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Toxicological information

Skin irritation / corrosion

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Administrative data

Endpoint:
skin irritation: in vivo
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2007-11-16 to 2007-04-04
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP-guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2008
Report Date:
2008

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to
Guideline:
OECD Guideline 404 (Acute Dermal Irritation / Corrosion)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method B.4 (Acute Toxicity: Dermal Irritation / Corrosion)
Deviations:
no
Qualifier:
according to
Guideline:
EPA OPPTS 870.2500 (Acute Dermal Irritation)
Deviations:
no
Principles of method if other than guideline:
not applicable
GLP compliance:
yes (incl. certificate)

Test material

Reference
Name:
Unnamed
Type:
Constituent
Type:
Constituent
Test material form:
other: liquid/paste
Details on test material:
- Name of test material (as cited in study report): N-C12,14 alkyl-1,3-diaminopropane
- Physical state: liquid/ paste
- Purity test date: 2007-10-15
- Composition of test material, percentage of components:
N-Alkyl-1,3-diaminopropanes: 94%
N-Alkyl-amines: 6%

Total Primary amines: 5.7 %
Total Diamines: 94.3 %
Iodine number: 2 g I/100g (0-3)
Water: 0.42 % (0-0.5 %)

C12 N Primary amine: 4.3 %
C14 N Primary amine: 1.3 %
C16 N Primary amine: 0.1 %
C12 Diamine: 73.4 %
C14 Diamine: 20.2 %
C16 Diamine: 0.7 %

Acrylnitrile: <4 ppm
Fatty acids: <1 %
Fatty alkyl nitriles: <1 %

- Lot/batch No.: S000904
- Expiration date of the lot/batch: 2010-09-30
- Storage condition of test material: at RT
- pH: basic
- Colour: Max 3 Gardner
- Product name: Duomeen 1214D
- Melting Point: 24-34°C

Test animals

Species:
rabbit
Strain:
other: New Zealand White HsdIf:NZW
Details on test animals and environmental conditions:
TEST ANIMALS
- Source: Harlan Winkelmann GmbH, Borchen, Germany
- Weight at study initiation: 2.1 to 2.2kg
- Housing: in ABS - plastic rabbit cages, floor 4200cm²
- Diet (e.g. ad libitum): free access to Altromin 2123 maintenance diets for rabbits, rich in crude fibre
- Water (e.g. ad libitum): free access to tap water (microbiologically controlled periodically)
- Acclimation period: at least 5 days


ENVIRONMENTAL CONDITIONS
- Temperature (°C): 18 +- 3°C
- Humidity (%): 55 +- 10%
- Air changes (per hr): at least 10x/h
- Photoperiod (hrs dark / hrs light): 12/12

Test system

Type of coverage:
other: Initial test: semiocclusive, additional test: held in place manually
Preparation of test site:
other: clipping
Vehicle:
unchanged (no vehicle)
Controls:
other: untreated skin areas of the test animal served as control
Amount / concentration applied:
TEST MATERIAL
- Amount(s) applied (volume or weight with unit): for the initial test and the additional test 0.5mL

Duration of treatment / exposure:
initial test: 4h

additional test: 3min
Observation period:
1, 24, 48, 72h after patch removal
Number of animals:
2 (1 animal/ initial test, 1 animal/ additional test)
Details on study design:
TEST SITE
- Area of exposure: dorsal area of the trunk
- % coverage: small area of approximately 6cm²

REMOVAL OF TEST SUBSTANCE - INITIAL TEST
- Washing : rinsed by using tap water
- Time after start of exposure: at the end of the exposure period (4h)

EMOVAL OF TEST SUBSTANCE - ADDITIONAL TEST
- Washing : no
- Time after start of exposure: 3min after start of exposure the patch was removed without washing

SCORING SYSTEM:
according to guideline

Results and discussion

In vivo

Resultsopen allclose all
Irritation parameter:
other: PSI, initial test
Basis:
animal #1
Time point:
other: average over 24/48/72h
Score:
8
Max. score:
4
Reversibility:
not reversible
Remarks:
animal was euthanized after 72h due to animal welfare reasons
Remarks on result:
other: Necrosis was observed at all times
Irritation parameter:
other: PSI, additional test
Basis:
animal #2
Time point:
other: average over 24/48/72h
Score:
7.7
Max. score:
4
Reversibility:
not reversible
Remarks:
animal was euthanized after 72h due to animal welfare reasons
Remarks on result:
other: Necrosis was observed at all times
Irritation parameter:
other: result after 3 min, additional test, PSI
Basis:
animal #2
Time point:
other: 3 min
Score:
1
Max. score:
1
Reversibility:
not reversible
Remarks:
within 72h
Remarks on result:
other: Erythema formation was observed immediatly
Irritant / corrosive response data:
Dermal irritation was scored and recorded according to the grades stated in the guidelines. The test item showed severly irritant effects on the intact skin of both rabbits after a contact time of 4h or 3min.
Other effects:
Necrosis was observed, refer to Table 1.
No weight loss was observed during the observation period.

Any other information on results incl. tables

Table 1: Dermal irritation of animal 1 and 2

3 min

1 h

24 h

48 h

72 h

 Animal number

Erythema

Oedema

 Erythema

 Oedema

 Erythema

 Oedema

 Erythema

 Oedema

 Erythema

 Oedema

 1

initial test

-

-

  4*

4*

4

4*

4

  4*

 2 additional test

1

0

 1

2

4*

3

4*

 4*

* : necrosis covering the entire area

Applicant's summary and conclusion

Interpretation of results:
Category 1B (corrosive) based on GHS criteria
Remarks:
Migrated information
Conclusions:
According to the criteria of the Commission Directive 2001/59/EC, the test item N-C12,14 alkyl-1,3-diaminopropane has to be classified and has obligatory labelling requirement for skin irritation.
Executive summary:

Acute dermal irritation/corrosion of N-C12,14 alkyl-1,3-diaminopropane (liquid/paste) was investigated. 0.5 mL of the test substance were applied via a semiocclusive gauze patch to intact clipped skin of one female New Zealand White rabbit and held in place for 4 h. At the end of the exposure period, residual test item was rinsed with tap water. In an additional test 0.5mL were applied via a gauze patch to intact clipped skin of another female New Zealand White rabbit and held in place manually for only 3min without subsequent rinsing. Animals were examined for signs of erythema and oedema at 1, 24, 48, 72h after patch removal. .

Calculation of Primary Irritation Scores (PIS) as an average value over 24h, 48h and 72h was calculated for each animal. This yielded values of 8 for the animal in the inital test and 7.7 for the animal in the additional test. Necrosis was observed after 4h in animal 1 and after 24h in animal 2. Irritant effects were not reversible and occurred as early as 3min after exposure (additional test) and persisted. The symptoms after a contact period of both 4h or 3min required euthanisation of the animals due to animal welfare reasons shortly after the end of the 72h observation period.

Considering the reported data of this irritation study it can be stated that the test item N-C12,14 alkyl-1,3-diaminopropane showed severely irritant effects. According to the EC criteria for classification and labelling requirements for dangerous substances and preparations (Guidelines in Commission Directive 2001/59/EC) the test item N-C12,14 alkyl-1,3-diaminopropane has to be classified as corrosive category 1B, with hazard phrase H 314: Causes severe skin burns and eye damage.

The test on acute dermal irritation/corrosion was performed under GLP and similar to guideline OECD Guideline 404, EU Method B.4 and EPA OPPTS 870.2500 without deviations.