Registration Dossier
Registration Dossier
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EC number: 211-425-8 | CAS number: 644-97-3
Endpoint summary
Administrative data
Description of key information
Secondary data indicates that the substance is corrosive to rabbit skin after 24h exposure. Therefore, no further experimental data on eye irritation is needed. Corrosive properties are consistent with release of hydrochloric acid upon contact with water. Therefore, the hazard class of HCl is applied.
Key value for chemical safety assessment
Skin irritation / corrosion
Endpoint conclusion
- Endpoint conclusion:
- adverse effect observed (corrosive)
Respiratory irritation
Endpoint conclusion
- Endpoint conclusion:
- no study available
Additional information
The substance reacts with water to release hydrochloric acid. Therefore corrosive properties are expected. A study on acute dermal irritation performed in 1972 under the US TSCA8e law, and some information on this study is publicly available. All six rabbits showed corrosion of the skin (Draize score 4 on a scale of 0 -4) at the 4h, 24h and 48h reading. Shorter exposures or observation points are not available. From the overall data presentation, it is likely that the amount applied is the standard dose of 0.5g per animal, although no specific information is given. From this information, it is not possible to make a distinction as to subcategories corrosive/highly corrosive. However, the substance releases hydrochloric acid upon contact with water. Therefore, the legal classification of hydrochloric acid is applied (C; R34 or GHS Category 1B).
No experimental data is available regarding respiratory irritation.
Effects on skin irritation/corrosion: corrosive
Justification for classification or non-classification
Dangerous Substance Directive (67/548/EEC)
The available secondary information is considered reliable and suitable for classification purposes under 67/548/EEC. As a result the substance is considered to be classified as corrosive to skin and eyes (R34) under Directive 67/548/EEC, as amended for the 28th time in Directive 2001/59/EC.
Classification, Labelling, and Packaging Regulation (EC) No. 1272/2008
The available secondary information is considered reliable and suitable for classification purposes under 67/548/EEC. As a result the substance is considered to be classified as corrosive with Class 1B under Regulation (EC) No. 1272/2008, as amended for the second time in Directive (EC 286/2011).
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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