Registration Dossier

Physical & Chemical properties

Flammability

Currently viewing:

Administrative data

Link to relevant study record(s)

Description of key information

Waiving for flammability in contact with water and pyrophoricity; read-across used for flammable solids, from lead metal powder (testing according to EU Method A.10).

Key value for chemical safety assessment

Flammability:
not classified

Additional information

Lead dichloride is an inorganic metal salt (Pb[2+] and Cl[-] ions) and can safely be assumed not to be combustible (not flammable and no pyrophoric properties). It is readily soluble in water (ca. 10 g/L at 20°C), producing a stable solution, yielding only dissolved ions and no flammable gases. Furthermore, long-term industrial handling experience does not indicate any concern for flammability, pyrophoricity, or flammability in contact with water. Thus, no classification for flammability is applicable to lead dichloride.

Justification for classification or non-classification

No classification required.

Flammable solids - read-across: the source substance, lead metal powder, could not be ignited with a flame and was thus deemed "not classified" under Regulation 1272/2008. Since lead dichloride represents a further oxidised form of lead and is thus intrinsically less combustible than lead itself, a test conducted according to the same method can not reasonably be expected to yield any result other than "not flammable". Testing of lead dichloride is not required in accordance with REACH Annex XI, Section 1.5 (read-across). Furthermore, during several decades of manufacture, marketing and downstream use, the substance has never been reported to exhibit flammability.

Pyrophoricity - waiver: Testing for pyrophoric properties is not considered to be required, since this substance is stable at ambient temperature (melting point 501°C, boiling point 950°C). This substance also does not contain any chemical groups that might lead to spontaneous ignition a short time after coming in contact with air, and long-term industrial (decades of) handling of the substance has not yielded any pyrophoric behaviour.

Flammability in contact with water - waiver: Lead dichloride is readily soluble in water (ca. 10 g/L at 20°C), yielding only inorganic ions, forming a stable solution. The substance does not contain groups that might lead to a reaction with water or damp air, leading to the development of dangerous amounts of gas or gases which may be highly flammable; and formation of gases was not observed during water solubility testing. Furthermore, experience in practical handling of the substance shows that it does not react with water, and experimental testing for water solubility has not reported formation of any gas.