Dipotassium hexachloroplatinate

Endpoint summary

Description of key information

The acute oral LD50 of potassium hexachloroplatinate was determined to be 195 mg/kg bw in rats (Berthold, 1995a).

 

No relevant acute dermal or inhalation toxicity data were identified.

Key value for chemical safety assessment

Acute toxicity: via oral route

Link to relevant study records

Reference

Endpoint:

acute toxicity: oral

Type of information:

experimental study

Adequacy of study:

key study

Study period:

12 April 1995 - 8 November 1995

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Study carried out according to GLP and OECD guideline 401 (current at 1995).

Qualifier:

according to guideline

Guideline:

OECD Guideline 401 (Acute Oral Toxicity)

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method B.1 (Acute Toxicity (Oral))

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Test type:

standard acute method

Limit test:

no

Species:

rat

Strain:

other: Wistar-Unilever (HsdCpb:Wu)

Sex:

male/female

Details on test animals or test system and environmental conditions:

TEST ANIMALS
- Source: Harlan-Winkelmann GmbH, D-33176 Borchen
- Age at study initiation: Males 8-9 weeks; Females 9-10 weeks
- Weight at study initiation: Males 166-218 g; Females 140-170 g
- Fasting period before study: Approx. 16 hours before treatment
- Housing: Macrolon cages, type II
- Diet (e.g. ad libitum): Standard diet ad libitum
- Water (e.g. ad libitum): ad libitum
- Acclimation period: at least 5 days before administration

ENVIRONMENTAL CONDITIONS
- Temperature (°C): 21-22
- Humidity (%): 43-64
- Air changes (per hr): not stated
- Photoperiod (hrs dark / hrs light): 12 / 12

IN-LIFE DATES: From: To:

Route of administration:

oral: gavage

Vehicle:

CMC (carboxymethyl cellulose)

Remarks:

1%

Details on oral exposure:

VEHICLE
- Concentration in vehicle: 21.5 - 100 mg/ml (males and females)
- Amount of vehicle (if gavage): 4.64 ml/kg bw
- Justification for choice of vehicle: not stated
- Lot/batch no. (if required): E 114 30100
- Purity: not stated

MAXIMUM DOSE VOLUME APPLIED: 4.64 ml/kg bw

DOSAGE PREPARATION (if unusual): Test substance was suspended in the vehicle immediately before dosing using a homogenizer

Doses:

100, 215 or 464 mg/kg bw

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: Continously for first 4 - 6 hours, and then once daily. Body weights recorded at the beginning and also 7 and 14 days after administration, or after death of the animals on days 2 - 14.
- Necropsy of survivors performed: yes
- Other examinations performed: clinical signs, body weight, histopathology (kidneys)

Statistics:

Probit analysis

Sex:

male/female

Dose descriptor:

LD50

Effect level:

195 mg/kg bw

95% CL:

>= 142 - <= 268

Sex:

male

Dose descriptor:

LD50

Effect level:

184 mg/kg bw

95% CL:

>= 85.1 - <= 357

Sex:

female

Dose descriptor:

LD50

Effect level:

212 mg/kg bw

95% CL:

>= 105 - <= 423

Mortality:

10/10 at 464 mg/kg bw dose
4/5 males at 215 mg/kg bw dose
3/5 females at 215 mg/kg bw dose

Time of death: 5/sex between 6-24 h post-dose of 464 mg/kg bw. 215 mg/kg bw dose: 1, 2 and 1 males died on days 2, 3 and 5, respectively; females, 1,1 and 1 died 6-24 h and days 2 and 3, respectively.

Clinical signs:

other: Onset of symptoms only reported as occurring 1.5 hr - 4 days after treatment. Deceased animals: 464 mg/kg bw: hypokinesia, diarrhoea, sunken sides, stilted, restrained and staggered gait, tremor, clonic convulsions, tonic convulsions of the hind legs, su

Gross pathology:

464 mg/kg bw: males - glandular stomach reddened and/or hardened walls (5), yellow deposit in glandular mucosa (5), small intestine filled with fluid (3) lung beige discolouration (1).
Females - glandular stomach reddened and/or hardened walls (5), yellow deposit in glandular mucosa (5), Stomach (3) or small intestine (4) filled with fluid, non-collapsed lung (1).
215 mg/kg bw: males - glandular stomach reddened and/or hardened walls (4), small intestine (1), bladder (1) and thoracic cavity (2) filled with fluid, pale kidneys (2), stomach yellow content (1). Females - glandular stomach reddened and/or hardened walls (3), small intestine (2) and thoracic cavity (1) filled with fluid.

Other findings:

Microscopic findings: 5/sex showed marked necrosis and degeneration of the proximal renal tubules at 464 mg/kg bw, and 3 males and 1 female at 215 mg/kg bw. Minimal to marked changes in proximal tubules in 1 male and 2 females at 215 mg/kg bw and 3/sex at 100 mg/kg bw.

Interpretation of results:

Toxicity Category III

Remarks:

Migrated information Criteria used for interpretation of results: EU

Conclusions:

The acute oral LD50 of potassium hexachloroplatinate was determined to be 195 mg/kg bw in rats.

Executive summary:

The acute toxicity of potassium hexachloroplatinate was investigated in Sprague-Dawley rats, in an OECD Test Guideline 401 study, conducted according to GLP. Animals (5/sex/group) were administered the test substance (as a suspension in 1% carboxymethylcellulose) by oral gavage at doses of 100, 215 or 464 mg/kg bw, and observed for up to 14 days.

 

All animals died at the top dose, while 4 males and 3 females died at 215 mg/kg bw. Deaths occurred 1 to 5 days after administration. No mortality was observed in the low dose groups. Toxic effects included hypokinesia, stilted, staggered and restrained gait, tremor, diarrhoea, and sunken sides. Additionally, clonic and tonic convulsions and piloerection were detected. Individual animals showed loss of muscle tone and righting, pain and corneal reflexes, red crusted nose, or prolapse of penis. Microscopic examination of the kidneys revealed severe to very severe acute necrosis and degeneration of the proximal tubules at the highest two doses. The acute oral LD50 was determined (using probit analysis) to be 184 mg/kg bw in male rats (95% CI 85.1-357 mg/kg bw), 212 mg/kg bw in females (95% CI 105-423 mg/kg bw) and 195 mg/kg bw for both sexes combined (95% CI 142 -268 mg/kg bw).

 

Based on the results of this study, the test material should be classified for acute oral toxicity (category 3) according to EU CLP criteria (EC 1272/2008).

Endpoint conclusion

Endpoint conclusion:

adverse effect observed

Dose descriptor:

LD50

Value:

195 mg/kg bw

Quality of whole database:

Overall, good-quality database which meets REACH Standard Information Requirements.

Acute toxicity: via inhalation route

Endpoint conclusion

Endpoint conclusion:

no study available

Acute toxicity: via dermal route

Endpoint conclusion

Endpoint conclusion:

no study available

Additional information

No relevant acute toxicity human data were identified, or acute dose toxicity laboratory animal data with dipotassium hexachloroplatinate..

 

The acute toxicity of potassium hexachloroplatinate was investigated in Sprague-Dawley rats, in an OECD Test Guideline 401 study, conducted according to GLP. Animals (5/sex/group) were administered the test substance (as a suspension in 1% carboxymethylcellulose) by oral gavage at doses of 100, 215 or 464 mg/kg bw, and observed for up to 14 days. All animals died at the top dose, while 4 males and 3 females died at 215 mg/kg bw. Deaths occurred 1 to 5 days after administration. No mortality was observed in the low dose groups. Toxic effects included hypokinesia, stilted, staggered and restrained gait, tremor, diarrhoea, and sunken sides. Additionally, clonic and tonic convulsions and piloerection were detected. Individual animals showed loss of muscle tone and righting, pain and corneal reflexes, red crusted nose, or prolapse of penis. Microscopic examination of the kidneys revealed severe to very severe acute necrosis and degeneration of the proximal tubules at the highest two doses. The acute oral LD50 was determined (using probit analysis) to be 184 mg/kg bw in male rats (95% CI 85.1-357 mg/kg bw), 212 mg/kg bw in females (95% CI 105-423 mg/kg bw) and 195 mg/kg bw for both sexes combined (95% CI 142 -268 mg/kg bw) (Berthold, 1995a). Based on the results of this study, the test material should be classified for acute oral toxicity (category 3) according to EU CLP criteria (EC 1272/2008).

 

No acute inhalation toxicity data were identified. However, as the compound is classified for respiratory sensitisation (category 1A), the corresponding safety/protective measures will ensure that the potential for inhalation exposure is strictly controlled. Hence, exposure at levels sufficient to invoke considerations of acute inhalation toxicity is not anticipated.

 

Similarly, no acute dermal toxicity data were identified. However, as the compound is classified for skin sensitisation (category 1B), the corresponding safety/protective measures will ensure that the potential for skin exposure is minimised. Moreover, skin contact during production and/or use is expected to be negligible.

Justification for classification or non-classification

Based on the results of the available and reliable acute oral rat study, dipotassium hexachloroplatinate should be classified for acute oral toxicity (category 3) according to EU CLP criteria (EC 1272/2008).

 

No evidence of specific target organ toxicity was noted. As such, classification for STOT-SE is not considered appropriate.