Registration Dossier
Registration Dossier
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EC number: 202-908-4 | CAS number: 101-02-0
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- no data available: testing technically not feasible
Marine water
- Hazard assessment conclusion:
- no data available: testing technically not feasible
STP
- Hazard assessment conclusion:
- no data available: testing technically not feasible
Sediment (freshwater)
- Hazard assessment conclusion:
- no data available: testing technically not feasible
Sediment (marine water)
- Hazard assessment conclusion:
- no data available: testing technically not feasible
Hazard for air
Air
- Hazard assessment conclusion:
- no hazard identified
Hazard for terrestrial organisms
Soil
- Hazard assessment conclusion:
- no data available: testing technically not feasible
Hazard for predators
Secondary poisoning
- Hazard assessment conclusion:
- no potential for bioaccumulation
Additional information
TPP hydrolyzes rapidly (0.5 -1 hr) half-life and therefore the CSA will evaluate its primary hydrolysis product - phenol.
Phenol PNECs
Upon hydrolysis, one mole of TPP produces three moles of phenol. As such, it is the primary hydrolysis product for TPP. Phenol is well studied and reviewed. There are established PNECs in the published risk assessment report (ECB 2006 Phenol Risk Assessment).
PNECaqua= 7.7 μg/l (ECB 2006 Phenol Risk Assessment)
PNECmicroorganism= 2.1 mg/l (ECB 2006 Phenol Risk Assessment)
PNECsoil= 136 μg/kg dry weight (ECB 2006 Phenol Risk Assessment)
PNECsediment =115.6 mg/kg dw (ECB 2006 Phenol Risk Assessment)
Phosphorous Acid
Phosphorous acid is also a hydrolysis product of TPP; one mole of TPP produces one mole of phosphorous acid. Since the element phosphorous is an essential plant nutrient and phosphorous acid and its salts have low relatively low plant, animal and human toxicity, it appears that phosphorous acid will not have a significant impact on the environmental assessment of TPP. As such, the environmental assessment has focused just on phenol.
Conclusion on classification
TPP was classified as R50 -53 in the existing harmonised classifications. However, due to its low water solubility and rapid hydrolysis, it appears that TPP poses no hazard to the environment. The hydrolysis products, phenol and phosphorous acid, are not classified as dangerous to the environment. The registrants intend to seek a review and change to the existing harmonised classifications for TPP for the environment.
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