Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

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

This phosphite hydrolyses rapidly with half-lives in the range of 0.5 to 20 hours. Therefore the CSA will evaluate its hydrolysis products - phenol, isodecanol, and phosphorous acid.

Phenol PNECs

Phenol is one of the primary hydrolysis product for this phosphite, with most consistuents producing 1 to 3 moles of phenol per mole of phosphite. 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)

 

Isodecanol PNECs

Isodecanol is the other primary hydrolysis product for this phosphite, with most consistuents producing 1 to 3 moles of isodecanol per mole of phosphite. Isodecanol is well studied and has already been separately registered under REACH.  The PNECs from this registration are below.

Substance: 271-234-0 / 68526-85-2 / Isodecanol

REACH registration number: 01-2119449807-26-0000

 

6 Ecotoxicological Information

Endpoint summary: Ecotoxicological Information/Isodecanol/68526-85-2

 

PNEC aqua (freshwater) - 0.4 mg/L

Assessment factor - 1

Extrapolation method - assessment factor

Simple non-polar narcotic mixture of alcohol isomers. 3 long-term endpoints.

 

PNEC aqua (marine waters) - 0.4 mg/L

Assessment factor - 1

Extrapolation method - assessment factor

Simple non-polar narcotic mixture of alcohol isomers. 3 long-term endpoints.

 

PNEC aqua (intermittent releases) - 2.78 mg/L

Assessment factor - 1

Extrapolation method - assessment factor

Simple non-polar narcotic mixture of alcohol isomers. 3 acute endpoints.

 

PNEC STP - 4.3 mg/L

Assessment factor - 10

Extrapolation method - assessment factor

The PNEC for sewage treatment plant was determined using the NOEC for an STP inoculum from a ready biodegradation test.

 

PNEC sediment - 117mg/kg sediment dw

Assessment factor - 1

Extrapolation method - assessment factor

 

 Environmental classification justification

 Experimental sediment toxicity data for isodecanol are not available. PNECs for the sediment compartment were

derived based on the results from three long-term endpoints representing three trophic levels, as well as the

Equilibrium Partitioning Method.

PNEC soil - 95 mg/kg soil dw

Assessment factor - 1

Extrapolation method - assessment factor

Isodecanol is expected to have a low potential to produce toxicity in terrestrial species (earthworm and plants), based on (Q)SAR predictions and the Equilibrium Partitioning Method.

 

PNEC oral - 22.22 mg/kg food

 Assessment factor - 90

Based on a 13 week rat NOAEL of 100 mg/kg/d with iso-undecanol. Conversion factor for rats used was 20 bw/dwi. Assessment factor for 90 day study used (90). Results have been reported in mg/kg food. Secondary poisoning for alcohols, C9 -11 -iso, C10 -rich is not expected based on results from bioconcentration studies asdescribed in Section 4.3.1.2 and evidence of biotransformation and metabolism as reported by deWolf and Parkerton (1999). Alcohols, C9 -11 -iso, C10 -rich is not classified and labeled for the environment based on available toxicity data

and ready biodegradability.

Since isodecanol has higher PNECs than phenol, the environmental exposure and risk assessment has focused just on phenol (conservatively assuming that all of this phosphite released into the environment becomes phenol).

Phosphorous Acid

Phosphites produce one mole of phosphorous acid upon hydrolysis. Since phosphorous acid is less toxic to environmental organisms than phenol, the environmental exposure and risk assessment has focused just on phenol (conservatively assuming that all of this phosphite released into the environment becomes phenol).

Conclusion on classification

This classification for this substance has been updated to include Chronic Aquatic 3 (H412) given the recent classification of phenol as Chronic Aquatic 2 (H411) and relevative potential for DDPP to produce phenol in the environment. DDPP has a low water solubility and what does dissolve hydrolyses rapidly to phenol, isodecyl alcohol and phosphorous acid. This low water solubility will limit the amount of phenol that can be released to the water from DDPP.