Sodium hydroxymethanesulphinate

Skin irritation / corrosion

Administrative data

Endpoint:

skin irritation: in vivo

Type of information:

experimental study

Adequacy of study:

key study

Study period:

November 2008 - February 2009

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: GLP-guideline study; the test was conducted on the basis of the official method as defined in the O.E.C.D. guideline N° 402 dated February 24th, 1987 and the test method B.3 of the Council regulation No 440/2008 of 30 May 2008.

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2009

Report date:

2009

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

other: OECD guideline 402 (Acute Dermal Toxicity)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Test material

Test material information

Constituent 1

Reference substance name:

Sodium hydroxymethanesulphinate

EC Number:

205-739-4

EC Name:

Sodium hydroxymethanesulphinate

Cas Number:

149-44-0

Molecular formula:

CH4O3S.Na

IUPAC Name:

sodium hydroxymethanesulphinate

Test animals

Species:

rat

Strain:

Sprague-Dawley

Details on test animals or test system and environmental conditions:

TEST ANIMALS
- Source: Elevage JANVIER (53940 Le Genest St Isle - France)
- Age at study initiation: 6 weeks (males), 8 weeks (females)
- Weight at study initiation: 217-244 g (males); 201-226g (females)
- Fasting period before study: not reported
- Housing: During the treatment, the animals were kept in individual cage. At 03, the animals were put into their cage by 2 or 3. The rats were kept in solid-bottomed clear polycarbonate cages with a stainless steel mesh lid. Each cage contains sawdust bedding which was changed at least 2 times a week. Each cage was installed in conventional air conditioned animal husbandry.
- Diet (e.g. ad libitum): M20-rat/mouse maintenance (Special diets services)
- Water (e.g. ad libitum): tap-water from public distribution system
- Acclimation period: at least 5 days

ENVIRONMENTAL CONDITIONS
- Temperature (°C): 19 to 25°C
- Humidity (%): 30 to 70%,
- Air changes (per hr): approx. 15 changes per hour
- Photoperiod (hrs dark / hrs light): 12 hours continuous light (7.00 a.m.- 19.00 p.m.)

Test system

Type of coverage:

occlusive

Preparation of test site:

not specified

Vehicle:

other: distilled water

Controls:

yes

Amount / concentration applied:

Topical application, under porous gauze dressing, an effective dose of 2,000 mg/kg body weight of the test substance water and administered under a volume of 5 mL/kg body weight, during 24 h.

Duration of treatment / exposure:

24 h

Observation period:

14 d

Number of animals:

5 males
5 females

Details on study design:

- Duration of observation period following administration: 14 d
- Frequency of observations and weighing:
1. Daily examination: Systematic examinations were carried out to identify any behavioural or toxic effects on the major physiological functions 14 days after administration of the test solution. This examination focuses particularly on a list of symptoms, recorded as "present" or "absent" on the
observation sheet. These observations were compared to control data. Observations and a mortality report were then carried out every day for 14 days.
2. Periodical examinations: The animals were weighed on day D0 (just before administering the test item) then on D2, D7, and
Dl4. Weight changes were calculated and recorded.
- Necropsy of survivors performed: yes. Examination at the end of the test: On D 14, the animals were anaesthetized with sodium pentobarbital and administration continued to fatal levels. Maeroscopie observations were entered on individual autopsy sheets. Only those organs likely to be modified in cases of acute toxicity were examined. Those presenting macroscopic anomalies can be removed and preserved in view to microscopic examinations.
- Necropsy of survivors performed: yes

Results and discussion

In vivo

Results

Remarks on result:

other: No irritation of skin observed in acute toxicity test dermal

Irritant / corrosive response data:

Neither cutaneous reactions nor systemic clinical signs related to the administration of the test item were observed.

Other effects:

none

Applicant's summary and conclusion

Interpretation of results:

not irritating

Remarks:

Migrated information Criteria used for interpretation of results: EU

Conclusions:

Not irritaing to skin

Executive summary:

The test item was applied onto the intact skin of 10 Sprague Dawley rats (5 males and 5 females) at the single dose of 2,000 mg/kg body weight.

No mortality occurred during the study. Neither cutaneous reactions nor systemic clinical signs related to the administration of the test item were observed.

The body weight evolution of the animals remained normal throughout the study, similar between treated and control animals. The macroscopical examination of the animals at the end of the study did not reveal treatment related changes.