Amines, C36-alkylenedi-

Endpoint summary

Key value for chemical safety assessment

Skin sensitisation

Link to relevant study records

Reference

Endpoint:

skin sensitisation: in vivo (non-LLNA)

Type of information:

migrated information: read-across from supporting substance (structural analogue or surrogate)

Adequacy of study:

supporting study

Study period:

04 Apr - 27 Apr 1979

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: Study conducted according to accepted standards at time of performance. Basic data given and well documented. No GLP study.

Qualifier:

equivalent or similar to guideline

Guideline:

OECD Guideline 406 (Skin Sensitisation)

Deviations:

yes

Remarks:

- limited documentation

GLP compliance:

no

Remarks:

study was conducted before GLP was implemented

Type of study:

guinea pig maximisation test

Species:

guinea pig

Strain:

Dunkin-Hartley

Sex:

female

Details on test animals and environmental conditions:

TEST ANIMALS
- Source: Porcellus Animals Ltd.
- Weight at study initiation: 300-400 g
- Housing: 5 animals per cage
- Diet (e.g. ad libitum): ad libitum
- Water (e.g. ad libitum): water; ad libitum

Route:

other: intradermal and epicutaneous (occlusive)

Vehicle:

water

Concentration / amount:

The test substance was diluted to 1% concentration (w/w) in water for intradermal induction, to 5% concentration (w/w) in water for epicutaneous
induction and to 2% concentration (w/w) in water for epicutaneous challenge.

Route:

epicutaneous, occlusive

Vehicle:

water

Concentration / amount:

The test substance was diluted to 1% concentration (w/w) in water for intradermal induction, to 5% concentration (w/w) in water for epicutaneous
induction and to 2% concentration (w/w) in water for epicutaneous challenge.

No. of animals per dose:

10 (test group)
5 (control group)

Details on study design:

RANGE FINDING TESTS: Preliminary tests indicated that the test article was moderately irritant at 10% (w/w) and 5% (w/w) and should be non-irritant at a concentration of 2% (w/w) in water on adjuvant pre-treated animals when applied to the shaved flank under occlusion.

MAIN STUDY
A. INDUCTION EXPOSURE
intradermal phase:
The hair was removed from an area 4x6 cm across the scapular region of 10 animals. Two rows of 3 intradermal injections were given on each side of the mid-line as follows:
0.1 mL Freund´s adjuvant alone
0.1 mL test agent alone
0.5 mL test agent emulsified with 0.05 mL Freund´s adjuvant

epicutaneous phase:
6 days after the injection phase, the injection site was shaved again and treated with 10% sodium lauryl sulphate for 24 h (unbandaged) to provoke a inflammatory reaction.
24 h later, a 2x2 cm patch of Whatman No. 3 MM filter paper saturated with the test article (5% w/w in water) was applied to the pre-treated area for
48 h and the patch covered by an overlapping patch of impermeable plastic adhesive tape (Blenderm). The whole area was then firmly bound by Sleek occlusive tape.

B. CHALLENGE EXPOSURE
Two weeks after the epicutaneous induction a 5x5 cm area on the right flank of each test animal was shaved. A test concentration of 2% (w/w) in water was applied on a 2x2 cm patch of Whatman No. 3 MM filter paper to the prepared test site of the animals. The patch was covered by an overlapping patch of impermeable plastic adhesive tape (Blenderm). The whole area was then firmly bound by Sleek occlusive tape. The patch was removed 24 h later.

Challenge controls:

5 animals were injected with Freund´s adjuvant only (2 injections of 0.1 mL) at the induction phase. At the challenge phase, the test article was applied at a concentration of 2% (w/w, in water) to the shaved right flanks of 5 animals which had pre-treatment with adjuvant only at the induction phase.

Positive control substance(s):

not specified

Reading:

1st reading

Hours after challenge:

24

Group:

test chemical

Dose level:

2 %

No. with + reactions:

0

Total no. in group:

10

Clinical observations:

no clinical findings

Remarks on result:

other: Reading: 1st reading. . Hours after challenge: 24.0. Group: test group. Dose level: 2 %. No with. + reactions: 0.0. Total no. in groups: 10.0. Clinical observations: no clinical findings.

Reading:

1st reading

Hours after challenge:

24

Group:

negative control

Dose level:

0 %

No. with + reactions:

0

Total no. in group:

7

Clinical observations:

no clinical findings

Remarks on result:

other: Reading: 1st reading. . Hours after challenge: 24.0. Group: negative control. Dose level: 0 %. No with. + reactions: 0.0. Total no. in groups: 7.0. Clinical observations: no clinical findings.

The test article was tested at the challenge phase, on 5 animals which were adjuvant pre-treated only. None of these control animals reacted positively to the epicutaneous application at the challenge phase. Therefore a test concentration of 2% (w/w) in water would be non-irritant.

The test article did not elicit positive responses in the test group after challenge of the 10 animals by epicutaneous application at the challenge phase. From these results it is concluded that this product is a non-sensitiser in guinea pigs.

Interpretation of results:

not sensitising

Remarks:

Migrated information

Conclusions:

The sensitization potential of Stearyl Amine ("Amine HBG") was investigated by the Magnusson-Kligman maximization method. Based on the study results there is no evidence that this material is a sensitizer in guinea pigs.

Executive summary:

In a non-GLP-compliant study according to OECD TG 406 (Magnusson-Kligmann guinea pig - maximisation test), 10 female guinea pigs (strain Dunkin-Hartley + 5 control animals) were treated with hydrogenated tallow alkylamines ("Amin HBG"), a semi-solid beige-coloured paste (purity not given). At the intradermal induction stage, 0.5 ml test substance emulsified with 0.05ml Freund's adjuvant was injected s.c. (additional injections: 0.1 ml Freund's adjuvant alone + 0.1 ml test agent). Prior to injection, the test substance was diluted with water to 1% w/w. 6 days after injections, the skin at the treatment site was shaved once again and treated with 10% sodium lauryl sulfate to provoke an inflammatory reaction. 24 hours later, the treatment sites were occlusively covered with a 2 x 2 cm filter patch, saturated with 5% aqueous hydrogenated tallow alkylamines for 48 hours (topical induction). A 2% concentration of Amine HBG was selected for the final challenge. 14 days after the first challenge, the second challenge was performed (24h closed patch exposure). No positive responses were observed in the 10 induced and rechallenged animals (readings not given)

Endpoint conclusion

Endpoint conclusion:

no adverse effect observed (not sensitising)

Additional information:

Profiling properties show that C36-alkylenediamine is not expected to bind to protein.

Cross-reading to Primary alkyl amines can be considered on the basis of similarities of structure with same functional groups, leading to common biological activity, and common metabolic degradation. ( For full justification see document “Justification in support of cross-reading from primary fatty amines (PFA) to Dimerdiamine”.) A Guinea pig maximisation test with tallow-alkylamines showed that this long-chain alkyl amine is not sensitising. Substance is irritative / corrosive to skin, and use is only as industrial intermediate. Consequently exposure will be limted, and further testing is not mandatory, also based on animal welfare grounds.

Migrated from Short description of key information:
Cross-reading to Primary alkyl amines can be considered on the basis of similarities of structure with same functional groups, leading to common biological activity, and common metabolic degradation. A Guinea pig maximisation test with tallow-alkylamines showed that this long-chain alkyl amine is not sensitising.

Justification for selection of skin sensitisation endpoint:
Data available from cross-reading.

Respiratory sensitisation

Endpoint conclusion

Endpoint conclusion:

no study available

Additional information:

No data available. Due to the very low vapour pressure (2.2 x10-5 hPa @ 20°C) inhalation of vapours is unlikely. Also aerosol exposures are not likely to occur in view of its only use as industrial intermediate under conditions that do not lead to aerosol formation. No concerns are expected in view of lack of exposure.

Justification for classification or non-classification

Available data based on cross-reading indicates to non-sensiting properties.