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Diss Factsheets

Toxicological information

Genetic toxicity: in vitro

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Administrative data

Endpoint:
in vitro gene mutation study in bacteria
Remarks:
Type of genotoxicity: gene mutation
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: see 'Remark'
Remarks:
Annex XI of Regulation 1907/2006 and the REACH Guidance (R 6.2) permits the grouping of chemicals (chemicals categorisation). Barratt and Illing (2007, revised 2009a; 2009b, see attachments in section 13 of IUCLID data set) set out justification for an initial grouping of the polyols (oligomers and polymers) using a named core substance, with varying numbers of attached propoxy groups (or propoxy and ethoxy groups). The properties of the core substance and the repeating unit should be reflected in the polyols. The repeating unit is essentially non-toxic. If there are toxic properties associated with a core substance, these properties should reduce with increasing numbers of repeating units (i.e. increasing molecular weight).If both the core substance and the repeating unit are non-toxic, it can be anticipated that there will be no toxicity in the polyol.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2002
Report date:
2002

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 471 (Bacterial Reverse Mutation Assay)
GLP compliance:
yes
Type of assay:
bacterial reverse mutation assay

Test material

Constituent 1
Reference substance name:
Oxy alkylation products of sucrose with propylenoxid
Cas Number:
9049-71-2
Molecular formula:
Not applicable (UVCB substance)
IUPAC Name:
Oxy alkylation products of sucrose with propylenoxid
Constituent 2
Chemical structure
Reference substance name:
Sucrose, propoxylated
EC Number:
500-029-3
EC Name:
Sucrose, propoxylated
Cas Number:
9049-71-2
Molecular formula:
C12H14O11-(C3H6O)nH8 sum of n: >1 - <16.5 mol PO
IUPAC Name:
Sucrose, propoxylated

Method

Species / strain
Species / strain / cell type:
other: Salmonella typhimurium strains TA1535, 1537, 102, 98 and 100
Metabolic activation:
with and without
Test concentrations with justification for top dose:
50-5000 µg/plate
Controls
Untreated negative controls:
yes
Negative solvent / vehicle controls:
no
True negative controls:
yes
Remarks:
Distilled water
Positive controls:
yes
Positive control substance:
other: 9-aminoacridine and Mitomycin C in the absence of S9 and 2-aminoacridine and Benzo(a)pyrene in the presence of S9
Details on test system and experimental conditions:
METHOD OF APPLICATION: Direct plate incorporation in agar

DURATION

- Exposure duration: All of the plates were incubated at 37°C for approximately 48 hours and the frequency of revertant colonies assessed using a Domino colony counter.

SELECTION AGENT (mutation assays):
SPINDLE INHIBITOR (cytogenetic assays):
STAIN (for cytogenetic assays):


NUMBER OF REPLICATIONS: 2 identical assays each carried out in triplicate.


NUMBER OF CELLS EVALUATED:


DETERMINATION OF CYTOTOXICITY
- Method: Colony Counts

Evaluation criteria:
A reproducible, dose-related and statistically significant increase (Dunnetts method of linear regression) in the revertant count in at least one strain of bacteria.
Statistics:
Dunnetts method of linear regression

Results and discussion

Test results
Species / strain:
other: Salmonella typhimurium strains TA1535, 1537, 102, 98 and 100
Metabolic activation:
with and without
Genotoxicity:
negative
Cytotoxicity / choice of top concentrations:
other: none
Additional information on results:

ADDITIONAL INFORMATION ON CYTOTOXICITY: No visible reduction in the growth of the bacterial background lawn at any dose level.
Remarks on result:
other: other: Salmonella typhimurium strains TA1535, 1537, 102, 98 and 100
Remarks:
Migrated from field 'Test system'.

Any other information on results incl. tables

Annex XI of Regulation 1907/2006 and the REACH Guidance (R 6.2) permits the grouping of chemicals (chemicals categorisation).Barratt and Illing (2007, revised 2009a; 2009b, see attachmentsin section 13 of IUCLID data set) set out justification for an initial grouping of the polyols (oligomers and polymers) using a named core substance, with varying numbers of attached propoxy groups (or propoxy and ethoxy groups). The properties of the core substance and the repeating unit should be reflected in the polyols. The repeating unit is essentially non-toxic. If there are toxic properties associated with a core substance, these properties should reduce with increasing numbers of repeating units (i.e. increasing molecular weight).If both the core substance and the repeating unit are non-toxic, it can be anticipated that there will be no toxicity in the polyol.

 

A second round of grouping was based on allocation of the NLP polyols formed from different named core substances to one of two categories. The first group was those NLP polyols linked to the core substance by an ether linkage (category 1) and the second group (category 2) was those linked by a secondary/tertiary amine linkage.

Category 1 consists of:

·        Sucrose, propoxylated, >1-16.5 moles propoxylated

·        propylidyne trimethanol, propoxylated, >1-6.5 moles propoxylated

·        Glycerin, propoxylated, >1-6.5 moles propoxylated

·        Propan-1,2-diol, propoxylated, >1-4.5 moles propoxylated

·        Pentaerythritol, propoxylated, >1-8.5 mol propoxylated.

·        Nitrilotriethanol, propoxylated, 1-6.5 moles propoxylated.

For details see attached documents ‘Grouping of NLP Polyols and their toxicokinetics assessments’ (Barratt and Illing (2007, revised 2009a) and PROPOSALS FOR FURTHER TESTING FOR THE NLP ‘POLYOLS’ (2009b) in section 13 of IUCLID data set. 

The registered substance is a complex substance (UVCB) which can be regarded as a mixture of Sucrose, PO and Glycerin, PO, two members of the grouping "NLP polyols linked to the core substance by an ether linkage" (= category 1). As, in all cases, the ether linked NLP polyols are non-toxic, it is anticipated that any mixture of them or any co-initiated polyol formed using a mixture of initiators will have a similar lack of toxicity. Thus the hazard profile for the multicomponent substance can be sufficiently described by the information of the individual constituents and it is unnecessary to test this co-initiated polyol.

The physico-chemical properties of these source substances and the target substance are very similar as displayed in Table 1 (test material is highlighted in yellow).

Table 1: Comparison of physico-chemical properties of source substances with target substance

 

 

Source Substances

Target Substance

 

Glycerin + PO

Sucrose + PO

Glycerin + Sucrose + PO

Appearance

liquid

liquid

liquid

Melting point

no MP

no MP

no MP

Boiling point

Decomposition >= 290°C

no BP

Decomposition >= 210°C

Relative density

1.08 (20°C)

1.122 (20°C)

1.132 (20°C)

Partition coefficient

> -1.82 < -0.73

> -3.60 < -3.25

> -0.7 < 1.1

Water solubility

completely miscible

240 g/L (25°C)

completely miscible

Surface tension

53 nM/m (20°C; at 1 mg/L)

54.54 nM/m (20°C; at 1 mg/L)

61.3 nM/m (20°C; at 1 mg/L)
(Glycerol + PO)

Flashpoint

163°C (no information on pressure available)

149.5°C (1003 hPa)

198°C (1013 hPa)

Auto flammability

305°C (1014 ha)

355°C (1000 hPa)

350°C (1008 hPa)

Flammability

no pyrophoric properties
does not emit flammable gases in contact with water

no pyrophoric properties
does not emit flammable gases in contact with water

no pyrophoric properties
does not emit flammable gases in contact with water

Explosiveness

no explosive properties

no explosive properties

no explosive properties

Oxidising properties

no oxidising properties

no oxidising properties

no oxidising properties

Viscosity

560.6 mPa (20°C)

26.63 Pa s (20°C)

21.47 mPa s (20°C)

 

Therefore, in line with Annex XI, 1.2 of Regulation (EC) No 1907/2006, read-across (many-to-one) was chosen for the registered substance (Polyether Sucrose + Glycerin+ PO) and thus no toxicological study has been performed with registered substance itself.

The model being used to justify read-across (many-to-one) is that the toxicity of the polyether polyol is derived from the core substance (initiator) and the repeating unit. While for propoxylated polyols the repeating unit is probably not classifiable, any toxicological property requiring classification is derived from the core substance. The fact, that the target chemical is formed from core substances (Sucrose and Glycerin) which are the same for two source substances (Sucrose, PO and Glycerin, PO), suggests that there are no major differences between these source substances and the target substance which may affect the toxicological properties. Due to the closeness of the compounds, polyols grouping data (= source substances data) is lead for Polyether Sucrose + Glycerin + PO (= target substance) according to Table 2 (see section 13 of IUCLID data set).

Applicant's summary and conclusion

Conclusions:
The test material was considered to be non-mutagenic under the conditions of this test.