Registration Dossier

Administrative data

Description of key information

Key value for chemical safety assessment

Skin sensitisation

Endpoint conclusion
Additional information:

Hydrogen bromide (HBr) and hydrobromic acid are classified/labelled with the symbols “C” and “Xi” and the risk phrases “R35” and “R37”. In addition, the pH of hydrobromic acid (the strong mineral acid formed by HBr in water) is known to be acidic – the pH of a 62 % solution is 1. Toxicological studies and clinical observations in humans (Sections 8.5.2, 8.6.1 and 8.6.4) have shown that HBr gas and hydrobromic acid are well known to cause burns to skin and eyes. The corrosive properties of the substance will preclude sensitization effects and the risk mitigation measures to prevent contact with the skin, eyes and respiratory system will be protective against sensitisation effects.


Migrated from Short description of key information:
Hydrogen bromide (HBr) and hydrobromic acid are classified/labelled with the symbols “C” and “Xi” and the risk phrases “R35” and “R37”. In addition, the pH of hydrobromic acid (the strong mineral acid formed by HBr in water) is known to be acidic – the pH of a 62 % solution is 1. Toxicological studies and clinical observations in humans (Sections 8.5.2, 8.6.1 and 8.6.4) have shown that HBr gas and hydrobromic acid are well known to cause burns to skin and eyes. The corrosive properties of the substance will preclude sensitization effects and the risk mitigation measures to prevent contact with the skin, eyes and respiratory system will be protective against sensitisation effects.

Justification for classification or non-classification