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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:
27.07.1982 to 30.07.1982
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1982
Report date:
1982

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 404 (Acute Dermal Irritation / Corrosion)
GLP compliance:
yes

Test material

Constituent 1
Chemical structure
Reference substance name:
octadecasodium ({[2-({2-[bis(hydrogen phosphonatomethyl)amino]ethyl}(hydrogen phosphonatomethyl)amino)ethyl](hydrogen phosphonatomethyl)amino}methyl)phosphonate {[(hydrogen phosphonatomethyl)({2-[(hydrogen phosphonatomethyl)({2-[(hydrogen phosphonatomethyl)(phosphonatomethyl)amino]ethyl})amino]ethyl})amino]methyl}phosphonate {[(hydrogen phosphonatomethyl)({2-[(hydrogen phosphonatomethyl)({2-[(hydrogen phosphonatomethyl)(phosphonomethyl)amino]ethyl})amino]ethyl})amino]methyl}phosphonate
EC Number:
701-216-4
Molecular formula:
DTPMP-5Na C9H23N3Na5O15P5 DTPMP-6Na C9H22N3Na6O15P5 DTPMP-7Na C9H21N3Na7O15P5
IUPAC Name:
octadecasodium ({[2-({2-[bis(hydrogen phosphonatomethyl)amino]ethyl}(hydrogen phosphonatomethyl)amino)ethyl](hydrogen phosphonatomethyl)amino}methyl)phosphonate {[(hydrogen phosphonatomethyl)({2-[(hydrogen phosphonatomethyl)({2-[(hydrogen phosphonatomethyl)(phosphonatomethyl)amino]ethyl})amino]ethyl})amino]methyl}phosphonate {[(hydrogen phosphonatomethyl)({2-[(hydrogen phosphonatomethyl)({2-[(hydrogen phosphonatomethyl)(phosphonomethyl)amino]ethyl})amino]ethyl})amino]methyl}phosphonate
Test material form:
solid - liquid: aqueous solution

Test animals

Species:
rabbit
Strain:
New Zealand White
Details on test animals or test system and environmental conditions:
Source: Hylyne Rabbits, Marston, Northwich, Cheshire, UK
Age: 12-16 weeks old
Weight at start of study: 2.83- 3.00 kg
Diet: Rabbit Diet, J. Waring (Feeds) Limited, ad libitum
Water: Tap water, ad libitum
Housing: Animals were individually housed in suspended metal cages
Environment
Temperature: 22±3°C
Air exchanges: Approximately 15 per hour
Photoperiod: 12 hours light: 12 hours dark
Humidity: 76-80%

Test system

Type of coverage:
occlusive
Preparation of test site:
shaved
Vehicle:
unchanged (no vehicle)
Remarks:
aqueous solution, administered undiluted.
Controls:
not required
Amount / concentration applied:
0.5 ml test substance (equivalent to 292 mg active salt) was applied to a 2.5 cm by 2.5 cm area. 
Duration of treatment / exposure:
4 hour(s)
Observation period:
72 hours
Number of animals:
Three
Details on study design:
Skin responses were evaluated 1, 24, 48 and 72 hours after removal of the patch and residual test substance.  Note: Fur removed only 4-16 hours prior to start of test (OECD guideline would require fur removal 24 hours prior to start of test).

Results and discussion

In vivo

Resultsopen allclose all
Irritation parameter:
primary dermal irritation index (PDII)
Basis:
mean
Time point:
other: 24, 48 and 72 hours
Score:
0
Max. score:
8
Remarks on result:
other: No signs of irritation observed in any animal.
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:
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
Irritant / corrosive response data:
No skin reactions were present in any of the animals at 1hr, 24hr, 48hr and 72hr following removal of the patch.
Other effects:
None

Applicant's summary and conclusion

Interpretation of results:
GHS criteria not met
Conclusions:
In the in vivo skin irritation study with DTPMP (5-7Na), conducted according to OECD Test Guideline 404 and in compliance with GLP, DTPMP (5-7Na) was concluded to be not irritating to the skin of rabbits.