Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Toxicological information

Acute Toxicity: dermal

Currently viewing:

Administrative data

Endpoint:
acute toxicity: dermal
Type of information:
experimental study
Adequacy of study:
key study
Study period:
03.08.1982 to 17.08.1982
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
comparable to guideline study

Data source

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

Materials and methods

Test guideline
Qualifier:
equivalent or similar to guideline
Guideline:
OECD Guideline 402 (Acute Dermal Toxicity)
Principles of method if other than guideline:
Method: SafePharm protocol (number GM 08/82/53A)
GLP compliance:
yes
Test type:
standard acute method
Limit test:
yes

Test material

Constituent 1
Chemical structure
Reference substance name:
[nitrilotris(methylene)]trisphosphonic acid, sodium salt
EC Number:
243-900-0
EC Name:
[nitrilotris(methylene)]trisphosphonic acid, sodium salt
Cas Number:
20592-85-2
Molecular formula:
General formula C3H12NO9P3.xNa where x=3-5 ATMP-3Na C3H9NNa3O9P3 ATMP-4Na C3H8NNa4O9P3 ATMP-5Na C3H7NNa5O9P3
IUPAC Name:
Sodium salt of [nitrilotris(methylene)]trisphosphonic acid (3-5Na:1)
Test material form:
solid - liquid: aqueous solution
Remarks:
aqueous solution

Test animals

Species:
rat
Strain:
Sprague-Dawley
Sex:
male/female
Details on test animals or test system and environmental conditions:
TEST ANIMALS
- Source: A. Tuck & Sons Limited, Essex, UK.
- Age at study initiation: 6-8 weeks
- Weight at study initiation: Males: 219-242 g: Females: 210-232 g.
- Fasting period before study: None
- Housing: Five per polypropylene cage
- Diet (e.g. ad libitum): Ad libitum
- Water (e.g. ad libitum): Ad libitum
- Acclimation period: Minimum five days.


ENVIRONMENTAL CONDITIONS
- Temperature (°C): 22± 3
- Humidity (%): 65-75
- Air changes (per hr): approximately 15
- Photoperiod (hrs dark / hrs light): 12/12


IN-LIFE DATES: From: 03.08.1982 to 17.08.1982

Administration / exposure

Type of coverage:
occlusive
Vehicle:
unchanged (no vehicle)
Details on dermal exposure:
TEST SITE
- Area of exposure: Dorsal, lateral and ventral.
- % coverage: No data
- Type of wrap if used: The trunks of the rats were encircled with a strip of elastic adhesive bandage, backed with aluminium foil. The bandage was tightened sufficiently to prevent the animal from wriggling free and wrapped round to form a double layer.


REMOVAL OF TEST SUBSTANCE
- Washing (if done): yes
- Time after start of exposure: 24 hours


TEST MATERIAL
- Amount(s) applied (volume or weight with unit): 10 ml/kg
- Constant volume or concentration used: yes
Duration of exposure:
24 hours
Doses:
10 ml/kg
No. of animals per sex per dose:
5
Control animals:
no
Details on study design:
- Duration of observation period following administration: 14 days
- Frequency of observations and weighing: Animals were observed 0.5, 1, 2, 3, 4 and 5 hours following dosing. On subsequent days the animals were observed at least once. Body weights were recorded on days 0, 7 and 14.
- Necropsy of survivors performed: yes
- Other examinations performed: none
Statistics:
None required.

Results and discussion

Effect levels
Key result
Sex:
male/female
Dose descriptor:
LD50
Effect level:
> 10 mL/kg bw
Based on:
test mat.
Remarks on result:
other: equivalent to >5740 mg active salt/kg bw and >4437 mg active acid/kg bw
Mortality:
No animals died.
Clinical signs:
other: Lethargy and increased red coloured lacrimation in one rat on the day of dosing.
Gross pathology:
No abnormal findings.
Other findings:
None

Any other information on results incl. tables

The dermal LD50 in the rat was determined to be >10 ml/kg bw (reviewer comment: presumed equivalent to >5740 mg active
salt/kg bw).

Applicant's summary and conclusion

Interpretation of results:
GHS criteria not met
Conclusions:
In the acute dermal toxicity study, conducted according to a protocol similar to OECD Test Guideline 402 and in compliance with GLP, the LD50 for ATMP-xNa (aqueous solution containing 41% w/w active salt) was concluded to be >10 ml/kg (equivalent to 5740 mg active salt/kg bw and 4437 mg active acid/kg bw) in rats.