Registration Dossier
Registration Dossier
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EC number: 235-727-4 | CAS number: 12626-81-2
Endpoint summary
Administrative data
Description of key information
Sparingly soluble and non soluble lead compounds do not exhibit irritant or corrosive properties.
Key value for chemical safety assessment
Skin irritation / corrosion
Endpoint conclusion
- Endpoint conclusion:
- no adverse effect observed (not irritating)
Eye irritation
Endpoint conclusion
- Endpoint conclusion:
- no adverse effect observed (not irritating)
Additional information
Reliable animal data were found indicating that lead oxide, lead phosphite lack irritating properties for the skin or the eyes. The experimental data are reinforced by a lack of reports of skin or eye irritation in the many occupational exposure environments which provide opportunities for exposure of lead and sparingly soluble lead compounds to the skin and eyes. Classification for these endpoints is clearly not needed. Specific studies of lung irritation were not found, but the lack of inhalation toxicity from lead oxide in both acute toxicity testing and inhalation cancer bioassays combine with an absence of reports of lung irritation in occupational settings to suggest classification is not needed.
The substances for which data are available should permit data waiving for a number of other substances (including Lead titanium zirconium oxide). The three tested compounds are all sparingly soluble (and thus unlikely to undergo significant dissolution when applied to the skin, eyes or inhaled). The tested compounds further include one compound with an organic anion (lead phtalate) and one with an inorganic anion (lead phosphite which enables the waiving of lead titanium zirconium oxide). Literature searches have failed to identify anions in other sparingly soluble substances that would alter the irritant properties of other sparingly soluble lead salts. Finally, dermal, oral and inhalation toxicity studies for lead compounds are uniformly negative and further support a finding of no irritant properties. Data waiving for all irritant classification endpoints should thus be possible for metallic lead and other sparingly soluble lead salts (unless anions are present that literature searches suggest might impart irritating properties).
No studies were found documenting corrosive properties of lead and sparingly soluble lead compounds in either experimental animals or humans. Given the negative findings of acute toxicity and irritation studies and the absence of reports from occupationally exposed workers, corrosive properties are not to be expected for lead or its sparingly soluble compounds.
Justification for classification or non-classification
Sparingly soluble and non soluble lead compounds do not exhibit irritant or corrosive properties.
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