Sodium sulphamidate

Endpoint summary

Description of key information

Acute oral toxicity: The acute oral median lethal dose (LD50) of the test item in the female Wistar strain rat was estimated to be greater than 2500 mg/kg bodyweight 
Acute dermal toxicity: The acute dermal median lethal dose (LD50) of the test item in the Wistar strain rat was found to be greater than 2000 mg/kg bodyweight.

Key value for chemical safety assessment

Acute toxicity: via oral route

Endpoint conclusion

Dose descriptor:

LD50

Value:

2 500 mg/kg bw

Acute toxicity: via dermal route

Endpoint conclusion

Dose descriptor:

LD50

Value:

2 000 mg/kg bw

Additional information

Acute Oral Toxicity.

Introduction.

The study was performed to assess the acute oral toxicity of the test item following a single oral administration in the Wistar strain rat. The method was designed to be compatible with the following:

- OECD Guidelines for the Testing of Chemicals No. 423 “Acute Oral Toxicity – Acute Toxic Class Method” (adopted 17 December 2001)

- Method B1 tris Acute Toxicity (Oral) of Commission Regulation (EC) No. 440/2008

- United States Environmental Protection Agency Health Effects Test Guidelines OPPTS 870.1100 Acute Oral Toxicity, 2002

- Japanese Ministry of Agriculture, Forestry and Fisheries (JMAFF), 2000

Method. 

A group of three fasted females was treated with the test item at a dose level of 300 mg/kg bodyweight. Based on the results from this dose level further groups of fasted females were treated at a dose level of 2000 mg/kg bodyweight. Dosing was performed sequentially.

The test item was administered orally as asolution in distilled water. Clinical signs and bodyweight development were monitored during the study. All animals were subjected to gross necropsy.

Mortality. 

There were no deaths.

Clinical Observations. 

There were no signs of systemic toxicity.

Bodyweight. 

All animals showed expected gains in bodyweight over the study period.

Necropsy. 

No abnormalities were noted at necropsy.

Conclusion. 

The acute oral median lethal dose (LD₅₀) of the test item in the female Wistar strain rat was estimated to be greater than 2500 mg/kg bodyweight.

Acute Dermal Toxicity

Introduction. 

The study was performed to assess the acute dermal toxicity of the test item in the Wistar strain rat. The method was designed to be compatible with the following:

-      OECD Guidelines for the Testing of Chemicals No. 402 “Acute Dermal Toxicity” (adopted 24 February 1987)

-      Method B3 Acute Toxicity (Dermal) of CommissionRegulation (EC) No. 440/2008

- United States Environmental Protection Agency Health Effects Tesat Guidelines OPPTS 870.1200 Acute Dermal Toxicity August 1998

- Japanese Ministry of Agriculture, Forestry and Fisheries (MAFF), Testing Guidelines for Toxicology Studies, 12 NohSan No. 8147, amended 26 June 2001

- Japanese Ministry of Health and Welfare, 1992

Method. 

A group of ten animals (five males and five females) was given a single, 24 hour, semi‑occluded dermal application of the test item to intact skin at a dose level of 2000 mg/kg bodyweight. Clinical signs and bodyweight development were monitored during the study. All animals were subjected to gross necropsy.

Mortality. 

There were no deaths.

Clinical Observations. 

There were no signs of systemic toxicity.

Dermal Irritation. 

There were no signs of dermal irritation.

Bodyweight. 

Animals showed expected gains in bodyweight over the study period, except for three females which showed bodyweight loss during the first week but expected gain in bodyweight during the second week.

Necropsy. 

No abnormalities were noted at necropsy.

Conclusion. 

The acute dermal median lethal dose (LD₅₀) of the test item in the Wistar strain rat was found to be greater than 2000 mg/kg bodyweight.

Acute Inhalation Toxicity:

Inhalation is not considered a significant route of exposure and a study has therefore not been conducted.

Justification for classification or non-classification

The substance does not meet the criteria for classification for acute toxicity via the oral or dermal results based on the results of an acute oral toxicity study and an acute dermal toxicity study, which gave LD₅₀ results of >2500 mg/kg bodyweight and >2000 mg/kg bodyweight respectively.