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Diss Factsheets

Administrative data

Description of key information

There are no in vitro or in vivo data on skin and eye irritation for HEDP-xK, therefore good quality data are read-across from the category member HEDP (2-3Na).

In a translation of a German report for the key skin irritation study (reliability score 2), conducted using a protocol similar to OECD Test Guideline 404 and unknown if in compliance with GLP, HEDP (2-3Na) was not irritating to intact skin, and was mildly irritating to scarified rabbit skin (Korn, 1987).

 

In a German summary translation of the key eye irritation study (reliability score 2), conducted using a protocol similar to OECD Test Guideline 405 not specified if in compliance with GLP, HEDP (2-3Na) was not irritating to rabbit eyes (Korn, 1987).

No data is available for respiratory irritation.

Key value for chemical safety assessment

Skin irritation / corrosion

Link to relevant study records
Reference
Endpoint:
skin irritation: in vivo
Type of information:
experimental study
Adequacy of study:
key study
Study period:
November and December 1986
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
comparable to guideline study with acceptable restrictions
Remarks:
No information on GLP status
Reason / purpose for cross-reference:
read-across: supporting information
Qualifier:
equivalent or similar to guideline
Guideline:
OECD Guideline 404 (Acute Dermal Irritation / Corrosion)
GLP compliance:
not specified
Species:
rabbit
Strain:
Californian
Details on test animals or test system and environmental conditions:
TEST ANIMALS
- Source: Manfred Berger, Langburkersdorf
- Age at study initiation: No data
- Weight at study initiation: Average 3090 g
- Housing: Individually in boxes with hard bottoms.
- Diet: 80 g per day
- Water: 200 mL per day
- Acclimation period: Two weeks


ENVIRONMENTAL CONDITIONS
- Temperature (°C): 18-24 °C
- Humidity (%): 40-70 %
- Air changes (per hr): No data
- Photoperiod (hrs dark / hrs light): No data


IN-LIFE DATES: November and December 1986
Type of coverage:
occlusive
Preparation of test site:
other: intact and scarified skin exposed
Vehicle:
unchanged (no vehicle)
Controls:
not required
Amount / concentration applied:
TEST MATERIAL
- Amount(s) applied (volume or weight with unit): 0.5 mL
- Concentration: 35% active substance
Duration of treatment / exposure:
Four hours
Observation period:
14 days
Number of animals:
Six
Details on study design:
TEST SITE
- Area of exposure: Flank
- % coverage: No data (shaved/scarified area of 2.5 x 2.5 cm)
- Type of wrap if used: Aluminium foil and elastic tapes

REMOVAL OF TEST SUBSTANCE
- Washing: Not done

SCORING SYSTEM: Draize

After each application, clinical observations and evaluations of each exposed skin area of each rabbit were made: one hour after removal of the substance as well as on 1, 2, 3, 6, 8, 10 and 13 days after application.
Both exposed intact and scarified skin areas were examined and evaluated. The untreated areas represented the respective control areas.
Irritation parameter:
overall irritation score
Basis:
mean
Time point:
other: 24, 48 and 72 hours
Score:
0
Max. score:
8
Remarks on result:
other: Intact skin
Irritation parameter:
erythema score
Basis:
animal #1
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
no indication of irritation
Irritation parameter:
erythema score
Basis:
animal #2
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
no indication of irritation
Irritation parameter:
erythema score
Basis:
animal #3
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
no indication of irritation
Irritation parameter:
erythema score
Basis:
animal #4
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
no indication of irritation
Irritation parameter:
erythema score
Basis:
animal #5
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
no indication of irritation
Irritation parameter:
erythema score
Basis:
animal #6
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
no indication of irritation
Irritation parameter:
edema score
Basis:
animal #1
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
no indication of irritation
Irritation parameter:
edema score
Basis:
animal #2
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
no indication of irritation
Irritation parameter:
edema score
Basis:
animal #3
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
no indication of irritation
Irritation parameter:
edema score
Basis:
animal #4
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
no indication of irritation
Irritation parameter:
edema score
Basis:
animal #5
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
no indication of irritation
Irritation parameter:
edema score
Basis:
animal #6
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
no indication of irritation
Irritant / corrosive response data:
The intact skin showed no signs of skin irritation. On the scarified (slightly pre-damaged) skin, slight to moderate erythema with slight oedema were recognised. Those irritations disappeared completely by day 10. The calculated skin irritation index at one hour was 1.17, and 2.5 for the scarified skin, indicating the substance would be rated as slightly irritant. However, no skin irritation was observed in intact skin in any of the animals.
Other effects:
None reported.

Table 1 Summary of irritation results over the 14 day observation period.

Hour / day post application

Intact skin area (maximum 8 points)

Scarified skin area (maximum 8 points)

Skin irritation index (maximum 8 points)

1 hour

0

2.50

1.17

1 day

0

1.67

0.83

2

0

1.67

0.83

3

0

1.00

0.50

6

0

0.50

0.25

8

0

0.17

0.08

10

0

0

0

13

0

0

0

Interpretation of results:
GHS criteria not met
Conclusions:
In a translation of a German report on a skin irritation study (reliability score 2), conducted using a protocol similar to OECD Test Guideline 404 and unknown if in compliance with GLP, the HEDP (2-3Na) was not irritating to intact skin, and was mildly irritating to scarified rabbit skin.
Endpoint conclusion
Endpoint conclusion:
no adverse effect observed (not irritating)

Eye irritation

Link to relevant study records
Reference
Endpoint:
eye irritation: in vivo
Type of information:
experimental study
Adequacy of study:
key study
Study period:
January and February 1987
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
comparable to guideline study with acceptable restrictions
Remarks:
No information on GLP status
Reason / purpose for cross-reference:
read-across: supporting information
Qualifier:
equivalent or similar to guideline
Guideline:
OECD Guideline 405 (Acute Eye Irritation / Corrosion)
GLP compliance:
not specified
Species:
rabbit
Strain:
Californian
Details on test animals or tissues and environmental conditions:
TEST ANIMALS
- Source: Manfred Berger, Langburkersdorf
- Age at study initiation: No data
- Weight at study initiation: Average 3292 g
- Housing: Individually in boxes with hard bottoms
- Diet: 80 g
- Water: Ad libitum
- Acclimation period: Two weeks

ENVIRONMENTAL CONDITIONS
- Temperature (°C): 18-24 °C
- Humidity (%): 40-70 %
- Air changes (per hr): No data
- Photoperiod (hrs dark / hrs light): No data


IN-LIFE DATES: January and February 1987
Vehicle:
unchanged (no vehicle)
Controls:
not required
Amount / concentration applied:
TEST MATERIAL
- Amount(s) applied (volume or weight with unit): 0.1 mL
- Concentration: 35% active substance
Duration of treatment / exposure:
Eyes not rinsed.
Observation period (in vivo):
Four days.
Number of animals or in vitro replicates:
Six
Details on study design:
After each substance application, clinical observations and evaluations of each exposed eye were carried out after the following periods (controls were the untreated eyes): one hour, 1, 2, 3, 4 days post-instillation. The clinical observation and evaluation was finished on the 2nd day as no irritation or corrosion could be detected. The cornea was examined for a possible haze (degree of haze and size of the hazed area), the iris for macroscopically visible deviations as well as light response and finally the conjunctiva for inflammatory processes.

REMOVAL OF TEST SUBSTANCE
- Washing: Not done

SCORING SYSTEM: Draize

TOOL USED TO ASSESS SCORE: No data
Irritation parameter:
overall irritation score
Basis:
mean
Time point:
other: 1 hour
Score:
2
Max. score:
110
Reversibility:
fully reversible within: 48 hours
Remarks on result:
other: conjunctival effects only.
Irritation parameter:
overall irritation score
Basis:
mean
Time point:
24 h
Score:
0.33
Max. score:
110
Reversibility:
fully reversible
Irritation parameter:
cornea opacity score
Basis:
animal #1
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
no indication of irritation
Irritation parameter:
cornea opacity score
Basis:
animal #2
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
no indication of irritation
Irritation parameter:
cornea opacity score
Basis:
animal #3
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
no indication of irritation
Irritation parameter:
cornea opacity score
Basis:
animal #4
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
no indication of irritation
Irritation parameter:
cornea opacity score
Basis:
animal #5
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
no indication of irritation
Irritation parameter:
cornea opacity score
Basis:
animal #6
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
no indication of irritation
Irritation parameter:
iris score
Basis:
animal #1
Time point:
24/48/72 h
Score:
0
Max. score:
2
Remarks on result:
no indication of irritation
Irritation parameter:
iris score
Basis:
animal #2
Time point:
24/48/72 h
Score:
0
Max. score:
2
Remarks on result:
no indication of irritation
Irritation parameter:
iris score
Basis:
animal #3
Time point:
24/48/72 h
Score:
0
Max. score:
2
Remarks on result:
no indication of irritation
Irritation parameter:
iris score
Basis:
animal #4
Time point:
24/48/72 h
Score:
0
Max. score:
2
Remarks on result:
no indication of irritation
Irritation parameter:
iris score
Basis:
animal #5
Time point:
24/48/72 h
Score:
0
Max. score:
2
Remarks on result:
no indication of irritation
Irritation parameter:
iris score
Basis:
animal #6
Time point:
24/48/72 h
Score:
0
Max. score:
2
Remarks on result:
no indication of irritation
Irritation parameter:
conjunctivae score
Basis:
animal #1
Time point:
24/48/72 h
Score:
0.33
Max. score:
3
Reversibility:
fully reversible within: one day
Remarks on result:
no indication of irritation
Irritation parameter:
conjunctivae score
Basis:
animal #2
Time point:
24/48/72 h
Score:
0
Max. score:
3
Remarks on result:
no indication of irritation
Irritation parameter:
conjunctivae score
Basis:
animal #3
Time point:
24/48/72 h
Score:
0
Max. score:
3
Remarks on result:
no indication of irritation
Irritation parameter:
conjunctivae score
Basis:
animal #4
Time point:
24/48/72 h
Score:
0
Max. score:
3
Remarks on result:
no indication of irritation
Irritation parameter:
conjunctivae score
Basis:
animal #5
Time point:
24/48/72 h
Score:
0
Max. score:
3
Remarks on result:
no indication of irritation
Irritation parameter:
conjunctivae score
Basis:
animal #6
Time point:
24/48/72 h
Score:
0
Max. score:
3
Remarks on result:
no indication of irritation
Irritation parameter:
chemosis score
Basis:
animal #1
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
no indication of irritation
Irritation parameter:
chemosis score
Basis:
animal #2
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
no indication of irritation
Irritation parameter:
chemosis score
Basis:
animal #3
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
no indication of irritation
Irritation parameter:
chemosis score
Basis:
animal #4
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
no indication of irritation
Irritation parameter:
chemosis score
Basis:
animal #5
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
no indication of irritation
Irritation parameter:
chemosis score
Basis:
animal #6
Time point:
24/48/72 h
Score:
0
Max. score:
4
Remarks on result:
no indication of irritation
Irritant / corrosive response data:
After instillation of 0.1 mL of the technical product into one conjunctival sack of the rabbit a formation of weak redness of the conjunctiva could be observed only till day 1 post-instillation. The maximum score of “eye irritation points” was 2.0.
Other effects:
None reported.

Table 1 Summary of irritation results.

Hour / day post-exposure

Cornea

(maximum 80 points)

Iris

(maximum 10 points)

Conjunctiva (maximum 20 points)

Eye irritation points (maximum 110 points)

1 hour

0

0

2.00

2.00

1 day

0

0

0.33

0.33

2 day

0

0

0

0

3 day

0

0

0

0

4 day

0

0

0

0

Interpretation of results:
GHS criteria not met
Conclusions:
In a German summary translation of an eye irritation study (reliability score 2), conducted using a protocol similar to OECD Test Guideline 405 not specified if in compliance with GLP, HEDP (2-3Na) was not irritating to rabbit eyes.
Endpoint conclusion
Endpoint conclusion:
no adverse effect observed (not irritating)

Respiratory irritation

Endpoint conclusion
Endpoint conclusion:
no study available

Additional information

In a translation of a German report for the key skin irritation study (reliability score 2), conducted using a protocol similar to OECD Test Guideline 404 and unknown if in compliance with GLP, HEDP (2-3Na) was applied to intact and scarified skin respectively of six Californian rabbits for four hours. The dose was 0.5 mL of a 25% active substance and any skin reactions were scored up to 13 days after the application. The intact skin showed no signs of skin irritation. On the scarified (slightly pre-damaged) skin, slight to moderate erythema with slight oedema were recognised, however, had disappeared completely by day 10. It is concluded that HEDP (2-3Na) was not irritating to intact skin and mildly irritating to scarified rabbit skin (Korn, 1987).

In a supporting skin irritation study (reliability score 2), conducted prior to the adoption of OECD Test Guidelines and pre-GLP, HEDP (2 -3Na) was not irritating to rabbit skin (Younger Laboratories, 1971).

In a supporting skin irritation study (reliability score 1), conducted according to OECD Test Guideline 404 and in compliance with GLP, a single dose of HEDP-4Na was applied to intact skin of three New Zealand rabbits under semi-occluded application for four hours. The rabbits were evaluated for erythema and oedema formation at 24, 48 and 72 hours. It was concluded that sodium salt of HEDP is not irritating to the skin of rabbits (SafePharm Laboratories, 1995).

 

In a supporting well conducted skin irritation study (reliability score 1), conducted in a similar protocol to OECD Test Guideline 404 and pre-GLP, 0.5 mL of HEDP-4Na did not meet the criteria to be a skin irritant (BioDynamics Inc., 1985).

In a German summary translation of the key eye irritation study (reliability score 2), conducted using a protocol similar to OECD Test Guideline 405 and not specified if in compliance with GLP, 0.1 mL of a 35% active substance of HEDP (2-3Na) was applied to the eye of six Californian rabbits. The eyes were not rinsed prior to the treatment. Clinical observations and evaluations of each exposed eye were performed, however, as no irritation or corrosion could be detected by day 2, the evaluations stopped earlier. It was concluded that HEDP (2-3Na) is not irritating to rabbit eyes (Korn, 1987).

In a supporting eye irritation study (reliability score 2), conducted to a protocol similar to OECD Test Guideline 405 but pre-GLP, it was concluded that HEDP (2-3Na) was not irritating to the eyes of rabbits (Henkel, 1984). While this study was conducted on the registered substance, the limitations of it meant that an alternative study was selected as the key study. The result from this study support the overall conclusion that the registered substance is not irritating to eyes.

In a supporting eye irritation study (reliability score 1), conducted to OECD Test Guideline 405 and in compliance with GLP, 0.1 mL of HEDP-4Na was applied to the eye of one New Zealand White rabbit. Following observation of the ocular response, two additional animals were tested. It was concluded that sodium salt of HEDP is not irritating to the eyes of rabbits (SafePharm Laboratories, 1995).

In a well conducted supporting eye irritation study (reliability score 1), conducted using a protocol comparable to OECD Test Guideline 405 but pre-GLP, it was concluded that HEDP-4Na is mildly irritating to the eyes (BioDynamics Inc., 1985).

See read-across justification in IUCLID Section 13.

Justification for classification or non-classification

Based on the available read-across data for HEDP sodium salts and pH range of 6-8 for the registered substance HEDP-xK, no classification is required for potassium salts of HEDP for skin and eye irritation according to Regulation (EC) No 1272/2008.