[[(phosphonomethyl)imino]bis[ethylenenitrilobis(methylene)]]tetrakisphosphonic acid, potassium salt

Acute Toxicity: oral

Administrative data

Endpoint:

acute toxicity: oral

Type of information:

migrated information: read-across from supporting substance (structural analogue or surrogate)

Adequacy of study:

key study

Study period:

11 July 2001 - 30 July 2001

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: The study was conducted according to the appropriate OECD guideline and it was compliant with GLP. The study is read across from the calcium sodium salt of DTPMP (CAS 52871-36-0).

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2001

Report date:

2001

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

EPA OPPTS 870.1100 (Acute Oral Toxicity)

GLP compliance:

yes (incl. QA statement)

Test type:

fixed dose procedure

Limit test:

yes

Test material

Test material information

Constituent 1

Reference substance name:

52871-36-0

Cas Number:

52871-36-0

IUPAC Name:

52871-36-0

Constituent 2

Reference substance name:

DTPMP Ca Na

IUPAC Name:

DTPMP Ca Na

Details on test material:

- Name of test material (as cited in study report): SPE 9806

- Physical state: amber liquid

- Storage condition of test material: room temperature in the dark

Test animals

Species:

rat

Strain:

Sprague-Dawley

Sex:

male/female

Details on test animals or test system and environmental conditions:

TEST ANIMALS
- Source: Charles River (UK) Ltd., Margate, Kent, UK
- Age at study initiation: ca 8 weeks
- Weight at study initiation: minimum of 200 g
- Fasting period before study: overnight and for ca. 3 hours after dosing
- Housing: individually housed in suspended metal cages
- Diet: ad libitum
- Water: ad libitum
- Acclimation period: minimum of five days

ENVIRONMENTAL CONDITIONS
- Temperature (°C): 19 to 25
- Humidity (%): 30 - 70
- Air changes (per hr): minimum 15
- Photoperiod (hrs dark / hrs light): 12/12

Administration / exposure

Route of administration:

oral: gavage

Vehicle:

unchanged (no vehicle)

Details on oral exposure:

MAXIMUM DOSE VOLUME APPLIED: 1.61 ml/kg

Doses:

2000 mg/kg

No. of animals per sex per dose:

5M, 5F

Control animals:

no

Details on study design:

- Duration of observation period following administration: 14 days

- Frequency of observations and weighing: The animals were observed for deaths or overt signs of toxicity 0.5, 1, 2 and 4 hours after dosing and subsequently once daily. Individual body weights were recorded prior to dosing on day 0 and on days 7 and 14.

- Necropsy of survivors performed: yes

- Other examinations performed: clinical signs, body weight,organ weights, histopathology, other: The gross pathological examination consisted of an external examination and opening of the abdominal and thoracic cavities. The appearances of any macroscopic abnormalities were recorded. No tissues were retained.

Results and discussion

Preliminary study:

A range finding study was performed with 2000 mg/kg dose at 1.61 ml/kg dose volume, using 1 male and 1 female animal. The animals were observed for deaths or overt signs of toxicity 0.5, 1, 2and 4 hours after dosing and subsequently once daily for 5 days. No necropsies were performed. Based on the results of the range finding study a further group of animals was treated.

Effect levels

Sex:

male/female

Dose descriptor:

LD50

Effect level:

> 2 000 mg/kg bw

Based on:

test mat.

Mortality:

There were no deaths.

Clinical signs:

other: There were no signs of systemic toxicity.

Gross pathology:

No abnormalities were noted at necropsy.

Other findings:

None reported.

Applicant's summary and conclusion

Interpretation of results:

study cannot be used for classification

Remarks:

Migrated information

Conclusions:

An acute oral toxicity LD50 value of >2000 mg/kg is reported in a guideline study which us conducted in compliance with GLP. The result is read across from the calcium/sodium salt of DTPMP (CAS 52871-36-0).