxicity
Route of original study:
Oral
DNEL related information
DNEL derivation method:
ECHA REACH Guidance
Overall assessment factor (AF):
200
Modified dose descriptor starting point:
NOAEL
Value:
92 mg/kg bw/day
Explanation for the modification of the dose descriptor starting point:
Route-to-route extrapolation is applied in accordance with the ECHA REACH Guidance on Information Requirements R8. Based on the toxicokinetic assessment it is assumed that dermal absorption is similar to oral absorption and therefore no additional assessment factor had to be applied.
AF for dose response relationship:
1
Justification:
Default factor for dose response relationship
AF for differences in duration of exposure:
2
Justification:
Default factor for sub-chronic to chronic
AF for interspecies differences (allometric scaling):
4
Justification:
Default factor for allometric scaling rat to human
AF for other interspecies differences:
2.5
Justification:
Default factor for remaining interspecies differences
AF for intraspecies differences:
10
Justification:
Default factor for intraspecies differences for general population
AF for the quality of the whole database:
1
Justification:
DNEL is derived from a reliable OECD 416 study
AF for remaining uncertainties:
1
Justification:
Since PTSI reacts immediately to PTSA upon contact with water or moisture, exposure will be to PTSA rather than PTSI. Therefore, the AF for Read Across is set at 1
Acute/short term exposure
Hazard assessment conclusion:
no hazard identified
DNEL related information

Local effects

Long term exposure
Hazard assessment conclusion:
no hazard identified
Acute/short term exposure
Hazard assessment conclusion:
medium hazard (no threshold derived)
Most sensitive endpoint:
skin irritation/corrosion

General Population - Hazard via oral route

Systemic effects

Long term exposure
Hazard assessment conclusion:
DNEL (Derived No Effect Level)
Value:
0.46 mg/kg bw/day
Most sensitive endpoint:
repeated dose toxicity
Route of original study:
Oral
DNEL related information
DNEL derivation method:
ECHA REACH Guidance
Overall assessment factor (AF):
200
Modified dose descriptor starting point:
NOAEL
Value:
92 mg/kg bw/day
AF for dose response relationship:
1
Justification:
Default factor for dose response relationship
AF for differences in duration of exposure:
2
Justification:
Default factor for sub-chronic to chronic
AF for interspecies differences (allometric scaling):
4
Justification:
Default factor for allometric scaling rat to human
AF for other interspecies differences:
2.5
Justification:
Default factor for remaining interspecies differences
AF for intraspecies differences:
10
Justification:
Default factor for intraspecies differences for general population
AF for the quality of the whole database:
1
Justification:
DNEL is derived from a reliable OECD 416 study
AF for remaining uncertainties:
1
Justification:
Since PTSI reacts immediately to PTSA upon contact with water or moisture, exposure will be to PTSA rather than PTSI. Therefore, the AF for Read Across is set at 1
Acute/short term exposure
Hazard assessment conclusion:
no hazard identified
Most sensitive endpoint:
acute toxicity
Route of original study:
Oral
DNEL related information

General Population - Hazard for the eyes

Local effects

Hazard assessment conclusion:
medium hazard (no threshold derived)

Additional information - General Population

For systemic effects, DNELs were derived for inhalation, dermal and oral exposure using the oral OECD416 study in which a NOAEL of 92 mg/kg bw/d was obtained based on decreased body and organ weights in males and females at the mid- and high dose levels.

No DNELs were derived for local effects. However qualitative hazard levels were determined in accordance with the Guidance on Information Requirements and Chemical Safety Assessment, Part E Risk Characterisation. Based on the Annex VI classification for respiratory sensitisation, PTSI should be regarded a high hazard for long-term local effects via inhalation.

Based on its violent reactivity and associated suspected irritant properties, for acute/short-term exposure PTSI should be regarded as a medium hazard.