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Toxicological information

Skin sensitisation

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Administrative data

Endpoint:
skin sensitisation: in vivo (non-LLNA)
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: OECD guideline study-GLP compliance

Data source

Reference
Reference Type:
other: Body responsible for the test
Title:
Unnamed
Year:
2011

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
other: Method B6 of 92/69/EEC or OECD 406
GLP compliance:
yes
Type of study:
guinea pig maximisation test

Test material

Constituent 1
Chemical structure
Reference substance name:
-
EC Number:
425-220-8
EC Name:
-
Cas Number:
5945-33-5
Molecular formula:
C39H34O8P2
IUPAC Name:
4-(2-{4-[(diphenoxyphosphoryl)oxy]phenyl}propan-2-yl)phenyl diphenyl phosphate; 4-{2-[4-({[4-(2-{4-[(diphenoxyphosphoryl)oxy]phenyl}propan-2-yl)phenoxy](phenoxy)phosphoryl}oxy)phenyl]propan-2-yl}phenyl diphenyl phosphate

In vivo test system

Test animals

Species:
other: guinea pig, albino Dunkin-Hartley

Study design: in vivo (non-LLNA)

Inductionopen allclose all
Route:
intradermal and epicutaneous
Vehicle:
arachis oil
Concentration / amount:
Concentration of test material and vehicle used at induction:
Intradermal induction:

FCA in distilled water (1:1)

5% w/v formulation of test material in arachis oil

5% w/v formulation of test material in 1:1 preparation of FCA in distilled water

Topical induction:

75% w/v in arachis oil

Concentration of test material and vehicle used for each challenge:
50% and 75% w/v in arachis oil
Challenge
Concentration / amount:
Concentration of test material and vehicle used at induction:
Intradermal induction:

FCA in distilled water (1:1)

5% w/v formulation of test material in arachis oil

5% w/v formulation of test material in 1:1 preparation of FCA in distilled water

Topical induction:

75% w/v in arachis oil

Concentration of test material and vehicle used for each challenge:
50% and 75% w/v in arachis oil
No. of animals per dose:
10 animals in test group
5 animals in negative control group

Results and discussion

In vivo (non-LLNA)

Resultsopen allclose all
Reading:
1st reading
Hours after challenge:
24
Group:
test chemical
Dose level:
50 %
No. with + reactions:
0
Total no. in group:
10
Remarks on result:
other: Reading: 1st reading. . Hours after challenge: 24.0. Group: test group. Dose level: 50 %. No with. + reactions: 0.0. Total no. in groups: 10.0.
Reading:
1st reading
Hours after challenge:
24
Group:
test chemical
Dose level:
75 %
No. with + reactions:
0
Total no. in group:
10
Remarks on result:
other: Reading: 1st reading. . Hours after challenge: 24.0. Group: test group. Dose level: 75 %. No with. + reactions: 0.0. Total no. in groups: 10.0.
Reading:
2nd reading
Hours after challenge:
48
Group:
test chemical
Dose level:
50 %
No. with + reactions:
0
Total no. in group:
10
Remarks on result:
other: Reading: 2nd reading. . Hours after challenge: 48.0. Group: test group. Dose level: 50 %. No with. + reactions: 0.0. Total no. in groups: 10.0.
Reading:
2nd reading
Hours after challenge:
48
Group:
test chemical
Dose level:
75 %
No. with + reactions:
0
Total no. in group:
10
Remarks on result:
other: Reading: 2nd reading. . Hours after challenge: 48.0. Group: test group. Dose level: 75 %. No with. + reactions: 0.0. Total no. in groups: 10.0.
Reading:
1st reading
Hours after challenge:
24
Group:
negative control
Dose level:
50 %
No. with + reactions:
0
Total no. in group:
5
Remarks on result:
other: Reading: 1st reading. . Hours after challenge: 24.0. Group: negative control. Dose level: 50 %. No with. + reactions: 0.0. Total no. in groups: 5.0.
Reading:
1st reading
Hours after challenge:
24
Group:
negative control
Dose level:
75 %
No. with + reactions:
0
Total no. in group:
5
Remarks on result:
other: Reading: 1st reading. . Hours after challenge: 24.0. Group: negative control. Dose level: 75 %. No with. + reactions: 0.0. Total no. in groups: 5.0.
Reading:
2nd reading
Hours after challenge:
48
Group:
negative control
Dose level:
50 %
No. with + reactions:
0
Total no. in group:
5
Remarks on result:
other: Reading: 2nd reading. . Hours after challenge: 48.0. Group: negative control. Dose level: 50 %. No with. + reactions: 0.0. Total no. in groups: 5.0.
Reading:
2nd reading
Hours after challenge:
48
Group:
negative control
Dose level:
75 %
No. with + reactions:
0
Total no. in group:
5
Remarks on result:
other: Reading: 2nd reading. . Hours after challenge: 48.0. Group: negative control. Dose level: 75 %. No with. + reactions: 0.0. Total no. in groups: 5.0.

Any other information on results incl. tables

Maximum concentration not causing irritating effects in preliminary test: 75 %

Signs of irritation during induction:

Very slight (3 animals) to moderate to severe erythema (7 animals) was noted after the intradermal induction at the 24 hour reading, and very slight to severe erythema after 48 hours.

After topical induction, very slight erythema was observed in all test animals and very slight oedema was noted in 4 test group animals at the 1 -hour reading. No dermal reactions were noted after 24 hours.

Evidence of sensitisation of each challenge concentration: No sensitisation observed.

Other observations:

One test animal was killed for humane reasons on day 16. Its absence was not considered to affect the purpose or integrity of the study.

Applicant's summary and conclusion

Interpretation of results:
other: not classified