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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
Study period:
21.02.1979 to 27.06.1979
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1979
Report date:
1979

Materials and methods

Test guideline
Qualifier:
no guideline followed
Principles of method if other than guideline:
This study was conducted before OECD TG 406 was available. It was conducted according to the Magnusson and Kligman guinea pig maximisation test.
GLP compliance:
no
Type of study:
guinea pig maximisation test
Justification for non-LLNA method:
An LLNA study was not performed because there is an existing reliable study for skin sensitisation using the Guinea Pig Maximisation test method, which pre-dates REACH Regulation (EC No 1907/2006) and CLP Regulation (EC No 1272/2008).

Test material

Constituent 1
Chemical structure
Reference substance name:
[[(phosphonomethyl)imino]bis[ethane-2,1-diylnitrilobis(methylene)]]tetrakisphosphonic acid
EC Number:
239-931-4
EC Name:
[[(phosphonomethyl)imino]bis[ethane-2,1-diylnitrilobis(methylene)]]tetrakisphosphonic acid
Cas Number:
15827-60-8
Molecular formula:
C9H28N3O15P5
IUPAC Name:
{[bis({2-[bis(phosphonomethyl)amino]ethyl})amino]methyl}phosphonic acid
Test material form:
not specified

In vivo test system

Test animals

Species:
guinea pig
Strain:
not specified
Sex:
not specified

Study design: in vivo (non-LLNA)

Induction
Route:
intradermal and epicutaneous
Vehicle:
physiological saline
Concentration / amount:
Induction (intradermal injection): 1%
Induction (epicutaneous patch): 10%
Challenge 1: 2.5%
Challenge 2: 2.5%
Challenge
No.:
#1
Route:
epicutaneous, occlusive
Vehicle:
physiological saline
Concentration / amount:
Induction (intradermal injection): 1%
Induction (epicutaneous patch): 10%
Challenge 1: 2.5%
Challenge 2: 2.5%
No. of animals per dose:
Ten per challenge phase

Results and discussion

In vivo (non-LLNA)

Resultsopen allclose all
Key result
Reading:
1st reading
Hours after challenge:
24
Group:
test chemical
Dose level:
2.5%
No. with + reactions:
0
Total no. in group:
10
Remarks on result:
no indication of skin sensitisation
Key result
Reading:
2nd reading
Hours after challenge:
48
Group:
test chemical
Dose level:
2.5%
No. with + reactions:
0
Total no. in group:
10
Remarks on result:
no indication of skin sensitisation
Reading:
1st reading
Hours after challenge:
24
Group:
negative control
Dose level:
2.5%
No. with + reactions:
0
Total no. in group:
4
Remarks on result:
no indication of skin sensitisation
Reading:
1st reading
Hours after challenge:
24
Group:
negative control
Dose level:
0%
No. with + reactions:
0
Total no. in group:
4
Remarks on result:
no indication of skin sensitisation
Reading:
1st reading
Hours after challenge:
48
Group:
negative control
Dose level:
2.5%
No. with + reactions:
0
Total no. in group:
4
Remarks on result:
no indication of skin sensitisation
Reading:
1st reading
Hours after challenge:
48
Group:
negative control
Dose level:
0%
No. with + reactions:
0
Total no. in group:
4
Remarks on result:
no indication of skin sensitisation
Key result
Reading:
2nd reading
Hours after challenge:
24
Group:
test chemical
Dose level:
2.5%
No. with + reactions:
0
Total no. in group:
10
Remarks on result:
no indication of skin sensitisation
Reading:
2nd reading
Hours after challenge:
24
Group:
negative control
Dose level:
0%
No. with + reactions:
0
Total no. in group:
4
Remarks on result:
no indication of skin sensitisation
Reading:
2nd reading
Hours after challenge:
48
Group:
negative control
Dose level:
0%
No. with + reactions:
0
Total no. in group:
4
Remarks on result:
no indication of skin sensitisation
Reading:
1st reading
Hours after challenge:
24
Group:
positive control
Remarks on result:
other: There is no information about positive control.

Any other information on results incl. tables

All animals gained weight during the study.

Applicant's summary and conclusion

Interpretation of results:
GHS criteria not met
Conclusions:
In a guinea pig maximisation study conducted before OECD TG 406 and GLP (reliability score 2), DTPMP was not sensitising to the skin of guinea-pigs.